Graphene materials like turbostratic graphene exhibit remarkable promise for an array of applications,spanning from electronic devices to aerospace technologies.It is essential to develop a fabrication method that is ...Graphene materials like turbostratic graphene exhibit remarkable promise for an array of applications,spanning from electronic devices to aerospace technologies.It is essential to develop a fabrication method that is not only economical and efficient,but also environmentally sustainable.In this study,the molten salt-assisted magnesiothermic reduction(MSAMR)method is proposed for the synthesis of few-layer turbostratic graphene.K_(2)CO_(3)serves as both the carbon source and the catalyst for graphitization,facilitating the formation of the graphene structure,while in-situ generated MgO nanoparticles exert confinement and templating effects on the growth of graphene.The molten salts used effectively prevent the aggregation and the Bernal stacking of graphene sheets,ensuring the few-layer and turbostratic structure.The synergistic effects of K 2CO 3,in-situ generated MgO,and molten salts guarantee the formation of few-layer turbostratic graphene at a relatively low temperature,characterized with 4–8 stacking layers,a mesopore-dominated microstructure,and a high degree of graphitization.展开更多
The surface microstructure of continuous aramid fibers(AFs)is significant for AF/unsaturated polyester(UP)resin composites.The chemical modification of the AF surface is the key point to enhance mechanical properties ...The surface microstructure of continuous aramid fibers(AFs)is significant for AF/unsaturated polyester(UP)resin composites.The chemical modification of the AF surface is the key point to enhance mechanical properties of AF/UP composites.In this study,the polyethyleneimine(PEI)?polydopamine(PDA)coating was formed on the continuous AF surface via a one-step process.Morphologies and functional groups of PEI-PDA-coated AFs were studied.It was revealed that the interfacial bonding strength between PEI–PDA-AFs and the UP matrix was increased by 82.47%due to formation of the chemical bonding between amino groups on PEI and hydroxyl groups on UP.The tensile strength of the PEI–PDA-AF/UP composite reached 959.07 MPa,increased by 34.19%compared with that before modification.This study presents a simple and efficient method to prepare high-strength continuous AF/UP composites which could be used in engineering fields of deep-sea pipeline,aerospace,construction,military,safety,sports equipment,etc.展开更多
The surface engineering has been testified to be an effective strategy for optimizing oxygen evolution reaction(OER)activity.Nevertheless,many of these techniques involve complex and multiple synthesis process,which l...The surface engineering has been testified to be an effective strategy for optimizing oxygen evolution reaction(OER)activity.Nevertheless,many of these techniques involve complex and multiple synthesis process,which leads to potential safety hazards,raises the cost of production,and hinders the scaled-up application.Herein,a facile strategy(i.e.,quenching with lanthanum nitrate cold salt solution)was adopted to fabricate the surface of Co_(3)O_(4)grown on nickel foam,and boost the electrocatalytic performance for OER.Analyses of the experimental results show that the surface engineering strategy can induce many defects on the surface of Co_(3)O_(4),including microcracks and oxygen vacancies,which provides more active sites for electrochemical reaction.Consequently,the treated sample exhibits significantly improved OER electrocatalytic activity,requiring only 311 mV to deliver 100 mA·cm?2 for OER in alkaline solution.This work highlights the feasibility of designing advanced electrocatalysts towards OER via quenching and extends the use of quenching chemistry in catalysis.展开更多
Layered cobalt oxides are emerging as a pivotal class of cathode materials due to their high theoretical energy density,tunable interlayer spacing for efficient ion diffusion,and structural resilience under electroche...Layered cobalt oxides are emerging as a pivotal class of cathode materials due to their high theoretical energy density,tunable interlayer spacing for efficient ion diffusion,and structural resilience under electrochemical cycling.Here,we report the synthesis of barium cobaltite(Ba_(x)CoO_(2),x≈0.34)through a two-step solid-state reaction coupled with ion exchange,establishing a stable layered structure consisting of alternating Ba?O layers and edge-shared CoO_(6)octahedral sheets.This unique architecture provides an expanded interlayer spacing(c-axis:1.23 nm)and efficient Li+diffusion channels,enabling a lithium-ion battery(LIB)with the Ba xCoO_(2)cathode to achieve ultrahigh reversible capacities of 820.7 mAh·g^(-1)at 0.1C and 483.2 mAh·g^(-1)at 5C,along with 99.37%Coulombic efficiency retained over 1000 cycles,demonstrating remarkable cycling stability.Comparative studies on a sodium-ion battery(SIB)also reveal the superior capacity of the LIB,attributed to smaller ionic radius of Li+and stabilized electrode–electrolyte interface.These results demonstrate that the combination of structural resilience and fast ion kinetics position Ba xCoO_(2)as a promising candidate for high-energy-density storage systems.Further optimization of the Ba/Co ratio and defect engineering may unlock enhanced cyclability for practical applications.展开更多
Reactive oxygen species(ROS)are highly prevalent in skin-related impairments and accelerate chronic ulcer progression.The routine subcutaneous administration approaches combining drug delivery with microenvironment in...Reactive oxygen species(ROS)are highly prevalent in skin-related impairments and accelerate chronic ulcer progression.The routine subcutaneous administration approaches combining drug delivery with microenvironment intervention are widely developed for skin-related treatment but lack effective outcomes.Herein,we present a cuttlefish ink-derived nanoparticles(CNPs)-integrated microneedles patch,silk fibroin and cuttlefish ink-derived melanin nanoparticles(SC-MNs),that can easily be inserted into the skin and alleviate ROS.The microneedle tips,formed from silk fibroin and treated with methanol vapor annealing,turn to increasedβ-sheet and enhanced mechanical strength.Meanwhile,the tips can rapidly detach from SC-MNs in mildly acidic conditions due to the introduction of NaHCO_(3).SC-MNs also exhibited a unique ROS obliteration capacity.Furthermore,under near-infrared irradiation,SC-MNs triggered photothermal performance,which elicited reliable tumor cell-killing effects.Collectively,these SC-MN patches described here can provide a promising platform for combined ROS-scavenging and photothermal therapy,which makes them a potential candidate in skin-related disease management.展开更多
