Electrochemical water splitting is a surface-sensitive process,in which the performance of the catalyst is highly dependent upon its surface properties.Rational design of the interfacial microenvironment of electrocat...Electrochemical water splitting is a surface-sensitive process,in which the performance of the catalyst is highly dependent upon its surface properties.Rational design of the interfacial microenvironment of electrocatalysts can substantially enhance the efficiency of water splitting.This review briefly summarizes the advances in the design strategies in catalyst for the modification of interfacial microenvironment from three perspectives:the construction of special structures,modification by cationic and anionic doping,and functionalization with organic molecules.These strategies effectively regulate the electronic structure of electrocatalysts,optimize the binding energy of reaction intermediates,and improve the local microenvironment surrounding the active sites.Moreover,they facilitate the rapid transfer of reactants and products while enhancing the stability and durability of the catalysts.Finally,this review discusses the key challenges currently faced in this field and proposes corresponding solutions,providing references for future research directions.展开更多
A facile,fluorine-free approach for synthesizing vertically aligned arrays of mesocrystaUine anatase TiO_(2) nanosheets with highly exposed{001}facets was developed through topotactic transformation.Unique mesocrystal...A facile,fluorine-free approach for synthesizing vertically aligned arrays of mesocrystaUine anatase TiO_(2) nanosheets with highly exposed{001}facets was developed through topotactic transformation.Unique mesocrystalline{001}-faceted TiO_(2) nanosheet arrays vertically aligned on conductive fluorine-doped tin oxide glass were realized through topotactic conversion from single-crystalline precursor nanosheet arrays based on lattice matching between the precursor and the anatase crystals.The morphology and microstructure of the{001}-faceted TiO_(2) nanosheets could be readily modulated by changing the reactant concentration and annealing temperature.Owing to enhanced dye adsorption,reduced charge recombination,and enhanced light scattering arising from the exposed{001}facets,in addition to the advantageous features of low-dimensional structure arrays(e.g.,fast electron transport and efficient charge collection),the obtained TiO_(2) nanosheet arrays exhibited superior performance when they were used as anodes for dye-sensitized solar cells(DSSCs).Particularly,{001}-faceted TiO_(2) nanosheet arrays-15μm long annealed at 500℃showed a power conversion efficiency of 7.51%.Furthermore,a remarkable efficiency of 8.85%was achieved for a DSSC based on doubleqayered TiO_(2) nanosheet arrays-35μm long,which were prepared by conversion from the precursor nanoarrays produced via secondary hydrothermal growth.展开更多
Chiral catalysis is one of the most direct and effective approach to obtain pure optical enantiomers.Chiral carbon dots(CDs)as carbon-based chiral catalysts show great potential in chiral catalysis.Herein,we report a ...Chiral catalysis is one of the most direct and effective approach to obtain pure optical enantiomers.Chiral carbon dots(CDs)as carbon-based chiral catalysts show great potential in chiral catalysis.Herein,we report a facile one step base-catalyzed aldol condensation to fabricate the chiral CDs from glucose at ambient temperature and pressure.The formation of chiral CDs involves the processes of isomerization and aldol condensation.These chiral CDs have been demonstrated that they have selective capacity for electrocatalytic oxidization of tryptophan enantiomers.L type of CDs(LCDs)is more likely to catalyze L-tryptophan(Trp)than D-Trp with the selective factor(I_(L)/I_(D))of 1.60,whereas the D type of CDs(DCDs)tends to catalyze D-Trp(I_(L)/I_(D):0.63).Theoretical calculations combined with various contrast experiments(temperature and pH)demonstrate that the selectively electrocatalytic capacity of chiral CDs toward Trp isomers is due to the different hydrogen-bond interactions between chiral CDs and Trp.展开更多
Attention deficit hyperactivity disorder(ADHD)is one of the most prevalent psychiatric disorders in children,and ADHD patients always display circadian abnormalities.While,the ADHD drugs currently used in clinic have ...Attention deficit hyperactivity disorder(ADHD)is one of the most prevalent psychiatric disorders in children,and ADHD patients always display circadian abnormalities.While,the ADHD drugs currently used in clinic have strong side effects,such as psychosis,allergic reactions,and heart problems.Here,we demonstrated carbon dots derived from the ascorbic acid(VCDs)could strongly rescue the hyperactive and impulsive behaviour of a zebrafish ADHD disease model caused by per1b mutation.VCDs prolonged the circadian period of zebrafish for more than half an hour.In addition,the amplitude and circadian phase were also changed.The dopamine level was specifically increased,which may be caused by stimulation of the dopaminergic neuron development in the midbrain.Notably,it was found that the serotonin level was not altered by VCDs treatments.Also,the gene transcriptome effects of VCDs were discussed in present work.Our results provided the dynamic interactions of carbon dots with circadian system and dopamine signaling pathway,which illustrates a potential application of degradable and bio-safe VCDs for the treatment of the attention deficient and hyperactive disorder through circadian intervention.展开更多
基金supported by Hebei Natural Science Foundation(No.B2024105008)the Beijing Institute of Technology Research Fund Program for Young Scholarsthe National Natural Science Foundation of China(No.21805299).
文摘Electrochemical water splitting is a surface-sensitive process,in which the performance of the catalyst is highly dependent upon its surface properties.Rational design of the interfacial microenvironment of electrocatalysts can substantially enhance the efficiency of water splitting.This review briefly summarizes the advances in the design strategies in catalyst for the modification of interfacial microenvironment from three perspectives:the construction of special structures,modification by cationic and anionic doping,and functionalization with organic molecules.These strategies effectively regulate the electronic structure of electrocatalysts,optimize the binding energy of reaction intermediates,and improve the local microenvironment surrounding the active sites.Moreover,they facilitate the rapid transfer of reactants and products while enhancing the stability and durability of the catalysts.Finally,this review discusses the key challenges currently faced in this field and proposes corresponding solutions,providing references for future research directions.
