Aiming to solve the problem of large discharge and severe pollution of reactive dyeing wastewater for wool fabrics,peroxodisulfate(SPS)was used for the degradation and recycling of dyeing wastewater containing reactiv...Aiming to solve the problem of large discharge and severe pollution of reactive dyeing wastewater for wool fabrics,peroxodisulfate(SPS)was used for the degradation and recycling of dyeing wastewater containing reactive dye Lanasol Red CE.The process of degrading the reactive dye was determined by using the dye residual rate as the evaluation index.The feasibility of reactive dyeing of wool fabrics using recycled dyeing wastewater was confirmed by measuring the dye uptake,exhaustion and fixation rates,as well as color parameters and fastness of the dyed fabrics.The results showed that the appropriate conditions for degrading Lanasol Red CE were 0.2 g/L SPS,an initial pH value of 3 and 100℃for 30 min.Under these conditions,the dye degradation rate was as high as 93.14%.When the recycled dyeing wastewater was used for dyeing of wool fabrics,the exhaustion rate of Lanasol Red CE exceeded 99%,and the fixation rate was higher than that achieved by the conventional dyeing process.Under the same dyeing conditions,the recycled-dyed fabrics appeared darker.When the number of cycles was fewer than five,the effect on color fastness was not obvious.Although the color fastness to rubbing and washing of the fabrics dyed in the 10th cycle decreased by half a grade and 1 grade,respectively,compared to that of the fabrics dyed with the conventional dyeing process,they still met the production requirements.展开更多
Tie‑dye is a traditional craft that has been passed down through generations.It is an ancient art form that involves tying and dyeing fabric to create beautiful patterns.This craft is not only a way to make clothes an...Tie‑dye is a traditional craft that has been passed down through generations.It is an ancient art form that involves tying and dyeing fabric to create beautiful patterns.This craft is not only a way to make clothes and textiles more colorful but also a way to express creativity and culture.展开更多
Reactive dyes with different reactive groups exhibit different hydrolysis and dyeing behaviors.This is particularly evident in the combination dyeing process,where the competion between hydrolysis and dyeing reactions...Reactive dyes with different reactive groups exhibit different hydrolysis and dyeing behaviors.This is particularly evident in the combination dyeing process,where the competion between hydrolysis and dyeing reactions increases the complexity.Therefore,developing an effective method to monitor the changes in reactive dyes during the dyeing process is important.This study aims to develop a capillary electrophoresis(CE)technique combined with an ultraviolet(UV)detector(CE-UV)for detecting three reactive dyes and their six derivatives(a total of nine analytes).The optimized CE conditions are 20.0 mmol/L sodium tetraborate(Na_(2)B_(4)O_(7)·10H_(2)O),acetonitrile(ACN)with a volume fraction of 15.0%,20.0 mmol/L α-cyclodextrin(α-CD),and at a pH value of 9.0(adjusted with 0.5 mol/L H_(3)BO_(3)).The limit of detection(LOD)(a signal-to-noise ratio of 3)for the nine analytes ranges from 1.38 to 5.06 mg/L.The relative standard deviations(RSDs)for peak areas and migration time are 2.19%-4.96%and 0.29%-2.75%,respectively.The method is capable of accurately identifying three reactive dyes and their six derivatives and monitoring alterations in composition and dyeing behavior during single and combination dyeing processes.展开更多
Yoantion Industrial INC.,LTD.is a listed company Stock Code 301053 specializing in high-end dyeing and finishing equipment.It serves as the vice president unit of the China Textile Machinery Association and the vice p...Yoantion Industrial INC.,LTD.is a listed company Stock Code 301053 specializing in high-end dyeing and finishing equipment.It serves as the vice president unit of the China Textile Machinery Association and the vice president unit of the China Dyeing and Printing Association.The company has been awarded numerous honors including National High-tech Enterprise and National Stenter Development Base.Its leading products are well-received both domestically and internationally.展开更多
Polyethylene terephthalate(PET)fibers are the largest category of chemical fibers and are widely used.However,the dyeing of PET fibers requires high temperature and pressure(130℃and 0.2 MPa),and the dyeing process co...Polyethylene terephthalate(PET)fibers are the largest category of chemical fibers and are widely used.However,the dyeing of PET fibers requires high temperature and pressure(130℃and 0.2 MPa),and the dyeing process consumes huge amounts of energy.Existing studies have shown that the dyeing ability of PET is directly related to the size of the amorphous region,which determines the external conditions for dyeing.In this research,we synthesized a series of low-temperature easydyeing masterbatches,PET-co-polyethylene glycol(PETEG),using polyethylene glycol(PEG)with different number-average molecular masses Mn and additive amounts.The phase domain size of the amorphous region of PET fibers was regulated via the masterbatch method.The relationship between the phase domain size and dyeing performance was explored from three perspectives:the amount of masterbatch,type of masterbatch,and PEG relative molecular mass.The results indicate that the fiber sample with PEG(Mn=2000 g/mol)at a mass fraction of 20%modified masterbatch has a smaller crystalline lamellar thickness(5.59 nm)and a larger interlamellar amorphous layer thickness(6.43 nm).The increase in the long period and lamellar inclination angle results in a looser structure,allowing small molecule dyes to diffuse into the fibers more easily.The dye-uptake increases from 63.21%to 92.66%at 100℃with the addition of the masterbatch.Additionally,the dye-uptake of the modified fibers increases with the relative molecular mass of PEG and the mass fraction of the masterbatch.All modified fibers achieve a staining color fastness of grade 4 or higher.This research demonstrates a simple masterbatch method that enables atmospheric pressure dyeing and provides a practical solution for efficient,low-temperature,and low-energy dyeing of PET fibers.展开更多