Constructing specific noble metal/metal–organic framework(MOF)nano-heterostructures is an effective strategy for promoting water electrolysis,yet remains highly challenging due to complex synthesis methods,difficulti...Constructing specific noble metal/metal–organic framework(MOF)nano-heterostructures is an effective strategy for promoting water electrolysis,yet remains highly challenging due to complex synthesis methods,difficulties in structural characterization,and the demanding nature of performance optimization.In this work,a heterojunction electrocatalyst was developed through growing Ru nanoparticles on NiFe-MOF nanosheets(NSs)supported by nickel foam(NF)using an easily accessible solvothermal method followed by an annealing strategy.Owing to the electronic interaction between Ru nanoparticles and NiFe-MOF NSs,the optimized Ru@NiFe-MOF/NF catalyst exhibits excellent bifunctional performance for the hydrogen evolution reaction(with an overpotential of 84 mV at 10 mA·cm^(-2))and the oxygen evolution reaction(with an overpotential of 240 mV at 10 mA·cm^(-2))in a 1.0 mol·L^(-1) KOH solution,which is superior to that of commercial catalysts.This study highlights a promising strategy for designing and developing efficient electrocatalysts for overall water electrolysis.展开更多
Magnetic hyperthermia therapy(MHT)has emerged as a promising non-invasive approach for tumor treatment.However,the clinical translation of MHT has been significantly hampered by two critical challenges:insufficient ma...Magnetic hyperthermia therapy(MHT)has emerged as a promising non-invasive approach for tumor treatment.However,the clinical translation of MHT has been significantly hampered by two critical challenges:insufficient magnetothermal conversion efficiency and compromised biosecurity of conventional magnetic nanoparticles.Addressing these limitations,we developed an innovative biomimetic synthesis strategy by engineering cobalt-doped magnetoferritins(PcFn-Co-x)within recombinant hyperthermophilic archaeon ferritin(PcFn)cages at a precisely controlled biomineralization temperature of 90℃.This breakthrough approach yielded monodisperse PcFn-Co-x nanoparticles with core sizes(13.3?19.6 nm)that remarkably surpass the conventional size limitations of ferritin inner cages.The optimized PcFn-Co-5 nanoparticles demonstrated unprecedented magnetothermal performance,achieving a record-high specific absorption rate(SAR)of 910 W·g^(-1) under biologically safe excitation conditions(33 kA·m?1 and 150 kHz).Magnetic characterization revealed that the cobalt doping significantly modulates the magnetic energy barrier by enhancing coercivity and magnetic anisotropy,with SAR values showing a remarkable positive correlation with these magnetic parameters.This work presents a novel paradigm for the biomimetic synthesis of high-performance magnetoferritins and pave the way for their clinical application in MHT.展开更多
In the heterogeneous electro-Fenton(Hetero-EF)process,the generation and activation efficiency of hydrogen peroxide(H_(2)O_(2))is an important factor affecting the performance.Based on ability of Mxene to regulate cha...In the heterogeneous electro-Fenton(Hetero-EF)process,the generation and activation efficiency of hydrogen peroxide(H_(2)O_(2))is an important factor affecting the performance.Based on ability of Mxene to regulate charge density at metal active sites and enhance electronic transport efficiency,a nanoflower-shaped CoSe and plate-shaped Ti_(3)C_(2) composite(CoSe/Ti_(3)C_(2))was developed for use as a Hetero-EF cathode catalyst.The results showed that CoSe/Ti_(3)C_(2) had excellent degradation performance,with a sulfamerazine(SMR)(10 mg·L^(-1))degradation efficiency of 100%within 80 min in the pH range of 3–7.CoSe/Ti_(3)C_(2)(n=2.59)had a lower transfer electron number compared to that of CoSe(n=3.21)and was more inclined towards 2e-ORR.Theoretical calculations showed that Ti_(3)C_(2) regulated the d-band center of CoSe,weakening adsorption strength of Co sites for the*OOH intermediate and making it more inclined to generate H_(2)O_(2).Electron paramagnetic resonance(EPR)and quenching experiments indicated the presence of*OH,*O_(2)^(-),and 1O_(2)in the system,all of which participated in the degradation of pollutants.The construction of a multi reactive oxygen species system enhanced the interference resistance during degradation.展开更多
In the original version,Fig.5(f)is misused because it is identical to Fig.5(e).Figure 5 after correction is shown below:The authors apologize for any confusion.
Advanced materials with surface patterning can improve light management in optoelectronic devices.In this work,we employed nanoimprinting lithography(NIL)using a hard polydimethylsiloxane(PDMS)mold to fabricate two-di...Advanced materials with surface patterning can improve light management in optoelectronic devices.In this work,we employed nanoimprinting lithography(NIL)using a hard polydimethylsiloxane(PDMS)mold to fabricate two-dimensional periodically structured films from cellulose acetate(CA).This periodic structure was selected to scatter the light to increase its optical path.The mold features translated well to the patterned CA films,as shown by scanning electron microscopy and atomic force microscopy analyses.The films showed an average peak-to-peak distance of(750±40)nm and an average height of grooves of(130±7)nm.Optical characterization confirmed a high transparency(>90%)in the studied 300–800 nm range.These patterned cellulose films were applied atop dye solar cells to enhance light harvesting and improve device efficiency.The application of these films increased the average short-circuit current density by 17%±3%and efficiency by 18%±2%of the solar devices.Our results underscore that the easy and accessible NIL method can help develop patterned cellulose films for facile light-management patterning for optoelectronic device technologies.展开更多
Bioactive glass(BG)is a biomaterial capable of repairing,replacing,and regenerating body tissues,possessing the ability to form bonds between tissues and materials.The degradation products of BG can promote the genera...Bioactive glass(BG)is a biomaterial capable of repairing,replacing,and regenerating body tissues,possessing the ability to form bonds between tissues and materials.The degradation products of BG can promote the generation of growth factors,proliferation of cells,gene expressions of osteoblasts,and regeneration and repair of bone tissues.With the continuous development of materials science and technology,more and more evidence has shown the potential of BG in the development of bone materials.This article not only reviews preparation methods of BG(containing BG particles,BG porous materials,and BG-based composite hydrogels)and BG-based composites(such as BG/polymer,biometallic ions-doped BG,and non-metallic/BG),but also elaborates on their regenerative potential and comprehensive applications in bone repair.Meanwhile,the shortcomings of BG are pointed out,and the future application prospects of BG are also discussed,providing valuable guidance on the effective improvement of the BG performance for bone clinical applications in future.展开更多
