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
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
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
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
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
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
Bioremediation has gained significant attention due to its potential to remove azo dyes.However,the challenges microor-ganisms face in surviving when azo dyes are the sole carbon source limit its widespread applicatio...Bioremediation has gained significant attention due to its potential to remove azo dyes.However,the challenges microor-ganisms face in surviving when azo dyes are the sole carbon source limit its widespread application.This study aimed to improve the biodegradation of azo dyes by utilizing Baijiu distiller’s grains leachate(BDGL)as a co-substrate.The experimental results demon-strated that BDGL significantly enhanced Providencia rettgeri’s ability to degrade the model pollutant Acid Black 210(AB210),achieving a decolorization efficiency of 94.5%.This may be attributed to the nutrient-rich composition of BDGL,which includes ethanol and protein,providing a favorable substrate for bacterial growth and activity.The higher biomass and increased activities of azoreductase and quinone oxidoreductase in the BDGL group further supported these findings.Additionally,this method demonstra-ted broad-spectrum degradation of azo dyes(Direct Red 5B,Acid Red 73,and Congo Red)with different structures,highlighting its potential applicability.Metabolite assays combined with transcriptomics analyses revealed that the expression of functional genes re-lated to redox reactions,azo bond cleavage,and hydrolysis increased under the co-metabolic conditions of BDGL,resulting in stronger reducing power that further mineralized the dye into smaller metabolites.Our study offers a practical strategy for the simulta-neous treatment of dye-containing wastewater and Baijiu distiller’s grains,with significant environmental and industrial applications.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
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
Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes we...Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes were carried out in the suspension system of LaCoO 3 . The results show that the pervoskite type oxide LaCoO 3 has good photocatalytic activity.Studied by X ray photoelectron spectroscopy and photoacoustic spectra, its photocatalytic activity is found to be related with factors such as the d electron structure of ion Co 3+ ,Co—O binding energy and adsorbed oxygen on the surface etc.展开更多
A series of new NIR dyes bearing 4-(4-morpholinyl) phenyl and substituted phenyl, were synthesized. The maximum absorption wavelengths of these dyes range from 928 nm to 990 nm.
The sorption behaviour of acid dyes by soybean protein/poly(vinyl alcohol) blend fibre was studied. The quantity of dye sorbed by the fibre increased markedly with the decrease in the pH of dyebath and reduced with th...The sorption behaviour of acid dyes by soybean protein/poly(vinyl alcohol) blend fibre was studied. The quantity of dye sorbed by the fibre increased markedly with the decrease in the pH of dyebath and reduced with the addition of neutral electrolyte when the pH was below 4.5. Acid dyes exhibited higher sorption rate constant and lower half dyeing time for the fibre than for spun silk and wool, which was related to the special morphological structure of the fibre. At pH 4, the sorption of disulphonated acid dyes with higher molecular weight followed the dual sorption mechanism of Langmuir plus Nernst-type partitioning well as they interacted with the fibre through electrostatic forces, hydrophobic forces and hydrogen bonds. It is considered that soybean protein and PVA components should be simultaneously dyed by disulphonated acid dyes with higher molecular weight.展开更多
The synthesis and upconverted fluorescent properties of three novel organic compoundswith the structure: donor/bridge/acceptor are reported. The dyes show strong upconvertedfluorescence.