This research aims to study the bio-adsorption process of two dyes,Cibacron Green H3G(CG-H3G)and Terasil Red(TR),in a single system and to bring them closer to the industrial textile discharge by a binary mixture of t...This research aims to study the bio-adsorption process of two dyes,Cibacron Green H3G(CG-H3G)and Terasil Red(TR),in a single system and to bring them closer to the industrial textile discharge by a binary mixture of two dyes(TR+CG-H3G).The Cockle Shell(CS)was used as a natural bio-adsorbent.The characterizations of CS were investigated by Fourier transform infrared(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX)and Brunauer–Emmett–Teller(BET).The adsorption potential of Cockle Shells was tested in two cases(single and binary system)and determined by:contact time(0–60 min),bio-adsorption dose(3–15 g/L),initial concentration(10–300 mg/L),temperature(22–61°C)and pH solution(2–12).The study of bio-adsorption(equilibrium and kinetics)was conducted at 22°C.The kinetic studies demon-strated that a pseudo-second-order adsorption mechanism had a good correlation coefficient(R2≥0.999).The Langmuir isotherm modeling provided a well-defined description of TR and CG-H3G bio-adsorption on cockle shells,exhibiting maximum capacities of 29.41 and 3.69 mg/g respectively at 22°C.The thermodynamic study shows that the reaction between the TR,CG-H3G dyes molecules and the bio-adsorbent is exothermic,spontaneous in the range of 22–31°C with the aleatory character decrease at the solid-liquid interface.The study of selectivity in single and binary systems has been performed under optimal operating conditions using the industrial textile rejection pH(pH=6.04).CG-H3G dye is found to have a higher selectivity than TR in single(0–60 min)and binary systems with a range of 6–45 min,as shown by the selectivity measurement.It was discovered that CS has the capability to remove both CG-H3G and TR dyes in both simple and binary systems,making it a superior bio-adsorbent.展开更多
BiVO_(4)porous spheres modified by ZnO were designed and synthesized using a facile two-step method.The resulting ZnO/BiVO_(4)composite catalysts have shown remarkable efficiency as piezoelectric catalysts for degradi...BiVO_(4)porous spheres modified by ZnO were designed and synthesized using a facile two-step method.The resulting ZnO/BiVO_(4)composite catalysts have shown remarkable efficiency as piezoelectric catalysts for degrading Rhodamine B(RhB)unde mechanical vibrations,they exhibit superior activity compared to pure ZnO.The 40wt%ZnO/BiVO_(4)heterojunction composite displayed the highest activity,along with good stability and recyclability.The enhanced piezoelectric catalytic activity can be attributed to the form ation of an I-scheme heterojunction structure,which can effectively inhibit the electron-hole recombination.Furthermore,hole(h+)and superoxide radical(·O_(2)^(-))are proved to be the primary active species.Therefore,ZnO/BiVO_(4)stands as an efficient and stable piezoelectric catalyst with broad potential application in the field of environmental water pollution treatment.展开更多
Hair coloring has emerged as an integral part of the cosmetic industry,particularly in response to the increasing global aging phenomenon.The natural melanin analog,polydopamine(PDA),has garnered considerable attentio...Hair coloring has emerged as an integral part of the cosmetic industry,particularly in response to the increasing global aging phenomenon.The natural melanin analog,polydopamine(PDA),has garnered considerable attention as an eco-friendly hair dye,and several kinds of polymerization ways of dopamine(DA)have been proposed including alkali catalysis,metal ion catalysis,strong oxidants,and enzyme-mediated oxidation reactions and polymerizations.Yet the controllability of polymerization and potential toxicity of involved metal ions are still in question.Inspired by the photoprotective mechanism in human skin,we have developed the melanin-inspired hair dyeing strategy that allowed for the in situ oxidative polymerization of DA under ultraviolet(UV)light.This polymerization was triggered by photobase generators(PBGs),a class of compounds that produced organic bases upon UV and sunlight irradiation.The resulting hair showed an adjustable color from light brown to black by tuning the ratio of DA and PBG(DA@PBG),the concentration of DA,and light exposure time.The dyed hairs showed excellent washing resistance and superior anti-static properties.Furthermore,Hair Color Spray DA@PBG also demonstrated a desirable hair dyeing effect and excellent biosecurity by simply spraying it on the hair under sunlight.This novel sunlight-induced method provided a new direction towards the preparation of natural hair dyes and could promote the development of green and safe hair dyes in colorful and brilliant artistic-grade hair coloring.展开更多
This research aims to investigate the potential of a plant cellulose developed from Opuntia ficus-indica(OFI)cladode as a sustainable and renewable adsorbent for the removal of neutral red(NR),a cationic dye pollutant...This research aims to investigate the potential of a plant cellulose developed from Opuntia ficus-indica(OFI)cladode as a sustainable and renewable adsorbent for the removal of neutral red(NR),a cationic dye pollutant,from aqueous environments.Analysis of raw and treated OFI using X-ray diffraction(XRD),scanning electron microscopy(SEM),and Fourier Transform Infrared Spectroscopy(FTIR)demonstrated the successful extraction of type I_(β)cellulose.The Brunauer–Emmett–Teller(BET)analysis of the nitrogen adsorption-desorption isotherm revealed an improved specific surface area of 12.4 m^(2)/g after treatment.A systematic study of key parameters in batch adsorption experiments revealed removal rates greater than 90%at pH=3,an adsorbent dosage of 3 g/L and an initial dye concentration of 100 mg/L with equilibrium achieved within 2 h.The high correlation coefficient(R^(2)=0.98)obtained with the Langmuir isotherm model suggests that the adsorption behavior is consistent with monolayer surface adsorption.A maximum adsorption capacity(Qm)of 357.1 mg/g for neutral red dye was achieved,demonstrating a significant adsorption capacity relative to other materials such as chitosan-modified activated carbon and halloysite nanotubes.The pseudo-second-order model effectively described the kinetics of the adsorption phenomena.Thermodynamic analysis revealed an exothermic and spontaneous adsorption process,with an enthalpy change(ΔH)of−24.886 kJ/mol,indicative of predominantly physisorption-driven interactions.Moreover,the regenerated cellulose exhibited a retention of over 70%efficiency after multiple adsorption-desorption cycles,highlighting its potential as an excellent reusable adsorbent.The outcomes of this research present an environmentally conscious alternative to synthetic adsorbents,facilitating the effective NR dye removal through renewable and sustainable means.展开更多
Synthetic food dyes,widely used to enhance the visual appeal of food and beverages,are associated with potential neurobehavioral impacts,particularly in children.Despite its banned status in many regions,Auramine O(AO...Synthetic food dyes,widely used to enhance the visual appeal of food and beverages,are associated with potential neurobehavioral impacts,particularly in children.Despite its banned status in many regions,Auramine O(AO)has been detected as a contaminant in various food products.In silico studies have demonstrated that AO can induce neurotoxic effects.Zebrafish were exposed to varying concentrations of AO(5 and 10 mg/L)and acrylamide at 100 mg/L in the positive control(PC)group.Behavioral tests(Novel Object Recognition,Open Field Test,Light-Dark Test,Novel Tank Test,T-maze Test),enzymatic assays,histological analysis,and gene expression studies were conducted.Staining assays such as dichlorodihydrofluorescein diacetate(DCFH-DA)for reactive oxygen species(ROS),acridine orange for apoptosis,thioflavin for amyloid plaques,Alizarin Red S for calcification,and AO accumulation in brain tissue were conducted using High-Performance Liquid Chromatography(HPLC)analysis.AO exposure led to dose-dependent cognitive impairment,anxietylike behaviors,decreased enzymatic marker levels,increased ROS levels,apoptosis,amyloid plaques,and calcification.Gene expression analysis revealed the upregulation of stress and inflammation-related genes and the downregulation of antioxidant and neuroprotective genes.HPLC confirmed AO accumulation in brain tissue.AO induces significant neurotoxicity in zebrafish,with higher concentrations causing more pronounced effects.These findings raise concerns about potential neurotoxic impacts on humans,particularly children,and highlight the need for stringent regulatory measures.展开更多