Heavy metal ion(HMI)contamination threatens the environment’s integrity and human health,indicating the critical need for sensitive and reliable detection methods.The present review critically discusses the most rece...Heavy metal ion(HMI)contamination threatens the environment’s integrity and human health,indicating the critical need for sensitive and reliable detection methods.The present review critically discusses the most recent flexible and rigid sensor technologies for the detection of HMIs.Flexible sensors are heterogeneous in the following types:adaptability to different shapes,various environments,and realtime monitoring,which make them uniquely appropriate for applications in wearable devices,biomedical applications,and environmental monitoring systems.The nonflexible sensors perform well with great accuracy and sensitivity,especially in laboratory and industrial environments.Recent advances are focused on materials design,fabrication methodologies,and signal processing algorithms,which significantly improve sensor performance and help deploy sensors in complex real-world scenarios.Still,there are drawbacks to the need for more sensitivity,selectivity,durability,and scalability in developing sensors.Future directions for research should involve improvement in the design of materials to use multimodal sensing techniques and develop further miniaturizations and energy efficiency,as well as development of intelligent sensor networks and collaborative work in cross-disciplinary fields.This review can be an essential reference for the scientific and engineering communities focused on developing and applying flexible and non-flexible sensors to detect HMIs.展开更多
Fe-doped SrTiO_(3),SrTi_(1-x)Fe_(x)O_(3)(STFO,x=0.3,0.5,0.7),were prepared using the solid-state reaction method and their performances in photocatalytic dye degradation and supercapacitor applications were tested.STF...Fe-doped SrTiO_(3),SrTi_(1-x)Fe_(x)O_(3)(STFO,x=0.3,0.5,0.7),were prepared using the solid-state reaction method and their performances in photocatalytic dye degradation and supercapacitor applications were tested.STFO samples were characterized using XRD,EDX,and XPS to confirm its cubic perovskite structure and chemical compositions.The morphology and particle size were analyzed via SEM.UV-Vis spectroscopy reveal that Fe^(3+)could tune the bandgap and an optimized bandgap of 2.15 eV was found in STFO(x=0.5),which is suitable for visible photocatalysts.Raman spectra could characterize the longitudinal and transverse optical modes(LO and TO),which revealed the phonon vibration of STFOs.The decolorization efficiency of the MB dye is found to be 87.71%at 220 min under visible light.The decolorization kinetics was found to be of the pseudo-first-order type with the R2 value of 0.66 and the degradation rate constant of 0.02 min^(-1).STFO(x=0.7)was found to be the optimized supercapacitor material with the specific capacitance of 1028.45 F·g^(-1),energy density of 0.0073 W·h·kg^(-1),and power density of 22.74 W·kg^(-1)at the current density of 0.22 A·g^(-1).This study is anticipated to encourage exploring more potential lead-free perovskite materials with high dielectricity and low cost for photocatalytic and energy storage applications.展开更多
Herein,we report how the effective suppression of salting-out crystallization leads to the photocatalytic degradation of methyl orange as a bare dye and binary mixed form with methylene blue using the zinc ferrite/sil...Herein,we report how the effective suppression of salting-out crystallization leads to the photocatalytic degradation of methyl orange as a bare dye and binary mixed form with methylene blue using the zinc ferrite/silver/silver chloride(ZF/Ag/AgCl)nanocomposite.The work presents the first-time report of photocatalytic degradation of the mixed dye,comprising both anionic and cationic species,as a model industrial discharge using the ZF/Ag/AgCl nanocomposite.High-resolution transmission electron microscopy and Brunauer-Emmett-Teller surface area analysis are performed to validate the characteristics and suitability of samples.This study revealed the photocatalytic degradation of binary mixed dyes exposed under solar irradiation for 3.5 h with degradation efficiencies of 97.5%and 96%against anionic and cationic dyes,respectively,without the addition of any oxidizing agents,as well as efficient magnetic retrievability,recyclability,and stability of the sample,comparable with that against single and binary mixed dyes.The evaluation of the total organic carbon was also conducted to monitor the effective mineralization of the dye.Thus,the suitability of the sample as a magnetically retrievable and visible light-active photocatalyst for the degradation of toxic mixed dyes is explored.展开更多
Dimethylformamide(DMF)and polyvinylpyrrolidone(PVP)were chosen as precursors for the synthesis of a carbon-coated and fully nitrogen-doped Ni_(9)S_(8)/Ni_(3)S_(2)nanocomposite denoted as N-NiS-X,which was successfully...Dimethylformamide(DMF)and polyvinylpyrrolidone(PVP)were chosen as precursors for the synthesis of a carbon-coated and fully nitrogen-doped Ni_(9)S_(8)/Ni_(3)S_(2)nanocomposite denoted as N-NiS-X,which was successfully prepared through a simple oil bath chelation process followed by annealing.The N-NiS-2 electrode revealed optimal electrochemical performance with a sulfur addition of 18.6 mmol.The synthesized composite demonstrated a first-cycle discharge capacity of 1151.3 mAh·g^(-1)at 50 mA·g^(-1),with initial Coulombic efficiency measuring 64.4%.Following 500 cycles of galvanostatic charge–discharge testing at 0.5 A·g^(-1),this prepared electrode maintained 110.1%of its original capacity,which suggested superior kinetic characteristics during electrochemical processes.Electrochemical impedance analysis further demonstrated a reduction in the solution resistance and charge transfer resistance to 5.17 and 32.46Ω,respectively,highlighting enhanced charge transport capabilities.Consequently,the dual roles of in situ nitrogen doping and carbon coating,which effectively suppress the volume expansion effect of Ni_(x)S_(y),are realized by DMF and PVP as nitrogen and carbon sources,respectively.These functionalities markedly improve the structural integrity and electrical conductivity of materials,thereby highlighting their substantial prospects for commercial applications.展开更多