基金This work was supported by the National Natural Science Foundation of China(Nos.21473004 and 21673007)the National Basic Research Program of China(No.2013CB932601).
文摘A facile,fluorine-free approach for synthesizing vertically aligned arrays of mesocrystaUine anatase TiO_(2) nanosheets with highly exposed{001}facets was developed through topotactic transformation.Unique mesocrystalline{001}-faceted TiO_(2) nanosheet arrays vertically aligned on conductive fluorine-doped tin oxide glass were realized through topotactic conversion from single-crystalline precursor nanosheet arrays based on lattice matching between the precursor and the anatase crystals.The morphology and microstructure of the{001}-faceted TiO_(2) nanosheets could be readily modulated by changing the reactant concentration and annealing temperature.Owing to enhanced dye adsorption,reduced charge recombination,and enhanced light scattering arising from the exposed{001}facets,in addition to the advantageous features of low-dimensional structure arrays(e.g.,fast electron transport and efficient charge collection),the obtained TiO_(2) nanosheet arrays exhibited superior performance when they were used as anodes for dye-sensitized solar cells(DSSCs).Particularly,{001}-faceted TiO_(2) nanosheet arrays-15μm long annealed at 500℃showed a power conversion efficiency of 7.51%.Furthermore,a remarkable efficiency of 8.85%was achieved for a DSSC based on doubleqayered TiO_(2) nanosheet arrays-35μm long,which were prepared by conversion from the precursor nanoarrays produced via secondary hydrothermal growth.
基金This work is supported by Natural Science Foundation of Jiangsu Province(No.BE2022425)National Key R&D Program of China(Nos.2020YFA0406104 and 2020YFA0406101)+8 种基金National MCF Energy R&D Program of China(No.2018YFE0306105)the National Natural Science Foundation of China(Nos.52271223,52272043,51725204,51972216,52202107,and 52201269)Innovative Research Group Project of the National Natural Science Foundation of China(No.51821002)Key R&D program of Ningxia Hui Autonomous Region(No.2022BEG02006)Ningxia Autonomous Region flexible introduction of science and technology innovation team(No.2021RXTDLX08)Agricultural science and technology innovation project of Suzhou Science and Technology Development Plan(No.SNG2020074)Macao Youths Scholars Program,Collaborative Innovation Center of Suzhou Nano Science and Technologythe 111 ProjectSuzhou Key Laboratory of Functional Nano and Soft Materials.
文摘Chiral catalysis is one of the most direct and effective approach to obtain pure optical enantiomers.Chiral carbon dots(CDs)as carbon-based chiral catalysts show great potential in chiral catalysis.Herein,we report a facile one step base-catalyzed aldol condensation to fabricate the chiral CDs from glucose at ambient temperature and pressure.The formation of chiral CDs involves the processes of isomerization and aldol condensation.These chiral CDs have been demonstrated that they have selective capacity for electrocatalytic oxidization of tryptophan enantiomers.L type of CDs(LCDs)is more likely to catalyze L-tryptophan(Trp)than D-Trp with the selective factor(I_(L)/I_(D))of 1.60,whereas the D type of CDs(DCDs)tends to catalyze D-Trp(I_(L)/I_(D):0.63).Theoretical calculations combined with various contrast experiments(temperature and pH)demonstrate that the selectively electrocatalytic capacity of chiral CDs toward Trp isomers is due to the different hydrogen-bond interactions between chiral CDs and Trp.
基金the National Natural Science Foundation of China(Nos.31671216,81871193,51725204,21771132,51972216,and 52041202)the National MCF Energy R&D Program of China(No.2018YFE0306105)+8 种基金the National Key R&D Program of China(Nos.2020YFA0406104 and 2020YFA0406101)Innovative Research Group Project of the National Natural Science Foundation of China(No.51821002)Natural Science Foundation of Jiangsu Province(No.BK20190041)National College Students Innovation and Entrepreneurship Training Program(No.201710285042Z)Suzhou Scientific Program(No.SS202074)Key R&D program of Ningxia Hui Autonomous Region(No.2022BEG02006)Ningxia Autonomous Region flexible introduction of science and technology innovation team(No.2021RXTDLX08)Agricultural science and technology innovation project of Suzhou Science and Technology Development Plan(No.SNG2020074)Collaborative Innovation Center of Suzhou Nano Science&Technology,the 111 Project,and Suzhou Key Laboratory of Functional Nano&Soft Materials.
文摘Attention deficit hyperactivity disorder(ADHD)is one of the most prevalent psychiatric disorders in children,and ADHD patients always display circadian abnormalities.While,the ADHD drugs currently used in clinic have strong side effects,such as psychosis,allergic reactions,and heart problems.Here,we demonstrated carbon dots derived from the ascorbic acid(VCDs)could strongly rescue the hyperactive and impulsive behaviour of a zebrafish ADHD disease model caused by per1b mutation.VCDs prolonged the circadian period of zebrafish for more than half an hour.In addition,the amplitude and circadian phase were also changed.The dopamine level was specifically increased,which may be caused by stimulation of the dopaminergic neuron development in the midbrain.Notably,it was found that the serotonin level was not altered by VCDs treatments.Also,the gene transcriptome effects of VCDs were discussed in present work.Our results provided the dynamic interactions of carbon dots with circadian system and dopamine signaling pathway,which illustrates a potential application of degradable and bio-safe VCDs for the treatment of the attention deficient and hyperactive disorder through circadian intervention.
