Layered double hydroxide(LDH)with special layered structure has been proved to have excellent hole transport capacity and good stability.Herein,we report a high efficient composite photocatalyst of CoAlLDH and BiPO4pr...Layered double hydroxide(LDH)with special layered structure has been proved to have excellent hole transport capacity and good stability.Herein,we report a high efficient composite photocatalyst of CoAlLDH and BiPO4prepared by hydrothermal and che mical adsorption(denoted as CoAl-LDH/BiPO_(4)).Phenol can be entirely degraded by 1%CoAl-LDH/BiPO_(4)under 30 min ultraviolet(UV)light irradiation,and the degradation rate constants k are 3 times and 39 times higher than that of pure BiPO_(4)and CoAl-LDH,respectively.The enhanced photocatalytic activity can be attributed to effective holes transfer from BiPO4to CoAl-LDH,which hinders the recombination of photo genera ted charge carriers.In addition,the combination of BiPO4and CoAl-LDH avoids the agglomeration of BiPO4and improves the stability of BiPO_(4).Active species capture experiments indicate that superoxide radicals(·O-_(2))are the main active species responsible for the degradation of phenol.This work provides technical approaches and research ideas for solving the photogenerated charge carrier recombination problem of photocatalyst.展开更多
Defect engineering has been demonstrated to be an appealing strategy to boost the photocatalytic activity of materials.However,can higher defect concentration bring about higher photocatalytic activity?This is an open...Defect engineering has been demonstrated to be an appealing strategy to boost the photocatalytic activity of materials.However,can higher defect concentration bring about higher photocatalytic activity?This is an open question.In this work,BiPO_(4)photocatalysts with controllable oxygen vacancy concentrations were successfully synthesized.The photocatalytic activity of the obtained BiPO_(4)photocatalysts was determined by the removal of ciprofloxacin and 4-chlorophenol,as well as CO_(2)photoreduction.The BiPO4materials with lower oxygen vacancy concentration could display unexpected higher photocatalytic efficiency.Through the investigation of different factors which may affect the photocatalytic performance,such as crystal structure,morphology,specific surface area,defect,and energy band structure,it can be found that the energy band structure difference was responsible for the enhanced photocatalytic activity.展开更多
In this perspective,we have highlighted the current literature and explained the synthesis,structure,morphology,modification strategies,and photocatalytic applications of emerging BiPO_(4)-based photocatalysts.Since B...In this perspective,we have highlighted the current literature and explained the synthesis,structure,morphology,modification strategies,and photocatalytic applications of emerging BiPO_(4)-based photocatalysts.Since BiPO_(4)is a large bandgap photocatalyst,it uses UV light for the excitation of electrons,and also,the recombination of charge carriers is an issue in BiPO_(4).Various novel modification strategies of BiPO_(4)photocatalysts viz.defect modifications,heterojunction formation,phase-junctions,surface plasmon resonance,Schottky junction have been successfully proposed and highlighted.These modifications enhance the light absorption and inhibit the recombination of charge carriers BiPO_(4)photocatalyst.Finally,future aspects for further research on BiPO_(4)-based photocatalysts are also explored.It expects that BiPO_(4)-based photocatalysts represent a promising strategy for developing practical photocatalysts for energy and environmental remediation applications.展开更多
基金supported by the National Key Research and Development Program of China [2019YFC1904500]National Natural Science Foundation of China [52270115, 21878331, 21777080]Science Foundation of China University of Petroleum, Beijing [2462019QNXZ05, 2462020YXZZ018]
文摘Layered double hydroxide(LDH)with special layered structure has been proved to have excellent hole transport capacity and good stability.Herein,we report a high efficient composite photocatalyst of CoAlLDH and BiPO4prepared by hydrothermal and che mical adsorption(denoted as CoAl-LDH/BiPO_(4)).Phenol can be entirely degraded by 1%CoAl-LDH/BiPO_(4)under 30 min ultraviolet(UV)light irradiation,and the degradation rate constants k are 3 times and 39 times higher than that of pure BiPO_(4)and CoAl-LDH,respectively.The enhanced photocatalytic activity can be attributed to effective holes transfer from BiPO4to CoAl-LDH,which hinders the recombination of photo genera ted charge carriers.In addition,the combination of BiPO4and CoAl-LDH avoids the agglomeration of BiPO4and improves the stability of BiPO_(4).Active species capture experiments indicate that superoxide radicals(·O-_(2))are the main active species responsible for the degradation of phenol.This work provides technical approaches and research ideas for solving the photogenerated charge carrier recombination problem of photocatalyst.
基金financially supported by the National Natural Science Foundation of China(No.22002014)the Funding for scientific research startup of Jiangsu University(No.20JDG15)+1 种基金Fundamental Research Funds for the Central Universities(No.30922010302)Start-Up Grant(No.AE89991/397)from Nanjing University of Science and Technology。
文摘Defect engineering has been demonstrated to be an appealing strategy to boost the photocatalytic activity of materials.However,can higher defect concentration bring about higher photocatalytic activity?This is an open question.In this work,BiPO_(4)photocatalysts with controllable oxygen vacancy concentrations were successfully synthesized.The photocatalytic activity of the obtained BiPO_(4)photocatalysts was determined by the removal of ciprofloxacin and 4-chlorophenol,as well as CO_(2)photoreduction.The BiPO4materials with lower oxygen vacancy concentration could display unexpected higher photocatalytic efficiency.Through the investigation of different factors which may affect the photocatalytic performance,such as crystal structure,morphology,specific surface area,defect,and energy band structure,it can be found that the energy band structure difference was responsible for the enhanced photocatalytic activity.
基金supported by Brain Pool Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(no.2020H1D3A1A04081409)。
文摘In this perspective,we have highlighted the current literature and explained the synthesis,structure,morphology,modification strategies,and photocatalytic applications of emerging BiPO_(4)-based photocatalysts.Since BiPO_(4)is a large bandgap photocatalyst,it uses UV light for the excitation of electrons,and also,the recombination of charge carriers is an issue in BiPO_(4).Various novel modification strategies of BiPO_(4)photocatalysts viz.defect modifications,heterojunction formation,phase-junctions,surface plasmon resonance,Schottky junction have been successfully proposed and highlighted.These modifications enhance the light absorption and inhibit the recombination of charge carriers BiPO_(4)photocatalyst.Finally,future aspects for further research on BiPO_(4)-based photocatalysts are also explored.It expects that BiPO_(4)-based photocatalysts represent a promising strategy for developing practical photocatalysts for energy and environmental remediation applications.