In this study,layered chitosan-based magnetic nickel ferrite NiFe_(2)O_(4)/chitosan(CS-LDO)composites were synthesized.The results show that under optimal conditions,98%of methylene blue(MB)and 92%of xylenol orange(XO...In this study,layered chitosan-based magnetic nickel ferrite NiFe_(2)O_(4)/chitosan(CS-LDO)composites were synthesized.The results show that under optimal conditions,98%of methylene blue(MB)and 92%of xylenol orange(XO)can be simultaneously degraded within 120 min in the CS-LDO/persulfate(PS)system,and the removal rates of total organic carbon(TOC)and chemical oxygen demand(COD)can reach 67.32%and 74.23%,respectively.In addition,the strong magnetism of the material itself and multiple cycle experiments indicate that CS-LDO has good recyclability and reusability.The results of quenching experiments,electron paramagnetic resonance(EPR)and electrochemical characterization tests demonstrate that the degradation occurred via both radical and non-radical mechanisms.The differing types of reactive oxygen species(ROS)acting and the different electrostatic attraction between the materials and the two dyes lead to a significant difference in the removal effect of two dyes.The degradation mechanism is the redox reaction between Ni^(2+)/Ni^(3+),Fe^(2+)/Fe^(3+)and the synergistic effect of Ni^(3+)/Fe^(2+).Finally,the biotoxicity assessment demonstrated that both the degradation intermediates of mixed dyes and the material itself exhibited low biotoxicity.展开更多
Mitochondria are crucial organelles responsible for maintaining cell growth,and their homeostasis is closely linked to p H regulation.Physiologically,mitochondria exhibit a weakly alkaline state(pH~8.0).However,when s...Mitochondria are crucial organelles responsible for maintaining cell growth,and their homeostasis is closely linked to p H regulation.Physiologically,mitochondria exhibit a weakly alkaline state(pH~8.0).However,when subjected to stress stimuli that cause damage,cells initiate the process of mitophagy,resulting in mitochondrial acidification.Therefore,monitoring changes in mitochondrial p H to comprehend the physiological processes associated with mitophagy is essential.In this study,we developed an asymmetric pentamethine cyanine dye Cy5.5-H-Cy N as a probe for continuous monitoring of mitophagy in living cells.By incorporating an azaindole structure into the dye molecule,a ratiometric fluorescence response was achieved that is specifically responsive to p H variations while preserving its ability to target mitochondria and emit near-infrared fluorescence.Through various methods inducing mitophagy,Cy5.5-H-Cy N was employed to determine mitochondrial p H quantitatively,demonstrating its suitability as an ideal probe for continuous monitoring of mitophagy in living cells.展开更多
Have you noticed the award ceremony dress at the Asian Winter Games Harbin 2025?This time,the fabric for the award ceremony dresses of the Games was created by Zhejiang enterprise WENSLI.This is also the fourth time t...Have you noticed the award ceremony dress at the Asian Winter Games Harbin 2025?This time,the fabric for the award ceremony dresses of the Games was created by Zhejiang enterprise WENSLI.This is also the fourth time that WENSLI has provided customized silk dress fabric for international events after the 2008 Beijing Olympics,the 2016 G20Hangzhou Summit,and the 2022 Asian Games Hangzhou.展开更多
In this study,Opuntia ficus-indica cladode powder(OFIC),locally sourced from Rabta in Tunis,was utilized as a novel,eco-friendly adsorbent in both raw and iron(III)chloride-modified forms.The presence of iron in the m...In this study,Opuntia ficus-indica cladode powder(OFIC),locally sourced from Rabta in Tunis,was utilized as a novel,eco-friendly adsorbent in both raw and iron(III)chloride-modified forms.The presence of iron in the modified material was confirmed by X-ray fluorescence spectroscopy(XRF).The neat and modified biomass were characterized by X-ray diffraction(XRD),Fourier Transform Infrared Spectroscopy(FTIR),thermogravimetric analysis(TGA)and scanning electron microscopy(SEM),and their usefulness as adsorbent for cationic Neutral Red(NR)and anionic Congo Red(CR)dyes were explored under batch conditions.Equilibrium studies revealed that the iron-modified Fe(OH)_(x)@Cellulose adsorbent exhibited superior adsorption capabilities for both dyes compared to the raw material.Moreover,CR dye was more effectively adsorbed by Fe(OH)_(x)@Cellulose than NR.The adsorption isotherms for both dyes were fitted.The results demonstrated that the adsorption of both NR and CR dyes onto the biosorbent Fe(OH)_(x)@Cellulose was closely followed by the Langmuir model,with R^(2) values of 0.980 and 0.973 for NR and CR,respectively,and the pseudo-second-order kinetic model better depicted the adsorption kinetic.Thermodynamic analysis revealed a negative enthalpy value(−67.15 kJ/mol)forNR adsorption,suggesting an exothermic process,while a positive enthalpy value(3.99 kJ/mol)was observed for CR adsorption,indicating an endothermic process.展开更多
Dye-based color films are increasingly considered as viable alternatives to pigment-based color films in complementary metal-oxide-semiconductor(CMOS) image sensors.Herein,a series of azo dyes utilizing 5-methyl-2-phe...Dye-based color films are increasingly considered as viable alternatives to pigment-based color films in complementary metal-oxide-semiconductor(CMOS) image sensors.Herein,a series of azo dyes utilizing 5-methyl-2-phenyl-4-(2-phenylhydrazono)-2,4-dihydro-3H-pyrazol-3-one as the coupling component and aromatic amines with various electron-withdrawing groups(NO_(2),CN,Br) as diazo components were designed and synthesized.The presence of intermolecular hydrogen bonding between the hydrogen atom on the N-H group and the oxygen atom of the C=O group of the hydrazo structure facilitates the formation of a stable six-membered ring.Additionally,the electron-withdrawing groups in the diazo component further stabilize this hydrogen-bonded structure.As a result,these azo dyes(P-2,P-3,P-4,P-5)exhibit not only excellent light stability but also ultra-highly thermal stability(T_(d)> 260℃).Therein,the synthesized dyes P-2 and P-3 with great bright yellow color(~400 nm),proper solubility(~6.00g/100 g)were selected to make for color films.And their dye-based color films displayed ultra-highly thermal and light stability(color difference ΔE<3).Notably,the increased planarity of the molecular structure by hydrogen bonding for the novel dyes ensures a balance between high transmittance(>90%) in the 550-780 nm wavelength range and the solvent resistance of the dye-based color films.This work contributes to the advancement of next-generation smart CMOS devices and offers valuable insights into the design of azo dyes for applications in the field of organic electronics.展开更多