The photo-reactions between metabolic products of human sweat and dyestuffs on garments may produce many toxic substances which could directly contact skin and threaten human health. In order to investigate the impact...The photo-reactions between metabolic products of human sweat and dyestuffs on garments may produce many toxic substances which could directly contact skin and threaten human health. In order to investigate the impact of the perspiration on photo-fading of reactive dyes on cellulose, nine commercial reactive dyes belonging to three types of chromophores (azo, Cu-complex azo and anthraquinone) respectively were chosen and their perspiration-light stability on cotton fabric was studied following ATTS test standard. It is found that the impact of the artificial perspiration on dyes varies with different chromophores: anthraquinone reactive dyes always show the best photo-stability, whereas Cu-complex azo reactive dyes appear to be the most sensitive under exposure to light and perspiration. The pH value of perspiration also greatly influences the fading of dyes with different reactive groups: the fading rate of most chlorotriazinyl reactive dyes in acidic perspiration (pH=3.5) is higher than in alkaline perspiration (pH=8.0), while the reverse is true for most vinylsulphonyl dyes. Furthermore, the study of the contribution of individual component of the artificial perspiration discloses that L-Histidine monohydrochloride monohydrate, DL-Aspartic acid and lactic acid play the major roles on the photo-fading of those selected dyestuffs and inorganic salts including disodium hydrogen phosphate and sodium chloride usually decelerate photo-fading.展开更多
Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the st...Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the striking beauty of its blue-and-white harmony and,especially,for its printing and dyeing being performed by hand.展开更多
Materials exhibiting broadband nonlinear optical responses are critically important for ultrafast photonics applications,particularly as saturable absorbers(SAs)that facilitate broadband optical pulse generation.In th...Materials exhibiting broadband nonlinear optical responses are critically important for ultrafast photonics applications,particularly as saturable absorbers(SAs)that facilitate broadband optical pulse generation.In this study,tea polyphenolpolyvinyl alcohol(TP-PVA)composite films are synthesized via a polymer embedding method and employed as SAs to initiate ultrafast pulse operation in fiber lasers.The TP-PVA SA film exhibits excellent broadband saturable absorption performance at wavelengths of 1.0μm,1.5μm,and 2.0μm,with modulation depths of 54.21%,41.41%,and 51.16%,respectively.Stable passively mode-locked pulses with pulse widths of 588 fs,419 fs,and 743 fs are generated in Yb-,Er-,and Tm-doped fiber lasers,respectively.This work confirms the effective performance of TP-PVA as a broadband SA,and establishes a foundation for the integration of novel and sustainable materials within ultrafast photonic systems.The approach paves the way for developing compact broadband ultrafast laser systems operating in the near-infrared spectral region.展开更多
Monforts dyeing and finishing technology customers from Pakistan had a formidable presence at the Heimtextil 2026 home and contract textiles exhibition,which attracted over 48,000 visitors to Frankfurt in Germany from...Monforts dyeing and finishing technology customers from Pakistan had a formidable presence at the Heimtextil 2026 home and contract textiles exhibition,which attracted over 48,000 visitors to Frankfurt in Germany from January 13 to 16.They included key home furnishings suppliers such as Crestex,Faisal,Gohar,and Kausar Processing,all based in the Faisalabad region of the country,Karachi-based Al Karam,Adamjee,Liberty,Lucky and Rainbow,and Kohinoor,Nishat Chunian and Sapphire of Lahore,to name but a few.展开更多
The thoracic duct(TD),the largest lymphatic vessel in the human body,plays a critical role in returning lymph to the circulatory system.However,its dynamic,distensible nature and concealed anatomical location make int...The thoracic duct(TD),the largest lymphatic vessel in the human body,plays a critical role in returning lymph to the circulatory system.However,its dynamic,distensible nature and concealed anatomical location make intraoperative visualization critically challenging and increase the risk of injury.Real-time,high-resolution assessment of TD leaks remains an urgent clinical need.Here,we present a breakthrough molecular engineering strategy that leverages an intestinally lipophilic fluorescent formulation for dynamic in vivo TD imaging.Our rationally designed cyanine derivative IR790+,known for its rapid membrane permeability and endoplasmic reticulum(ER)targeting localization,demonstrates unprecedented chylomicron affinity,which subsequently transports the dye through the lymphatic system to the TD.Notably,dynamic,high-contrast intraoperative TD imaging is achieved from rat models to swine models.Administered orally as near-infrared(NIR)fluorescent contrast agent,this ultra-stable IR790+@oil formulation,engineered via flash nanoprecipitation,surpasses conventional counterparts by enabling non-invasive,real-time identification of TD.Intriguingly,this first-reported ER-targeting NIR formulation,delivered orally,represents a paradigm shift in fluorescence-guided surgery,significantly improving intraoperative accuracy.展开更多