Calcium ion-crosslinked alginate hydrogels are widely used as a materials system for investigating cell behavior in 3D environments in vitro.Suspensions of calcium sulfate particles are often used as the source of Ca2...Calcium ion-crosslinked alginate hydrogels are widely used as a materials system for investigating cell behavior in 3D environments in vitro.Suspensions of calcium sulfate particles are often used as the source of Ca2+to control the rate of gelation.However,the instability of calcium sulfate suspensions can increase chances of reduced homogeneity of the resulting gel and requires researcher’s proficiency.Here,we show that ball-milled calcium sulfate microparticles(MPs)with smaller sizes can create more stable crosslinker suspensions than unprocessed or simply autoclaved calcium sulfate particles.In particular,15μm ball-milled calcium sulfate MPs result in gels that are more homogeneous with a balanced gelation rate,which facilitates fabrication of gels with consistent mechanical properties and reliable performance for 3D cell culture.Overall,these MPs represent an improved method for alginate hydrogel fabrication that can increase experimental reliability and quality for 3D cell culture.展开更多
Tetra-aminophenyl porphyrin(TAPP)-grafted Zn-Ag-In-S quantum dots(ZAIS QDs)/poly(maleic anhydride-alt-1-octadecene)(PMAO)nanoparticles were synthesized and their photoluminescence properties as well as photodynamic pr...Tetra-aminophenyl porphyrin(TAPP)-grafted Zn-Ag-In-S quantum dots(ZAIS QDs)/poly(maleic anhydride-alt-1-octadecene)(PMAO)nanoparticles were synthesized and their photoluminescence properties as well as photodynamic properties were studied.ZAIS QDs showed the brightest photoluminescence and highest quantum yield at an optimized Zn feeding molar ratio of 20%.Those TAPP-grafted nanoparticles(i.e.,ZAIS/PMAO-g-TAPP)were able to produce ^(1)O_(2) in aqueous solution under light irradiation as indicated by the ^(1)O_(2) indicator,9,10-anthracenediyl-bis(methylene)dimalonic acid(ADMA).ZAIS/PMAO-g-TAPP nanoparticles also demonstrate good biocompatibility and low dark toxicity even at a concentration as high as 2.8 mg·mL^(−1),whith can be applied as both a fluorescence probe and a photodynamic therapy(PDT)agent.The PDT treatment showed that the viability of melanoma A2058 cells was less than 10%after treatment with the 420 nm light irradiation for 15 min at a photosensitizer concentration of 1.7 mg·mL^(−1).During the PDT treatment with Escherichia coli,the survival rate of the bacteria decreased by~95%after light irradiation at the same concentration.Such dual-functional ZAIS/PMAO-g-TAPP nanoparticles researched in this study demonstrate promising potential for fluorescence labeling as well as effective PDT treatment against cancer cells and bacteria.展开更多
To address critical challenges of protein template denaturation caused by intense exothermicity and prolonged reaction time when using the traditional protein molecular imprinting technology,a novel imprinting strateg...To address critical challenges of protein template denaturation caused by intense exothermicity and prolonged reaction time when using the traditional protein molecular imprinting technology,a novel imprinting strategy was proposed.This study successfully achieved the rapid and controllable in-situ synthesis of polyacrylamide/calcium alginate(PAM/CaAlg)hydrogel films under near-ambient temperature conditions,employing a silver ions(Ag^(+))-catalyzed ammonium persulfate-sodium bisulfite redox system with acrylamide(AM)as the monomer,N,N′-methylenebisacrylamide(MBA)as the crosslinker,and bovine serum albumin(BSA)as the template.The optimized molecularly imprinted polymer(MIP)films demonstrated substantial enhancement of the BSA adsorption capacity following the removal of templates,reaching a maximum equilibrium adsorption capacity(Qe)of 50.4 mg·g-1 while maintaining a stable imprinting efficiency(IE)of 2.7.Competitive adsorption experiments verified the exceptional selectivity of MIP films towards the BSA recognition.Additionally,the incorporation of Ag^(+)ions endowed both MIP and nonimprinted polymer(NIP)films with remarkable antibacterial properties.This work establishes a straightforward and effective methodology for developing advanced protein-imprinted hydrogels that simultaneously exhibit high adsorption capacity,superior selectivity,and significant antibacterial activity.展开更多
For Authors As soon as an article is accepted for publication,authors will be requested to assign copyright of the article(or to grant exclusive publication and dissemination rights)to the publisher(respective the own...For Authors As soon as an article is accepted for publication,authors will be requested to assign copyright of the article(or to grant exclusive publication and dissemination rights)to the publisher(respective the owner if other than Springer Nature).This will ensure the widest possible protection and dissemination of information under copyright laws.展开更多
Graphene has attracted significant attention for its excellent electronic,mechanical,and thermal properties.However,its quality is strongly influenced by substrate crystal structure.Preparing graphene on non-metallic ...Graphene has attracted significant attention for its excellent electronic,mechanical,and thermal properties.However,its quality is strongly influenced by substrate crystal structure.Preparing graphene on non-metallic substrates,especially polycrystalline ones,remains challenging due to limited understanding of growth mechanisms and crystal face effects.This work reported the efficient growth of graphene films on polycrystalline aluminum nitride(AlN)substrates using the scanning electromagnetic induction(SEMI)technology and further investigated structural characteristics of graphene on different crystal planes of the substrate.Large-area and high-coverage graphene films were directly grown on c-and m-planes of AlN.Confocal SEM‒Raman analysis revealed the crystal plane-related interface coupling phenomenon:the 2D peak of graphene grown on the c-plane showed an obvious red shift to approximately 2684 cm-1,indicating stronger coupling and greater compressive strain at the interface between the c-plane AlN and graphene.This work provides a reliable method to in-situ investigate behaviors of graphene on various crystal facets.The results reveal characteristics of graphene on different AlN crystal planes,which is believed to provide important information for applications on graphene‒AlN devices.展开更多
基金the funding support from the National Natural Science Foundation of China(Grant No.22278404).