Taking advantage of the relatively automatic and easy operation procedure,continuous-flow catalysis has become a promising wastewater treatment technique for organic dye removal.However,developing suitable packing cat...Taking advantage of the relatively automatic and easy operation procedure,continuous-flow catalysis has become a promising wastewater treatment technique for organic dye removal.However,developing suitable packing catalysts with favorable activity and low flow resistance remains a challenging task for the construction of continuous-flow catalytic systems.In this paper,we report the preparation of a catalytic module,in which palladium clusters(PdC)are incorporated on defect-rich nitrogen-doped holey graphene(NHG)co-assembled withaluminum silicate fibers(ASFs)(PdC/NHG-ASFs).The resultant PdC/NHG-ASFs composite catalyst exhibits an assembly morphology and can be facilely integrated into a glass reactor to construct an efficient fixed-bed system for continuous-flow catalysis.The corresponding catalytic system demonstrates high processing capacity and excellent durability for the reduction of six N-containing organic dyes owing to the robust hierarchical structure and dualactive components(i.e.,NHG and PdC)of the PdC/NHGASFs composite.The processing rate of the fixed-bed system constructed with the PdC/NHG-ASFs catalyst for the reduction of a representative dye(i.e.,4-nitrophenol)was 1.45×10^(-3)mmol·mg^(-1)·min^(-1),surpassing those previously reported for systems based on metal catalysts.Theoretical calculations show that the activity enhancement in nitroarene reduction reaction originate from the synergistic effect of the two active components.The integration of heterogeneous catalysis and flow-chemistry techniques provides a rational design concept for environmental catalysis,offering a more efficient,scalable,and sustainable approach.展开更多
Organic small molecule fluorophores have been widely used in biology and biochemistry to study cellular structures and processes at high spatial and temporal resolution.Small-molecule dyes offer various benefits,such ...Organic small molecule fluorophores have been widely used in biology and biochemistry to study cellular structures and processes at high spatial and temporal resolution.Small-molecule dyes offer various benefits,such as high photostability,low molecular weight,and great biocompatibility.However,the poor brightness of most of conventional dyes in biological environments limits their use in high-quality superresolution fluorescence imaging.Chemists have conceived and developed many methods to enhance the brightness of fluorophores,including structural alterations that raise extinction coefficients and quantum yields.This review outlines current attempts and substantial advances achieved by chemists to improve the brightness of organic small-molecule fluorescent dyes,such as scaffold rigidification and twisted intramolecular charge transfer(TICT)inhibition.We think that this review will help researchers understand the chemical mechanisms involved in increasing the brightness of fluorophores for biological applications.展开更多
Monforts and its partners Archroma and BW Converting are setting new standards in the resource efficient and cost-effective finishing of fabrics.During a recent webinar organised by Germany'sVDMA textile ma-chiner...Monforts and its partners Archroma and BW Converting are setting new standards in the resource efficient and cost-effective finishing of fabrics.During a recent webinar organised by Germany'sVDMA textile ma-chinery association,specialists from the three companies provided details of the range of new energy-saving options that is now available to mills.In particular,BW Converting's Baldwin TexCoat®G4 precision spray technology-in combination with advanced Archroma finishing formula-tions and Monforts MONTEX stenters and MONFORTEX shrinking ranges and related technologiesis pushing the envelope in new standards for sustainable and long-lasting clean productivity.展开更多
The steel industry produces many byproducts, requiring extensive land for storage and causing significant environmental contamination. Industrial effluents discharged into water bodies negatively impact both aquatic e...The steel industry produces many byproducts, requiring extensive land for storage and causing significant environmental contamination. Industrial effluents discharged into water bodies negatively impact both aquatic ecosystems and human health. To solve this problem, this study synthesized a composite of titanium dioxide (TiO_(2)) and steel slag nanocomposites (SSNC) at a 1:2 mass ratio to create a robust photocatalyst for the treatment of synthetic wastewater. The efficacy of this catalyst in degrading various dye pollutants, including methylene blue (MB), was tested under simulated solar light conditions. Comprehensive analyses were conducted to assess the physical and chemical characteristics, crystalline structure, energy gap, and point of zero charge of the composite. The TiO_(2)-SSNC composite catalyst exhibited excellent stability, with a point of zero charge at 8.342 and an energy gap of 2.4 eV. The degradation process conformed to pseudo-first-order kinetics. Optimization of operational parameters was achieved through the response surface methodology. Reusability tests demonstrated that the TiO_(2)-SSNC composite catalyst effectively degraded up to 93.41% of MB in the suspended mode and 92.03% in the coated mode after five cycles. Additionally, the degradation efficiencies for various dyes were significant, highlighting the potential of the composite for broad applications in industrial wastewater treatment. This study also explored the degradation mechanisms and identified byproducts, establishing a pathway for contaminant breakdown. The cost-benefit analysis revealed a total cost of 0.842 8 USD per cubic meter for each treatment activity, indicating low operational and production costs. These findings underscore the promise of the TiO_(2)-SSNC composite as a cost-effective and efficient alternative for wastewater purification.展开更多