The level of glutathione(GSH)is significantly associated with numerous pathological processes,thus,real-time detection of the GSH level is of significance for early diagnosis of GSH-related diseases.Herein,we develope...The level of glutathione(GSH)is significantly associated with numerous pathological processes,thus,real-time detection of the GSH level is of significance for early diagnosis of GSH-related diseases.Herein,we developed in vivo second near-infrared(NIR-II)window fluorescence(FL)and ratiometric photoacoustic(RPA)dual-modality imaging of GSH using a GSH-activatable probe(LET-14).LET-14 was synthesized based on a rhodamine hybrid xanthene skeleton with a FL shielding 2,4-dinitrobenzene sulfonyl group that can be specifically cleaved by GSH,thus resulting in a markedly bathochromic-shift absorption,a 6.5-fold increase in NIR-II FL intensity(FL920)and a 13-fold increase in RPA signal(PA880/PA705)in vitro.Intriguingly,LET-14 exhibits good selectivity and sensitivity for NIR-II FL and RPA dual-modality imaging of GSH in 4T1 tumor-bearing mouse model.Our findings develop an in vivo detection tool of GSH,which has great potential in the field of cancer diagnosis.展开更多
Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes we...Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes were carried out in the suspension system of LaCoO 3 . The results show that the pervoskite type oxide LaCoO 3 has good photocatalytic activity.Studied by X ray photoelectron spectroscopy and photoacoustic spectra, its photocatalytic activity is found to be related with factors such as the d electron structure of ion Co 3+ ,Co—O binding energy and adsorbed oxygen on the surface etc.展开更多
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 National Key Re-search and Development Project of China(No.2023YFC3108400).
文摘Bioremediation has gained significant attention due to its potential to remove azo dyes.However,the challenges microor-ganisms face in surviving when azo dyes are the sole carbon source limit its widespread application.This study aimed to improve the biodegradation of azo dyes by utilizing Baijiu distiller’s grains leachate(BDGL)as a co-substrate.The experimental results demon-strated that BDGL significantly enhanced Providencia rettgeri’s ability to degrade the model pollutant Acid Black 210(AB210),achieving a decolorization efficiency of 94.5%.This may be attributed to the nutrient-rich composition of BDGL,which includes ethanol and protein,providing a favorable substrate for bacterial growth and activity.The higher biomass and increased activities of azoreductase and quinone oxidoreductase in the BDGL group further supported these findings.Additionally,this method demonstra-ted broad-spectrum degradation of azo dyes(Direct Red 5B,Acid Red 73,and Congo Red)with different structures,highlighting its potential applicability.Metabolite assays combined with transcriptomics analyses revealed that the expression of functional genes re-lated to redox reactions,azo bond cleavage,and hydrolysis increased under the co-metabolic conditions of BDGL,resulting in stronger reducing power that further mineralized the dye into smaller metabolites.Our study offers a practical strategy for the simulta-neous treatment of dye-containing wastewater and Baijiu distiller’s grains,with significant environmental and industrial applications.
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.
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NationalNaturalScienceFoundationofChina (No .59772 0 1 9)
文摘Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes were carried out in the suspension system of LaCoO 3 . The results show that the pervoskite type oxide LaCoO 3 has good photocatalytic activity.Studied by X ray photoelectron spectroscopy and photoacoustic spectra, its photocatalytic activity is found to be related with factors such as the d electron structure of ion Co 3+ ,Co—O binding energy and adsorbed oxygen on the surface etc.
文摘A series of new NIR dyes bearing 4-(4-morpholinyl) phenyl and substituted phenyl, were synthesized. The maximum absorption wavelengths of these dyes range from 928 nm to 990 nm.