文摘Graphene materials like turbostratic graphene exhibit remarkable promise for an array of applications,spanning from electronic devices to aerospace technologies.It is essential to develop a fabrication method that is not only economical and efficient,but also environmentally sustainable.In this study,the molten salt-assisted magnesiothermic reduction(MSAMR)method is proposed for the synthesis of few-layer turbostratic graphene.K_(2)CO_(3)serves as both the carbon source and the catalyst for graphitization,facilitating the formation of the graphene structure,while in-situ generated MgO nanoparticles exert confinement and templating effects on the growth of graphene.The molten salts used effectively prevent the aggregation and the Bernal stacking of graphene sheets,ensuring the few-layer and turbostratic structure.The synergistic effects of K 2CO 3,in-situ generated MgO,and molten salts guarantee the formation of few-layer turbostratic graphene at a relatively low temperature,characterized with 4–8 stacking layers,a mesopore-dominated microstructure,and a high degree of graphitization.
基金support provided by National Key Research and Development Program of China:Key Materials Research of Non-metallic Flexible Risers for Deep Sea Mining(2022YFC2803702).
文摘The surface microstructure of continuous aramid fibers(AFs)is significant for AF/unsaturated polyester(UP)resin composites.The chemical modification of the AF surface is the key point to enhance mechanical properties of AF/UP composites.In this study,the polyethyleneimine(PEI)?polydopamine(PDA)coating was formed on the continuous AF surface via a one-step process.Morphologies and functional groups of PEI-PDA-coated AFs were studied.It was revealed that the interfacial bonding strength between PEI–PDA-AFs and the UP matrix was increased by 82.47%due to formation of the chemical bonding between amino groups on PEI and hydroxyl groups on UP.The tensile strength of the PEI–PDA-AF/UP composite reached 959.07 MPa,increased by 34.19%compared with that before modification.This study presents a simple and efficient method to prepare high-strength continuous AF/UP composites which could be used in engineering fields of deep-sea pipeline,aerospace,construction,military,safety,sports equipment,etc.
基金the support from the National Natural Science Foundation of China(52101215)the Natural Science Foundation of Liaoning Province,China(2024-BS-315).
文摘The surface engineering has been testified to be an effective strategy for optimizing oxygen evolution reaction(OER)activity.Nevertheless,many of these techniques involve complex and multiple synthesis process,which leads to potential safety hazards,raises the cost of production,and hinders the scaled-up application.Herein,a facile strategy(i.e.,quenching with lanthanum nitrate cold salt solution)was adopted to fabricate the surface of Co_(3)O_(4)grown on nickel foam,and boost the electrocatalytic performance for OER.Analyses of the experimental results show that the surface engineering strategy can induce many defects on the surface of Co_(3)O_(4),including microcracks and oxygen vacancies,which provides more active sites for electrochemical reaction.Consequently,the treated sample exhibits significantly improved OER electrocatalytic activity,requiring only 311 mV to deliver 100 mA·cm?2 for OER in alkaline solution.This work highlights the feasibility of designing advanced electrocatalysts towards OER via quenching and extends the use of quenching chemistry in catalysis.
基金the support from the National Natural Science Foundation of China(No.52202242)the Natural Science Foundation of Jiangsu Province(No.BK20230550)+4 种基金the National Science Foundation of the Jiangsu Higher Education Institutions of China(No.22KJB430002)the Jiangsu Provincial Senior Talent Program(Dengfeng)the Guangdong Basic and Applied Basic Research Foundation(Nos.2022A1515111067 and 2022A1515111017)the Start-up Fund of Jiangsu University(Nos.5501310015,5501310025,and 5501310013)the Ministry of Human Resources and Social Security of China(H20240006 and S20240318).
文摘Layered cobalt oxides are emerging as a pivotal class of cathode materials due to their high theoretical energy density,tunable interlayer spacing for efficient ion diffusion,and structural resilience under electrochemical cycling.Here,we report the synthesis of barium cobaltite(Ba_(x)CoO_(2),x≈0.34)through a two-step solid-state reaction coupled with ion exchange,establishing a stable layered structure consisting of alternating Ba?O layers and edge-shared CoO_(6)octahedral sheets.This unique architecture provides an expanded interlayer spacing(c-axis:1.23 nm)and efficient Li+diffusion channels,enabling a lithium-ion battery(LIB)with the Ba xCoO_(2)cathode to achieve ultrahigh reversible capacities of 820.7 mAh·g^(-1)at 0.1C and 483.2 mAh·g^(-1)at 5C,along with 99.37%Coulombic efficiency retained over 1000 cycles,demonstrating remarkable cycling stability.Comparative studies on a sodium-ion battery(SIB)also reveal the superior capacity of the LIB,attributed to smaller ionic radius of Li+and stabilized electrode–electrolyte interface.These results demonstrate that the combination of structural resilience and fast ion kinetics position Ba xCoO_(2)as a promising candidate for high-energy-density storage systems.Further optimization of the Ba/Co ratio and defect engineering may unlock enhanced cyclability for practical applications.
基金supported by the National Natural Science Foundation of China(32301177)the Cross-Discipline Foundation for Biomedical Materials in ZSTU(11113131282202-01 and 11113131282202-02)+1 种基金the Zhejiang Provincial Natural Science Foundation of China under Grant No.ZCLQ24C1001the Scientific Research Foundation of Zhejiang Sci-Tech University(22212238-Y).
文摘Reactive oxygen species(ROS)are highly prevalent in skin-related impairments and accelerate chronic ulcer progression.The routine subcutaneous administration approaches combining drug delivery with microenvironment intervention are widely developed for skin-related treatment but lack effective outcomes.Herein,we present a cuttlefish ink-derived nanoparticles(CNPs)-integrated microneedles patch,silk fibroin and cuttlefish ink-derived melanin nanoparticles(SC-MNs),that can easily be inserted into the skin and alleviate ROS.The microneedle tips,formed from silk fibroin and treated with methanol vapor annealing,turn to increasedβ-sheet and enhanced mechanical strength.Meanwhile,the tips can rapidly detach from SC-MNs in mildly acidic conditions due to the introduction of NaHCO_(3).SC-MNs also exhibited a unique ROS obliteration capacity.Furthermore,under near-infrared irradiation,SC-MNs triggered photothermal performance,which elicited reliable tumor cell-killing effects.Collectively,these SC-MN patches described here can provide a promising platform for combined ROS-scavenging and photothermal therapy,which makes them a potential candidate in skin-related disease management.