The increasing global demand for clean and potable water underscores the need for advanced pollutant remediation technologies in wastewater,such as the degradation of azo dyes,which are known to be harmful to human he...The increasing global demand for clean and potable water underscores the need for advanced pollutant remediation technologies in wastewater,such as the degradation of azo dyes,which are known to be harmful to human health.To address this issue,heterogeneous photocatalysis emerges as a promising strategy for breaking down recalcitrant molecules.However,efforts are required to develop efficient and stable photocatalysts capable of operating under visible light.This study explores the photocatalytic potential of Fe-doped RE_(2)Zr_(2)O_(7-δ)(RE=Pr,Sm,Nd,Y)compositions,synthesized through the microwaveassisted solvothermal method,for the degradation of methylene blue.Characterizations,such as X-ray diffraction(XRD)and Raman spectroscopy,reveal the obtention of single-phase ordered pyrochlore for RE=Pr,Sm and Nd or defect fluorite structures for Y.Photocatalytic tests under visible light demonstrate efficient dye degradation for all Fe-doped samples,Y_(2)Zr_(1.9)Fe_(0.1)O_(6.95)(YZF)defect fluorite being the one that exhibits the highest efficiency.Radical scavenging experiments identify hydroxyl radicals as key contributors to the degradation process,along with photoinduced holes.These materials exhibit minimal leaching of iron ions,confirming their stability,and the best material,YZF,demonstrates effective reusability.The results highlight the potential of Fe-doped RE_(2)Zr_(2)O_(7)compositions as an efficient alternative for application as photocatalysts for the degradation of azo dyes under visible light.展开更多
基金Youth Foundation of Hebei Province Department of Education Fund,China(No.QN2023090)Opening Project of Textile Ecological Dyeing and Finishing Key Laboratory of Sichuan Province(Chengdu Textile College),China(No.2024DF-AO2)Innovation and Entrepreneurship Training Program for College Students,China(No.202410082023)。
文摘Aiming to solve the problem of large discharge and severe pollution of reactive dyeing wastewater for wool fabrics,peroxodisulfate(SPS)was used for the degradation and recycling of dyeing wastewater containing reactive dye Lanasol Red CE.The process of degrading the reactive dye was determined by using the dye residual rate as the evaluation index.The feasibility of reactive dyeing of wool fabrics using recycled dyeing wastewater was confirmed by measuring the dye uptake,exhaustion and fixation rates,as well as color parameters and fastness of the dyed fabrics.The results showed that the appropriate conditions for degrading Lanasol Red CE were 0.2 g/L SPS,an initial pH value of 3 and 100℃for 30 min.Under these conditions,the dye degradation rate was as high as 93.14%.When the recycled dyeing wastewater was used for dyeing of wool fabrics,the exhaustion rate of Lanasol Red CE exceeded 99%,and the fixation rate was higher than that achieved by the conventional dyeing process.Under the same dyeing conditions,the recycled-dyed fabrics appeared darker.When the number of cycles was fewer than five,the effect on color fastness was not obvious.Although the color fastness to rubbing and washing of the fabrics dyed in the 10th cycle decreased by half a grade and 1 grade,respectively,compared to that of the fabrics dyed with the conventional dyeing process,they still met the production requirements.
文摘Tie‑dye is a traditional craft that has been passed down through generations.It is an ancient art form that involves tying and dyeing fabric to create beautiful patterns.This craft is not only a way to make clothes and textiles more colorful but also a way to express creativity and culture.
基金Research Foundation from National Innovation Center of Advanced Dyeing&Finishing Technology,China(No.2022GCJJ15)。
文摘Reactive dyes with different reactive groups exhibit different hydrolysis and dyeing behaviors.This is particularly evident in the combination dyeing process,where the competion between hydrolysis and dyeing reactions increases the complexity.Therefore,developing an effective method to monitor the changes in reactive dyes during the dyeing process is important.This study aims to develop a capillary electrophoresis(CE)technique combined with an ultraviolet(UV)detector(CE-UV)for detecting three reactive dyes and their six derivatives(a total of nine analytes).The optimized CE conditions are 20.0 mmol/L sodium tetraborate(Na_(2)B_(4)O_(7)·10H_(2)O),acetonitrile(ACN)with a volume fraction of 15.0%,20.0 mmol/L α-cyclodextrin(α-CD),and at a pH value of 9.0(adjusted with 0.5 mol/L H_(3)BO_(3)).The limit of detection(LOD)(a signal-to-noise ratio of 3)for the nine analytes ranges from 1.38 to 5.06 mg/L.The relative standard deviations(RSDs)for peak areas and migration time are 2.19%-4.96%and 0.29%-2.75%,respectively.The method is capable of accurately identifying three reactive dyes and their six derivatives and monitoring alterations in composition and dyeing behavior during single and combination dyeing processes.
文摘Yoantion Industrial INC.,LTD.is a listed company Stock Code 301053 specializing in high-end dyeing and finishing equipment.It serves as the vice president unit of the China Textile Machinery Association and the vice president unit of the China Dyeing and Printing Association.The company has been awarded numerous honors including National High-tech Enterprise and National Stenter Development Base.Its leading products are well-received both domestically and internationally.
基金Key R&D Program of the Xinjiang Uygur Autonomous Region,China(No.2024B01011)。
文摘Polyethylene terephthalate(PET)fibers are the largest category of chemical fibers and are widely used.However,the dyeing of PET fibers requires high temperature and pressure(130℃and 0.2 MPa),and the dyeing process consumes huge amounts of energy.Existing studies have shown that the dyeing ability of PET is directly related to the size of the amorphous region,which determines the external conditions for dyeing.In this research,we synthesized a series of low-temperature easydyeing masterbatches,PET-co-polyethylene glycol(PETEG),using polyethylene glycol(PEG)with different number-average molecular masses Mn and additive amounts.The phase domain size of the amorphous region of PET fibers was regulated via the masterbatch method.The relationship between the phase domain size and dyeing performance was explored from three perspectives:the amount of masterbatch,type of masterbatch,and PEG relative molecular mass.The results indicate that the fiber sample with PEG(Mn=2000 g/mol)at a mass fraction of 20%modified masterbatch has a smaller crystalline lamellar thickness(5.59 nm)and a larger interlamellar amorphous layer thickness(6.43 nm).The increase in the long period and lamellar inclination angle results in a looser structure,allowing small molecule dyes to diffuse into the fibers more easily.The dye-uptake increases from 63.21%to 92.66%at 100℃with the addition of the masterbatch.Additionally,the dye-uptake of the modified fibers increases with the relative molecular mass of PEG and the mass fraction of the masterbatch.All modified fibers achieve a staining color fastness of grade 4 or higher.This research demonstrates a simple masterbatch method that enables atmospheric pressure dyeing and provides a practical solution for efficient,low-temperature,and low-energy dyeing of PET fibers.
基金supported by the University Salah Boubnider-Constantine 3 (Algeria).
