Co-doping of metal ions in semiconductor photocatalysts is a promising strategy to promote photocatalytic activity due to its expected synergistic effects.In this study,we demonstrated the first synthesis of uniform F...Co-doping of metal ions in semiconductor photocatalysts is a promising strategy to promote photocatalytic activity due to its expected synergistic effects.In this study,we demonstrated the first synthesis of uniform Fe and Mo co-doped BiVO_(4)(Fe/Mo-BVO)porous nanoshuttles(PNSs)through a simple solvothermal method combined with a subsequent impregnation thermal treatment.It has been discovered that the incorporation of Fe and Mo into the BVO lattice not only influences the shuttle-like morphology and porous structure but also modifies the band structure of the pristine BVO;this consequently boosts the photocatalytic performance of BVO.The as-prepared Fe/Mo-BVO PNSs exhibit significantly enhanced photoactivity for water oxidation under visible-light irradiation,and an average O_(2) evolution rate of up to 191.5μmol h^(-1) g^(-1) is obtained,which is nearly 1.5 and 17 times higher than the rates obtained for Modoped BVO and pristine BVO,respectively.Density functional theory(DFT)calculations were also employed to further investigate the electronic structure of the co-doped products.展开更多
This study demonstrates that the integration of plasmonic palladium(Pd)nanoparticles between a bismuth vanadate(BVO)coating and an electrode interface can significantly improve solar-driven glycerol oxidation.Pd nanop...This study demonstrates that the integration of plasmonic palladium(Pd)nanoparticles between a bismuth vanadate(BVO)coating and an electrode interface can significantly improve solar-driven glycerol oxidation.Pd nanoparticles of controllable shape,size and coverage were produced using a novel aerosol-assisted chemical vapour deposition(AACVD)synthetic route and then coated with BVO using the same technique.The nanoparticles enhanced visible light absorption and crystallinity.At 1.23 VRHE,the photocurrent density of bare BVO increased from 0.62 mA cm^(-2) in the absence of glycerol to 1.20 mA cm^(-2) with 0.5 M glycerol.When Pd nanoparticles were incorporated beneath BVO,the photocurrent further increased from 0.86 mA cm^(-2) without glycerol to 1.58 mA cm^(-2) with 0.5 M glycerol,and the incident photon-to-current conversion efficiency(IPCE)boosted from~15%to~40%at 400 nm.Ultra-fast transient absorption spectroscopy suggests that the addition of Pd nanoparticles introduces additional charge transfer pathways,including hot electron injection and plasmon-coupled states,which prolong carrier lifetimes and suppress recombination.These combined effects provide a promising strategy to improve the efficiency and durability of photoelectrochemical devices for sustainable fuel generation and selective organic oxidation reactions.展开更多
基金the Natural Science Foundation of China(21671173)the Zhejiang Provincial Natural Science Foundation of China(LR14B010001)+7 种基金the Zhejiang Provincial Public Welfare Project(2016C31015)the support received from the Natural Science Foundation of China(11504299)Jiangsu University Natural Science Research Program(16KJB140015)the financial support received from the National Key Technologies R&D Program of China(2016YFA0201101)Cutting-edge Key Research Program of Chinese Academy of Sciences(QYZDB-SSW-JSC014)Natural Science Foundation of China(61674166)Hundred Talents Program of Chinese Academy of SciencesNational Key Technologies R&D Program of China(2016YFB0402300).
文摘Co-doping of metal ions in semiconductor photocatalysts is a promising strategy to promote photocatalytic activity due to its expected synergistic effects.In this study,we demonstrated the first synthesis of uniform Fe and Mo co-doped BiVO_(4)(Fe/Mo-BVO)porous nanoshuttles(PNSs)through a simple solvothermal method combined with a subsequent impregnation thermal treatment.It has been discovered that the incorporation of Fe and Mo into the BVO lattice not only influences the shuttle-like morphology and porous structure but also modifies the band structure of the pristine BVO;this consequently boosts the photocatalytic performance of BVO.The as-prepared Fe/Mo-BVO PNSs exhibit significantly enhanced photoactivity for water oxidation under visible-light irradiation,and an average O_(2) evolution rate of up to 191.5μmol h^(-1) g^(-1) is obtained,which is nearly 1.5 and 17 times higher than the rates obtained for Modoped BVO and pristine BVO,respectively.Density functional theory(DFT)calculations were also employed to further investigate the electronic structure of the co-doped products.
基金support from UKRI/EPSRC(ActionSpec,Grant Ref:EP/X030822/1)Imperial College London for a Dean’s PhD Scholarship.B.T.and A.K.thank the EPSRC for a Programme Grant(EP/W017075/1)funding by the Imperial College London President’s PhD Scholarships.
文摘This study demonstrates that the integration of plasmonic palladium(Pd)nanoparticles between a bismuth vanadate(BVO)coating and an electrode interface can significantly improve solar-driven glycerol oxidation.Pd nanoparticles of controllable shape,size and coverage were produced using a novel aerosol-assisted chemical vapour deposition(AACVD)synthetic route and then coated with BVO using the same technique.The nanoparticles enhanced visible light absorption and crystallinity.At 1.23 VRHE,the photocurrent density of bare BVO increased from 0.62 mA cm^(-2) in the absence of glycerol to 1.20 mA cm^(-2) with 0.5 M glycerol.When Pd nanoparticles were incorporated beneath BVO,the photocurrent further increased from 0.86 mA cm^(-2) without glycerol to 1.58 mA cm^(-2) with 0.5 M glycerol,and the incident photon-to-current conversion efficiency(IPCE)boosted from~15%to~40%at 400 nm.Ultra-fast transient absorption spectroscopy suggests that the addition of Pd nanoparticles introduces additional charge transfer pathways,including hot electron injection and plasmon-coupled states,which prolong carrier lifetimes and suppress recombination.These combined effects provide a promising strategy to improve the efficiency and durability of photoelectrochemical devices for sustainable fuel generation and selective organic oxidation reactions.