基金supported by the National Natural Science Foundation of China(Grant Nos.52173257 and 52372064)the Major Research Program of Jingdezhen Ceramic Industry(Grant No.2023ZDGG001)+1 种基金the Natural Science Foundation of Jiangxi Province(Grant Nos.20232ACB204011 and 20224BAB204001)the Opening Project of State Key Laboratory of New Ceramic Materials Tsinghua University(Grant Nos.KF202309 and KF202414).
文摘Constructing specific noble metal/metal–organic framework(MOF)nano-heterostructures is an effective strategy for promoting water electrolysis,yet remains highly challenging due to complex synthesis methods,difficulties in structural characterization,and the demanding nature of performance optimization.In this work,a heterojunction electrocatalyst was developed through growing Ru nanoparticles on NiFe-MOF nanosheets(NSs)supported by nickel foam(NF)using an easily accessible solvothermal method followed by an annealing strategy.Owing to the electronic interaction between Ru nanoparticles and NiFe-MOF NSs,the optimized Ru@NiFe-MOF/NF catalyst exhibits excellent bifunctional performance for the hydrogen evolution reaction(with an overpotential of 84 mV at 10 mA·cm^(-2))and the oxygen evolution reaction(with an overpotential of 240 mV at 10 mA·cm^(-2))in a 1.0 mol·L^(-1) KOH solution,which is superior to that of commercial catalysts.This study highlights a promising strategy for designing and developing efficient electrocatalysts for overall water electrolysis.
基金supported by the National Natural Science Foundation of China(Nos.42204083 and 42388101)the China Postdoctoral Science Foundation Funded Project(2022M713127)the Key Research Program of the Institute of Geology&Geophysics,CAS(IGGCAS-202201).
文摘Magnetic hyperthermia therapy(MHT)has emerged as a promising non-invasive approach for tumor treatment.However,the clinical translation of MHT has been significantly hampered by two critical challenges:insufficient magnetothermal conversion efficiency and compromised biosecurity of conventional magnetic nanoparticles.Addressing these limitations,we developed an innovative biomimetic synthesis strategy by engineering cobalt-doped magnetoferritins(PcFn-Co-x)within recombinant hyperthermophilic archaeon ferritin(PcFn)cages at a precisely controlled biomineralization temperature of 90℃.This breakthrough approach yielded monodisperse PcFn-Co-x nanoparticles with core sizes(13.3?19.6 nm)that remarkably surpass the conventional size limitations of ferritin inner cages.The optimized PcFn-Co-5 nanoparticles demonstrated unprecedented magnetothermal performance,achieving a record-high specific absorption rate(SAR)of 910 W·g^(-1) under biologically safe excitation conditions(33 kA·m?1 and 150 kHz).Magnetic characterization revealed that the cobalt doping significantly modulates the magnetic energy barrier by enhancing coercivity and magnetic anisotropy,with SAR values showing a remarkable positive correlation with these magnetic parameters.This work presents a novel paradigm for the biomimetic synthesis of high-performance magnetoferritins and pave the way for their clinical application in MHT.
基金the financial support from the National Natural Science Foundation of China(Grant No.22278431).
文摘In the heterogeneous electro-Fenton(Hetero-EF)process,the generation and activation efficiency of hydrogen peroxide(H_(2)O_(2))is an important factor affecting the performance.Based on ability of Mxene to regulate charge density at metal active sites and enhance electronic transport efficiency,a nanoflower-shaped CoSe and plate-shaped Ti_(3)C_(2) composite(CoSe/Ti_(3)C_(2))was developed for use as a Hetero-EF cathode catalyst.The results showed that CoSe/Ti_(3)C_(2) had excellent degradation performance,with a sulfamerazine(SMR)(10 mg·L^(-1))degradation efficiency of 100%within 80 min in the pH range of 3–7.CoSe/Ti_(3)C_(2)(n=2.59)had a lower transfer electron number compared to that of CoSe(n=3.21)and was more inclined towards 2e-ORR.Theoretical calculations showed that Ti_(3)C_(2) regulated the d-band center of CoSe,weakening adsorption strength of Co sites for the*OOH intermediate and making it more inclined to generate H_(2)O_(2).Electron paramagnetic resonance(EPR)and quenching experiments indicated the presence of*OH,*O_(2)^(-),and 1O_(2)in the system,all of which participated in the degradation of pollutants.The construction of a multi reactive oxygen species system enhanced the interference resistance during degradation.
文摘In the original version,Fig.5(f)is misused because it is identical to Fig.5(e).Figure 5 after correction is shown below:The authors apologize for any confusion.
基金the Academy of Finland’s Flagship Program under Projects Nos.318890 and 318891(Competence Center for Materials Bioeconomy,FinnCERES).M.E.,J.V.,and K.M.acknowledge the Academy of Finland projects“SUSTAINABLE”and BioEST(Decision numbers 334818,334819,336577,and 336441)for funding.M.E.also thanks the Graduate School of the University of Turku.We acknowledge the use of UTU’s Materials Research Infrastructure(MARI).
文摘Advanced materials with surface patterning can improve light management in optoelectronic devices.In this work,we employed nanoimprinting lithography(NIL)using a hard polydimethylsiloxane(PDMS)mold to fabricate two-dimensional periodically structured films from cellulose acetate(CA).This periodic structure was selected to scatter the light to increase its optical path.The mold features translated well to the patterned CA films,as shown by scanning electron microscopy and atomic force microscopy analyses.The films showed an average peak-to-peak distance of(750±40)nm and an average height of grooves of(130±7)nm.Optical characterization confirmed a high transparency(>90%)in the studied 300–800 nm range.These patterned cellulose films were applied atop dye solar cells to enhance light harvesting and improve device efficiency.The application of these films increased the average short-circuit current density by 17%±3%and efficiency by 18%±2%of the solar devices.Our results underscore that the easy and accessible NIL method can help develop patterned cellulose films for facile light-management patterning for optoelectronic device technologies.
基金support from the Natural Science Foundation of Hunan Province(2025JJ50076)the Scientific Research Fund of Hunan Provincial Education Department(24A0063).