文摘This research aims to study the bio-adsorption process of two dyes,Cibacron Green H3G(CG-H3G)and Terasil Red(TR),in a single system and to bring them closer to the industrial textile discharge by a binary mixture of two dyes(TR+CG-H3G).The Cockle Shell(CS)was used as a natural bio-adsorbent.The characterizations of CS were investigated by Fourier transform infrared(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX)and Brunauer–Emmett–Teller(BET).The adsorption potential of Cockle Shells was tested in two cases(single and binary system)and determined by:contact time(0–60 min),bio-adsorption dose(3–15 g/L),initial concentration(10–300 mg/L),temperature(22–61°C)and pH solution(2–12).The study of bio-adsorption(equilibrium and kinetics)was conducted at 22°C.The kinetic studies demon-strated that a pseudo-second-order adsorption mechanism had a good correlation coefficient(R2≥0.999).The Langmuir isotherm modeling provided a well-defined description of TR and CG-H3G bio-adsorption on cockle shells,exhibiting maximum capacities of 29.41 and 3.69 mg/g respectively at 22°C.The thermodynamic study shows that the reaction between the TR,CG-H3G dyes molecules and the bio-adsorbent is exothermic,spontaneous in the range of 22–31°C with the aleatory character decrease at the solid-liquid interface.The study of selectivity in single and binary systems has been performed under optimal operating conditions using the industrial textile rejection pH(pH=6.04).CG-H3G dye is found to have a higher selectivity than TR in single(0–60 min)and binary systems with a range of 6–45 min,as shown by the selectivity measurement.It was discovered that CS has the capability to remove both CG-H3G and TR dyes in both simple and binary systems,making it a superior bio-adsorbent.
基金financially supported by the National Natural Science Foundation of China(No.22272151)Public Welfare Technology Application Research Project of Jinhua City,China(No.2023-4-022)。
文摘BiVO_(4)porous spheres modified by ZnO were designed and synthesized using a facile two-step method.The resulting ZnO/BiVO_(4)composite catalysts have shown remarkable efficiency as piezoelectric catalysts for degrading Rhodamine B(RhB)unde mechanical vibrations,they exhibit superior activity compared to pure ZnO.The 40wt%ZnO/BiVO_(4)heterojunction composite displayed the highest activity,along with good stability and recyclability.The enhanced piezoelectric catalytic activity can be attributed to the form ation of an I-scheme heterojunction structure,which can effectively inhibit the electron-hole recombination.Furthermore,hole(h+)and superoxide radical(·O_(2)^(-))are proved to be the primary active species.Therefore,ZnO/BiVO_(4)stands as an efficient and stable piezoelectric catalyst with broad potential application in the field of environmental water pollution treatment.
基金financially supported by the National Natural Science Foundation of China(No.52225311)the Fundamental Research Funds for Central Universities.
文摘Hair coloring has emerged as an integral part of the cosmetic industry,particularly in response to the increasing global aging phenomenon.The natural melanin analog,polydopamine(PDA),has garnered considerable attention as an eco-friendly hair dye,and several kinds of polymerization ways of dopamine(DA)have been proposed including alkali catalysis,metal ion catalysis,strong oxidants,and enzyme-mediated oxidation reactions and polymerizations.Yet the controllability of polymerization and potential toxicity of involved metal ions are still in question.Inspired by the photoprotective mechanism in human skin,we have developed the melanin-inspired hair dyeing strategy that allowed for the in situ oxidative polymerization of DA under ultraviolet(UV)light.This polymerization was triggered by photobase generators(PBGs),a class of compounds that produced organic bases upon UV and sunlight irradiation.The resulting hair showed an adjustable color from light brown to black by tuning the ratio of DA and PBG(DA@PBG),the concentration of DA,and light exposure time.The dyed hairs showed excellent washing resistance and superior anti-static properties.Furthermore,Hair Color Spray DA@PBG also demonstrated a desirable hair dyeing effect and excellent biosecurity by simply spraying it on the hair under sunlight.This novel sunlight-induced method provided a new direction towards the preparation of natural hair dyes and could promote the development of green and safe hair dyes in colorful and brilliant artistic-grade hair coloring.
文摘This research aims to investigate the potential of a plant cellulose developed from Opuntia ficus-indica(OFI)cladode as a sustainable and renewable adsorbent for the removal of neutral red(NR),a cationic dye pollutant,from aqueous environments.Analysis of raw and treated OFI using X-ray diffraction(XRD),scanning electron microscopy(SEM),and Fourier Transform Infrared Spectroscopy(FTIR)demonstrated the successful extraction of type I_(β)cellulose.The Brunauer–Emmett–Teller(BET)analysis of the nitrogen adsorption-desorption isotherm revealed an improved specific surface area of 12.4 m^(2)/g after treatment.A systematic study of key parameters in batch adsorption experiments revealed removal rates greater than 90%at pH=3,an adsorbent dosage of 3 g/L and an initial dye concentration of 100 mg/L with equilibrium achieved within 2 h.The high correlation coefficient(R^(2)=0.98)obtained with the Langmuir isotherm model suggests that the adsorption behavior is consistent with monolayer surface adsorption.A maximum adsorption capacity(Qm)of 357.1 mg/g for neutral red dye was achieved,demonstrating a significant adsorption capacity relative to other materials such as chitosan-modified activated carbon and halloysite nanotubes.The pseudo-second-order model effectively described the kinetics of the adsorption phenomena.Thermodynamic analysis revealed an exothermic and spontaneous adsorption process,with an enthalpy change(ΔH)of−24.886 kJ/mol,indicative of predominantly physisorption-driven interactions.Moreover,the regenerated cellulose exhibited a retention of over 70%efficiency after multiple adsorption-desorption cycles,highlighting its potential as an excellent reusable adsorbent.The outcomes of this research present an environmentally conscious alternative to synthetic adsorbents,facilitating the effective NR dye removal through renewable and sustainable means.
基金supported by the Researchers Supporting Project,King Saud University,Saudi Arabia(No.RSP2025R465)。
文摘Synthetic food dyes,widely used to enhance the visual appeal of food and beverages,are associated with potential neurobehavioral impacts,particularly in children.Despite its banned status in many regions,Auramine O(AO)has been detected as a contaminant in various food products.In silico studies have demonstrated that AO can induce neurotoxic effects.Zebrafish were exposed to varying concentrations of AO(5 and 10 mg/L)and acrylamide at 100 mg/L in the positive control(PC)group.Behavioral tests(Novel Object Recognition,Open Field Test,Light-Dark Test,Novel Tank Test,T-maze Test),enzymatic assays,histological analysis,and gene expression studies were conducted.Staining assays such as dichlorodihydrofluorescein diacetate(DCFH-DA)for reactive oxygen species(ROS),acridine orange for apoptosis,thioflavin for amyloid plaques,Alizarin Red S for calcification,and AO accumulation in brain tissue were conducted using High-Performance Liquid Chromatography(HPLC)analysis.AO exposure led to dose-dependent cognitive impairment,anxietylike behaviors,decreased enzymatic marker levels,increased ROS levels,apoptosis,amyloid plaques,and calcification.Gene expression analysis revealed the upregulation of stress and inflammation-related genes and the downregulation of antioxidant and neuroprotective genes.HPLC confirmed AO accumulation in brain tissue.AO induces significant neurotoxicity in zebrafish,with higher concentrations causing more pronounced effects.These findings raise concerns about potential neurotoxic impacts on humans,particularly children,and highlight the need for stringent regulatory measures.