基金the Science and Technology Development Project of the Chinese Ministry of Science and Technology ( No2004BA304B05-03)
文摘The sorption behaviour of acid dyes by soybean protein/poly(vinyl alcohol) blend fibre was studied. The quantity of dye sorbed by the fibre increased markedly with the decrease in the pH of dyebath and reduced with the addition of neutral electrolyte when the pH was below 4.5. Acid dyes exhibited higher sorption rate constant and lower half dyeing time for the fibre than for spun silk and wool, which was related to the special morphological structure of the fibre. At pH 4, the sorption of disulphonated acid dyes with higher molecular weight followed the dual sorption mechanism of Langmuir plus Nernst-type partitioning well as they interacted with the fibre through electrostatic forces, hydrophobic forces and hydrogen bonds. It is considered that soybean protein and PVA components should be simultaneously dyed by disulphonated acid dyes with higher molecular weight.
文摘The synthesis and upconverted fluorescent properties of three novel organic compoundswith the structure: donor/bridge/acceptor are reported. The dyes show strong upconvertedfluorescence.
基金Supported by Foundation of University Doctoral Programby the State Ministry of Education (No.20050255002)
文摘The photo-reactions between metabolic products of human sweat and dyestuffs on garments may produce many toxic substances which could directly contact skin and threaten human health. In order to investigate the impact of the perspiration on photo-fading of reactive dyes on cellulose, nine commercial reactive dyes belonging to three types of chromophores (azo, Cu-complex azo and anthraquinone) respectively were chosen and their perspiration-light stability on cotton fabric was studied following ATTS test standard. It is found that the impact of the artificial perspiration on dyes varies with different chromophores: anthraquinone reactive dyes always show the best photo-stability, whereas Cu-complex azo reactive dyes appear to be the most sensitive under exposure to light and perspiration. The pH value of perspiration also greatly influences the fading of dyes with different reactive groups: the fading rate of most chlorotriazinyl reactive dyes in acidic perspiration (pH=3.5) is higher than in alkaline perspiration (pH=8.0), while the reverse is true for most vinylsulphonyl dyes. Furthermore, the study of the contribution of individual component of the artificial perspiration discloses that L-Histidine monohydrochloride monohydrate, DL-Aspartic acid and lactic acid play the major roles on the photo-fading of those selected dyestuffs and inorganic salts including disodium hydrogen phosphate and sodium chloride usually decelerate photo-fading.
文摘Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the striking beauty of its blue-and-white harmony and,especially,for its printing and dyeing being performed by hand.
基金supported by the Opening Foundation of Hubei Key Laboratory for New Textile Materials and Applications Research(Grant No.FZXCL202410)the Key Project of Science and Technology Research Program of Hubei Provincial Department of Education,China(Grant No.D20231704)+1 种基金Wuhan Textile University(Grant No.523058)the Foundation of Wuhan Textile University(Grant No.K24058)。
文摘Materials exhibiting broadband nonlinear optical responses are critically important for ultrafast photonics applications,particularly as saturable absorbers(SAs)that facilitate broadband optical pulse generation.In this study,tea polyphenolpolyvinyl alcohol(TP-PVA)composite films are synthesized via a polymer embedding method and employed as SAs to initiate ultrafast pulse operation in fiber lasers.The TP-PVA SA film exhibits excellent broadband saturable absorption performance at wavelengths of 1.0μm,1.5μm,and 2.0μm,with modulation depths of 54.21%,41.41%,and 51.16%,respectively.Stable passively mode-locked pulses with pulse widths of 588 fs,419 fs,and 743 fs are generated in Yb-,Er-,and Tm-doped fiber lasers,respectively.This work confirms the effective performance of TP-PVA as a broadband SA,and establishes a foundation for the integration of novel and sustainable materials within ultrafast photonic systems.The approach paves the way for developing compact broadband ultrafast laser systems operating in the near-infrared spectral region.