文摘Bioactive glass(BG)is a biomaterial capable of repairing,replacing,and regenerating body tissues,possessing the ability to form bonds between tissues and materials.The degradation products of BG can promote the generation of growth factors,proliferation of cells,gene expressions of osteoblasts,and regeneration and repair of bone tissues.With the continuous development of materials science and technology,more and more evidence has shown the potential of BG in the development of bone materials.This article not only reviews preparation methods of BG(containing BG particles,BG porous materials,and BG-based composite hydrogels)and BG-based composites(such as BG/polymer,biometallic ions-doped BG,and non-metallic/BG),but also elaborates on their regenerative potential and comprehensive applications in bone repair.Meanwhile,the shortcomings of BG are pointed out,and the future application prospects of BG are also discussed,providing valuable guidance on the effective improvement of the BG performance for bone clinical applications in future.
基金supporting the project titled Design and Development of MEMS-based Portable Platform with Ion-Selective Self-Assembled Monolayer(SAMs)for the Detection of Toxic Heavy Metal Ions(HMIs)in Ground Water"(DST/TDT/DDP-60/2021).
文摘Heavy metal ion(HMI)contamination threatens the environment’s integrity and human health,indicating the critical need for sensitive and reliable detection methods.The present review critically discusses the most recent flexible and rigid sensor technologies for the detection of HMIs.Flexible sensors are heterogeneous in the following types:adaptability to different shapes,various environments,and realtime monitoring,which make them uniquely appropriate for applications in wearable devices,biomedical applications,and environmental monitoring systems.The nonflexible sensors perform well with great accuracy and sensitivity,especially in laboratory and industrial environments.Recent advances are focused on materials design,fabrication methodologies,and signal processing algorithms,which significantly improve sensor performance and help deploy sensors in complex real-world scenarios.Still,there are drawbacks to the need for more sensitivity,selectivity,durability,and scalability in developing sensors.Future directions for research should involve improvement in the design of materials to use multimodal sensing techniques and develop further miniaturizations and energy efficiency,as well as development of intelligent sensor networks and collaborative work in cross-disciplinary fields.This review can be an essential reference for the scientific and engineering communities focused on developing and applying flexible and non-flexible sensors to detect HMIs.
基金acknowledge SERB project(No.EMR/2016/004219,SIR/2022/001615)UGC-DAE-CSR project(No.CRS/2023-24/01/1031)IIT,Patna for providing the XRD facility,DepartmentofNanotechnology,NEHU forproviding electrochemical studyfacilities。
文摘Fe-doped SrTiO_(3),SrTi_(1-x)Fe_(x)O_(3)(STFO,x=0.3,0.5,0.7),were prepared using the solid-state reaction method and their performances in photocatalytic dye degradation and supercapacitor applications were tested.STFO samples were characterized using XRD,EDX,and XPS to confirm its cubic perovskite structure and chemical compositions.The morphology and particle size were analyzed via SEM.UV-Vis spectroscopy reveal that Fe^(3+)could tune the bandgap and an optimized bandgap of 2.15 eV was found in STFO(x=0.5),which is suitable for visible photocatalysts.Raman spectra could characterize the longitudinal and transverse optical modes(LO and TO),which revealed the phonon vibration of STFOs.The decolorization efficiency of the MB dye is found to be 87.71%at 220 min under visible light.The decolorization kinetics was found to be of the pseudo-first-order type with the R2 value of 0.66 and the degradation rate constant of 0.02 min^(-1).STFO(x=0.7)was found to be the optimized supercapacitor material with the specific capacitance of 1028.45 F·g^(-1),energy density of 0.0073 W·h·kg^(-1),and power density of 22.74 W·kg^(-1)at the current density of 0.22 A·g^(-1).This study is anticipated to encourage exploring more potential lead-free perovskite materials with high dielectricity and low cost for photocatalytic and energy storage applications.
文摘Herein,we report how the effective suppression of salting-out crystallization leads to the photocatalytic degradation of methyl orange as a bare dye and binary mixed form with methylene blue using the zinc ferrite/silver/silver chloride(ZF/Ag/AgCl)nanocomposite.The work presents the first-time report of photocatalytic degradation of the mixed dye,comprising both anionic and cationic species,as a model industrial discharge using the ZF/Ag/AgCl nanocomposite.High-resolution transmission electron microscopy and Brunauer-Emmett-Teller surface area analysis are performed to validate the characteristics and suitability of samples.This study revealed the photocatalytic degradation of binary mixed dyes exposed under solar irradiation for 3.5 h with degradation efficiencies of 97.5%and 96%against anionic and cationic dyes,respectively,without the addition of any oxidizing agents,as well as efficient magnetic retrievability,recyclability,and stability of the sample,comparable with that against single and binary mixed dyes.The evaluation of the total organic carbon was also conducted to monitor the effective mineralization of the dye.Thus,the suitability of the sample as a magnetically retrievable and visible light-active photocatalyst for the degradation of toxic mixed dyes is explored.
基金support from Key Research and Development Project of Datong(2023003 and 2024011)Basic Research Project Fund of Shanxi Datong University(2022K10 and 2022K11).
文摘Dimethylformamide(DMF)and polyvinylpyrrolidone(PVP)were chosen as precursors for the synthesis of a carbon-coated and fully nitrogen-doped Ni_(9)S_(8)/Ni_(3)S_(2)nanocomposite denoted as N-NiS-X,which was successfully prepared through a simple oil bath chelation process followed by annealing.The N-NiS-2 electrode revealed optimal electrochemical performance with a sulfur addition of 18.6 mmol.The synthesized composite demonstrated a first-cycle discharge capacity of 1151.3 mAh·g^(-1)at 50 mA·g^(-1),with initial Coulombic efficiency measuring 64.4%.Following 500 cycles of galvanostatic charge–discharge testing at 0.5 A·g^(-1),this prepared electrode maintained 110.1%of its original capacity,which suggested superior kinetic characteristics during electrochemical processes.Electrochemical impedance analysis further demonstrated a reduction in the solution resistance and charge transfer resistance to 5.17 and 32.46Ω,respectively,highlighting enhanced charge transport capabilities.Consequently,the dual roles of in situ nitrogen doping and carbon coating,which effectively suppress the volume expansion effect of Ni_(x)S_(y),are realized by DMF and PVP as nitrogen and carbon sources,respectively.These functionalities markedly improve the structural integrity and electrical conductivity of materials,thereby highlighting their substantial prospects for commercial applications.