基金supported by the Fundamental Research Program of Shanxi Province(No.202103021224083).
文摘In this study,layered chitosan-based magnetic nickel ferrite NiFe_(2)O_(4)/chitosan(CS-LDO)composites were synthesized.The results show that under optimal conditions,98%of methylene blue(MB)and 92%of xylenol orange(XO)can be simultaneously degraded within 120 min in the CS-LDO/persulfate(PS)system,and the removal rates of total organic carbon(TOC)and chemical oxygen demand(COD)can reach 67.32%and 74.23%,respectively.In addition,the strong magnetism of the material itself and multiple cycle experiments indicate that CS-LDO has good recyclability and reusability.The results of quenching experiments,electron paramagnetic resonance(EPR)and electrochemical characterization tests demonstrate that the degradation occurred via both radical and non-radical mechanisms.The differing types of reactive oxygen species(ROS)acting and the different electrostatic attraction between the materials and the two dyes lead to a significant difference in the removal effect of two dyes.The degradation mechanism is the redox reaction between Ni^(2+)/Ni^(3+),Fe^(2+)/Fe^(3+)and the synergistic effect of Ni^(3+)/Fe^(2+).Finally,the biotoxicity assessment demonstrated that both the degradation intermediates of mixed dyes and the material itself exhibited low biotoxicity.
基金supported by the Fundamental Research Funds for the Central Universities(Nos.DUT23YG137 and DUT22LAB601)Liaoning Binhai Laboratory(No.LBLB-202303)+1 种基金Liaoning Province Science and Technology Joint Fund(Nos.2023JH2/101800039 and 2023JH2/101800037)National Natural Science Foundation of China(Nos.21925802,22090011,and 21878039)。
文摘Mitochondria are crucial organelles responsible for maintaining cell growth,and their homeostasis is closely linked to p H regulation.Physiologically,mitochondria exhibit a weakly alkaline state(pH~8.0).However,when subjected to stress stimuli that cause damage,cells initiate the process of mitophagy,resulting in mitochondrial acidification.Therefore,monitoring changes in mitochondrial p H to comprehend the physiological processes associated with mitophagy is essential.In this study,we developed an asymmetric pentamethine cyanine dye Cy5.5-H-Cy N as a probe for continuous monitoring of mitophagy in living cells.By incorporating an azaindole structure into the dye molecule,a ratiometric fluorescence response was achieved that is specifically responsive to p H variations while preserving its ability to target mitochondria and emit near-infrared fluorescence.Through various methods inducing mitophagy,Cy5.5-H-Cy N was employed to determine mitochondrial p H quantitatively,demonstrating its suitability as an ideal probe for continuous monitoring of mitophagy in living cells.
文摘Have you noticed the award ceremony dress at the Asian Winter Games Harbin 2025?This time,the fabric for the award ceremony dresses of the Games was created by Zhejiang enterprise WENSLI.This is also the fourth time that WENSLI has provided customized silk dress fabric for international events after the 2008 Beijing Olympics,the 2016 G20Hangzhou Summit,and the 2022 Asian Games Hangzhou.
文摘In this study,Opuntia ficus-indica cladode powder(OFIC),locally sourced from Rabta in Tunis,was utilized as a novel,eco-friendly adsorbent in both raw and iron(III)chloride-modified forms.The presence of iron in the modified material was confirmed by X-ray fluorescence spectroscopy(XRF).The neat and modified biomass were characterized by X-ray diffraction(XRD),Fourier Transform Infrared Spectroscopy(FTIR),thermogravimetric analysis(TGA)and scanning electron microscopy(SEM),and their usefulness as adsorbent for cationic Neutral Red(NR)and anionic Congo Red(CR)dyes were explored under batch conditions.Equilibrium studies revealed that the iron-modified Fe(OH)_(x)@Cellulose adsorbent exhibited superior adsorption capabilities for both dyes compared to the raw material.Moreover,CR dye was more effectively adsorbed by Fe(OH)_(x)@Cellulose than NR.The adsorption isotherms for both dyes were fitted.The results demonstrated that the adsorption of both NR and CR dyes onto the biosorbent Fe(OH)_(x)@Cellulose was closely followed by the Langmuir model,with R^(2) values of 0.980 and 0.973 for NR and CR,respectively,and the pseudo-second-order kinetic model better depicted the adsorption kinetic.Thermodynamic analysis revealed a negative enthalpy value(−67.15 kJ/mol)forNR adsorption,suggesting an exothermic process,while a positive enthalpy value(3.99 kJ/mol)was observed for CR adsorption,indicating an endothermic process.
基金supported by the Program of the National Natural Science Foundation of China(No.22238002)the Fundamental Research Funds for the Central Universities(No.DUT22LAB610)+1 种基金Research and Innovation Team Project of Dalian University of Technology(No.DUT2022TB10)China Postdoctoral Science Foundation(No.2022M720639)。
文摘Dye-based color films are increasingly considered as viable alternatives to pigment-based color films in complementary metal-oxide-semiconductor(CMOS) image sensors.Herein,a series of azo dyes utilizing 5-methyl-2-phenyl-4-(2-phenylhydrazono)-2,4-dihydro-3H-pyrazol-3-one as the coupling component and aromatic amines with various electron-withdrawing groups(NO_(2),CN,Br) as diazo components were designed and synthesized.The presence of intermolecular hydrogen bonding between the hydrogen atom on the N-H group and the oxygen atom of the C=O group of the hydrazo structure facilitates the formation of a stable six-membered ring.Additionally,the electron-withdrawing groups in the diazo component further stabilize this hydrogen-bonded structure.As a result,these azo dyes(P-2,P-3,P-4,P-5)exhibit not only excellent light stability but also ultra-highly thermal stability(T_(d)> 260℃).Therein,the synthesized dyes P-2 and P-3 with great bright yellow color(~400 nm),proper solubility(~6.00g/100 g)were selected to make for color films.And their dye-based color films displayed ultra-highly thermal and light stability(color difference ΔE<3).Notably,the increased planarity of the molecular structure by hydrogen bonding for the novel dyes ensures a balance between high transmittance(>90%) in the 550-780 nm wavelength range and the solvent resistance of the dye-based color films.This work contributes to the advancement of next-generation smart CMOS devices and offers valuable insights into the design of azo dyes for applications in the field of organic electronics.