文摘Monforts dyeing and finishing technology customers from Pakistan had a formidable presence at the Heimtextil 2026 home and contract textiles exhibition,which attracted over 48,000 visitors to Frankfurt in Germany from January 13 to 16.They included key home furnishings suppliers such as Crestex,Faisal,Gohar,and Kausar Processing,all based in the Faisalabad region of the country,Karachi-based Al Karam,Adamjee,Liberty,Lucky and Rainbow,and Kohinoor,Nishat Chunian and Sapphire of Lahore,to name but a few.
基金supported by the National Natural Science Foundation of China(22225805,81400681,32394001,32121005)the Shanghai Science and Technology Innovation Action Plan(22Y11907200,23J21901600)the Innovation Program of Shanghai Municipal Education Commission,Shanghai Municipal Health Commission(2024ZZ2025)。
文摘The thoracic duct(TD),the largest lymphatic vessel in the human body,plays a critical role in returning lymph to the circulatory system.However,its dynamic,distensible nature and concealed anatomical location make intraoperative visualization critically challenging and increase the risk of injury.Real-time,high-resolution assessment of TD leaks remains an urgent clinical need.Here,we present a breakthrough molecular engineering strategy that leverages an intestinally lipophilic fluorescent formulation for dynamic in vivo TD imaging.Our rationally designed cyanine derivative IR790+,known for its rapid membrane permeability and endoplasmic reticulum(ER)targeting localization,demonstrates unprecedented chylomicron affinity,which subsequently transports the dye through the lymphatic system to the TD.Notably,dynamic,high-contrast intraoperative TD imaging is achieved from rat models to swine models.Administered orally as near-infrared(NIR)fluorescent contrast agent,this ultra-stable IR790+@oil formulation,engineered via flash nanoprecipitation,surpasses conventional counterparts by enabling non-invasive,real-time identification of TD.Intriguingly,this first-reported ER-targeting NIR formulation,delivered orally,represents a paradigm shift in fluorescence-guided surgery,significantly improving intraoperative accuracy.
基金supported by the National Natural Science Foundation of China(Nos.82372116,U23A2097)Guangdong Basic and Applied Basic Research Foundation(No.2022A1515010620)+2 种基金Shenzhen Medical Research Fund(Nos.B2302047,A2302047)Shenzhen Science and Technology Program(No.JCYJ20220818095806014)Research Team Cultivation Program of Shenzhen University(No.2023QNT019).
文摘The level of glutathione(GSH)is significantly associated with numerous pathological processes,thus,real-time detection of the GSH level is of significance for early diagnosis of GSH-related diseases.Herein,we developed in vivo second near-infrared(NIR-II)window fluorescence(FL)and ratiometric photoacoustic(RPA)dual-modality imaging of GSH using a GSH-activatable probe(LET-14).LET-14 was synthesized based on a rhodamine hybrid xanthene skeleton with a FL shielding 2,4-dinitrobenzene sulfonyl group that can be specifically cleaved by GSH,thus resulting in a markedly bathochromic-shift absorption,a 6.5-fold increase in NIR-II FL intensity(FL920)and a 13-fold increase in RPA signal(PA880/PA705)in vitro.Intriguingly,LET-14 exhibits good selectivity and sensitivity for NIR-II FL and RPA dual-modality imaging of GSH in 4T1 tumor-bearing mouse model.Our findings develop an in vivo detection tool of GSH,which has great potential in the field of cancer diagnosis.
基金NationalNaturalScienceFoundationofChina (No .59772 0 1 9)
文摘Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes were carried out in the suspension system of LaCoO 3 . The results show that the pervoskite type oxide LaCoO 3 has good photocatalytic activity.Studied by X ray photoelectron spectroscopy and photoacoustic spectra, its photocatalytic activity is found to be related with factors such as the d electron structure of ion Co 3+ ,Co—O binding energy and adsorbed oxygen on the surface etc.