基金supported by the National Institute on Aging of the National Institutes of Health under Award Number R03AG073834the National Heart,Lung,and Blood Institute of the National Institutes of Health under Award Number R56HL169764+1 种基金the Air Force Office of Scientific Research award FA9550-24-1-0286the Maryland Stem Cell Research Fund 2024-MSCRFL-6272.
文摘Calcium ion-crosslinked alginate hydrogels are widely used as a materials system for investigating cell behavior in 3D environments in vitro.Suspensions of calcium sulfate particles are often used as the source of Ca2+to control the rate of gelation.However,the instability of calcium sulfate suspensions can increase chances of reduced homogeneity of the resulting gel and requires researcher’s proficiency.Here,we show that ball-milled calcium sulfate microparticles(MPs)with smaller sizes can create more stable crosslinker suspensions than unprocessed or simply autoclaved calcium sulfate particles.In particular,15μm ball-milled calcium sulfate MPs result in gels that are more homogeneous with a balanced gelation rate,which facilitates fabrication of gels with consistent mechanical properties and reliable performance for 3D cell culture.Overall,these MPs represent an improved method for alginate hydrogel fabrication that can increase experimental reliability and quality for 3D cell culture.
基金supported by the Top-Notch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)the CZ-EdU Joint Laboratory on Biomedical Materials(CZ20190019).
文摘Tetra-aminophenyl porphyrin(TAPP)-grafted Zn-Ag-In-S quantum dots(ZAIS QDs)/poly(maleic anhydride-alt-1-octadecene)(PMAO)nanoparticles were synthesized and their photoluminescence properties as well as photodynamic properties were studied.ZAIS QDs showed the brightest photoluminescence and highest quantum yield at an optimized Zn feeding molar ratio of 20%.Those TAPP-grafted nanoparticles(i.e.,ZAIS/PMAO-g-TAPP)were able to produce ^(1)O_(2) in aqueous solution under light irradiation as indicated by the ^(1)O_(2) indicator,9,10-anthracenediyl-bis(methylene)dimalonic acid(ADMA).ZAIS/PMAO-g-TAPP nanoparticles also demonstrate good biocompatibility and low dark toxicity even at a concentration as high as 2.8 mg·mL^(−1),whith can be applied as both a fluorescence probe and a photodynamic therapy(PDT)agent.The PDT treatment showed that the viability of melanoma A2058 cells was less than 10%after treatment with the 420 nm light irradiation for 15 min at a photosensitizer concentration of 1.7 mg·mL^(−1).During the PDT treatment with Escherichia coli,the survival rate of the bacteria decreased by~95%after light irradiation at the same concentration.Such dual-functional ZAIS/PMAO-g-TAPP nanoparticles researched in this study demonstrate promising potential for fluorescence labeling as well as effective PDT treatment against cancer cells and bacteria.
基金supported by the project of open bidding for selecting the best candidates in Tianjin Institute of Acupuncture and Moxibustion,and the National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion(ZJJBGS2024002-2).
文摘To address critical challenges of protein template denaturation caused by intense exothermicity and prolonged reaction time when using the traditional protein molecular imprinting technology,a novel imprinting strategy was proposed.This study successfully achieved the rapid and controllable in-situ synthesis of polyacrylamide/calcium alginate(PAM/CaAlg)hydrogel films under near-ambient temperature conditions,employing a silver ions(Ag^(+))-catalyzed ammonium persulfate-sodium bisulfite redox system with acrylamide(AM)as the monomer,N,N′-methylenebisacrylamide(MBA)as the crosslinker,and bovine serum albumin(BSA)as the template.The optimized molecularly imprinted polymer(MIP)films demonstrated substantial enhancement of the BSA adsorption capacity following the removal of templates,reaching a maximum equilibrium adsorption capacity(Qe)of 50.4 mg·g-1 while maintaining a stable imprinting efficiency(IE)of 2.7.Competitive adsorption experiments verified the exceptional selectivity of MIP films towards the BSA recognition.Additionally,the incorporation of Ag^(+)ions endowed both MIP and nonimprinted polymer(NIP)films with remarkable antibacterial properties.This work establishes a straightforward and effective methodology for developing advanced protein-imprinted hydrogels that simultaneously exhibit high adsorption capacity,superior selectivity,and significant antibacterial activity.
文摘For Authors As soon as an article is accepted for publication,authors will be requested to assign copyright of the article(or to grant exclusive publication and dissemination rights)to the publisher(respective the owner if other than Springer Nature).This will ensure the widest possible protection and dissemination of information under copyright laws.
基金supported by the National Natural Science Foundation of China(Nos.22201086,22471084,92261204,and 22431005)the Hubei Provincial Science and Technology Innovation Team Project.J.W.also express gratitude to the Zhongke Technology Achievement Transfer and Transformation Center of Henan Province for their support through the Open Project—Ultrafast Quenching Preparation and Application Research of Graphene Functionalized Ceramics(2024141).
文摘Graphene has attracted significant attention for its excellent electronic,mechanical,and thermal properties.However,its quality is strongly influenced by substrate crystal structure.Preparing graphene on non-metallic substrates,especially polycrystalline ones,remains challenging due to limited understanding of growth mechanisms and crystal face effects.This work reported the efficient growth of graphene films on polycrystalline aluminum nitride(AlN)substrates using the scanning electromagnetic induction(SEMI)technology and further investigated structural characteristics of graphene on different crystal planes of the substrate.Large-area and high-coverage graphene films were directly grown on c-and m-planes of AlN.Confocal SEM‒Raman analysis revealed the crystal plane-related interface coupling phenomenon:the 2D peak of graphene grown on the c-plane showed an obvious red shift to approximately 2684 cm-1,indicating stronger coupling and greater compressive strain at the interface between the c-plane AlN and graphene.This work provides a reliable method to in-situ investigate behaviors of graphene on various crystal facets.The results reveal characteristics of graphene on different AlN crystal planes,which is believed to provide important information for applications on graphene‒AlN devices.