基金financially supported by the Key Research and Development Program of Hubei Province(No.2022BAA026)the Open Project of Hubei Key Laboratory of Novel Reactor and Green Chemical Technology(No.NRGC202203)+3 种基金the Open/Innovation Project of Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education(No.LCX202203)the Open Project of Key Laboratory of Green Chemical Engineering Process of Ministry of Education(No.GCX2022005)the Open/Innovation Project of Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry(No.2022BEEA06)the Innovation and Entrepreneurship Training Program Funded by Wuhan Institute of Technology(No.202310490007)
文摘Taking advantage of the relatively automatic and easy operation procedure,continuous-flow catalysis has become a promising wastewater treatment technique for organic dye removal.However,developing suitable packing catalysts with favorable activity and low flow resistance remains a challenging task for the construction of continuous-flow catalytic systems.In this paper,we report the preparation of a catalytic module,in which palladium clusters(PdC)are incorporated on defect-rich nitrogen-doped holey graphene(NHG)co-assembled withaluminum silicate fibers(ASFs)(PdC/NHG-ASFs).The resultant PdC/NHG-ASFs composite catalyst exhibits an assembly morphology and can be facilely integrated into a glass reactor to construct an efficient fixed-bed system for continuous-flow catalysis.The corresponding catalytic system demonstrates high processing capacity and excellent durability for the reduction of six N-containing organic dyes owing to the robust hierarchical structure and dualactive components(i.e.,NHG and PdC)of the PdC/NHGASFs composite.The processing rate of the fixed-bed system constructed with the PdC/NHG-ASFs catalyst for the reduction of a representative dye(i.e.,4-nitrophenol)was 1.45×10^(-3)mmol·mg^(-1)·min^(-1),surpassing those previously reported for systems based on metal catalysts.Theoretical calculations show that the activity enhancement in nitroarene reduction reaction originate from the synergistic effect of the two active components.The integration of heterogeneous catalysis and flow-chemistry techniques provides a rational design concept for environmental catalysis,offering a more efficient,scalable,and sustainable approach.
基金supported by the National Science Foundation for Distinguished Young Scholars(No.22325401)the National Natural Science Foundation of China(No.22404049)the China Postdoctoral Science Foundation(No.2024M750866)。
文摘Organic small molecule fluorophores have been widely used in biology and biochemistry to study cellular structures and processes at high spatial and temporal resolution.Small-molecule dyes offer various benefits,such as high photostability,low molecular weight,and great biocompatibility.However,the poor brightness of most of conventional dyes in biological environments limits their use in high-quality superresolution fluorescence imaging.Chemists have conceived and developed many methods to enhance the brightness of fluorophores,including structural alterations that raise extinction coefficients and quantum yields.This review outlines current attempts and substantial advances achieved by chemists to improve the brightness of organic small-molecule fluorescent dyes,such as scaffold rigidification and twisted intramolecular charge transfer(TICT)inhibition.We think that this review will help researchers understand the chemical mechanisms involved in increasing the brightness of fluorophores for biological applications.
文摘Monforts and its partners Archroma and BW Converting are setting new standards in the resource efficient and cost-effective finishing of fabrics.During a recent webinar organised by Germany'sVDMA textile ma-chinery association,specialists from the three companies provided details of the range of new energy-saving options that is now available to mills.In particular,BW Converting's Baldwin TexCoat®G4 precision spray technology-in combination with advanced Archroma finishing formula-tions and Monforts MONTEX stenters and MONFORTEX shrinking ranges and related technologiesis pushing the envelope in new standards for sustainable and long-lasting clean productivity.
基金supported by the Department of Chemical and Petrochemical Engineering,Egypt-Japan University of Science and Technology.
文摘The steel industry produces many byproducts, requiring extensive land for storage and causing significant environmental contamination. Industrial effluents discharged into water bodies negatively impact both aquatic ecosystems and human health. To solve this problem, this study synthesized a composite of titanium dioxide (TiO_(2)) and steel slag nanocomposites (SSNC) at a 1:2 mass ratio to create a robust photocatalyst for the treatment of synthetic wastewater. The efficacy of this catalyst in degrading various dye pollutants, including methylene blue (MB), was tested under simulated solar light conditions. Comprehensive analyses were conducted to assess the physical and chemical characteristics, crystalline structure, energy gap, and point of zero charge of the composite. The TiO_(2)-SSNC composite catalyst exhibited excellent stability, with a point of zero charge at 8.342 and an energy gap of 2.4 eV. The degradation process conformed to pseudo-first-order kinetics. Optimization of operational parameters was achieved through the response surface methodology. Reusability tests demonstrated that the TiO_(2)-SSNC composite catalyst effectively degraded up to 93.41% of MB in the suspended mode and 92.03% in the coated mode after five cycles. Additionally, the degradation efficiencies for various dyes were significant, highlighting the potential of the composite for broad applications in industrial wastewater treatment. This study also explored the degradation mechanisms and identified byproducts, establishing a pathway for contaminant breakdown. The cost-benefit analysis revealed a total cost of 0.842 8 USD per cubic meter for each treatment activity, indicating low operational and production costs. These findings underscore the promise of the TiO_(2)-SSNC composite as a cost-effective and efficient alternative for wastewater purification.
基金Project supported by the Spanish Government and the Ministerio de Ciencia e Innovacion(PID2020-116149 GB-I00)Generalitat Valenciana(GRISOLIA/2019/054)the Brazilian National Council for Scientific and Technological Development(306567/2021-0)。
文摘The increasing global demand for clean and potable water underscores the need for advanced pollutant remediation technologies in wastewater,such as the degradation of azo dyes,which are known to be harmful to human health.To address this issue,heterogeneous photocatalysis emerges as a promising strategy for breaking down recalcitrant molecules.However,efforts are required to develop efficient and stable photocatalysts capable of operating under visible light.This study explores the photocatalytic potential of Fe-doped RE_(2)Zr_(2)O_(7-δ)(RE=Pr,Sm,Nd,Y)compositions,synthesized through the microwaveassisted solvothermal method,for the degradation of methylene blue.Characterizations,such as X-ray diffraction(XRD)and Raman spectroscopy,reveal the obtention of single-phase ordered pyrochlore for RE=Pr,Sm and Nd or defect fluorite structures for Y.Photocatalytic tests under visible light demonstrate efficient dye degradation for all Fe-doped samples,Y_(2)Zr_(1.9)Fe_(0.1)O_(6.95)(YZF)defect fluorite being the one that exhibits the highest efficiency.Radical scavenging experiments identify hydroxyl radicals as key contributors to the degradation process,along with photoinduced holes.These materials exhibit minimal leaching of iron ions,confirming their stability,and the best material,YZF,demonstrates effective reusability.The results highlight the potential of Fe-doped RE_(2)Zr_(2)O_(7)compositions as an efficient alternative for application as photocatalysts for the degradation of azo dyes under visible light.
