Constructing charge transfer channel between dopants and oxygen vacancies for enhanced visible-light-driven water oxidation
作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Centre for Excellence in NanoscienceiCHEMUniversity of Science and Technology of ChinaHefei 230026China Institute of EnergyHefei Comprehensive National Science CenterHefei 230031China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2021年第14卷第10期
页 面：3365-3371页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：This work was financially supported by the National Key R&D Program of China(No.2017YFA0207301) the National Natural Science Foundation of China(Nos.21622107,11621063,U1532265,and 21890750) the Youth Innovation Promotion Association CAS(No.2016392),the Key Research Program of Frontier Sciences(No.QYZDY-SSW-SLH011) the Major Program of Development Foundation of Hefei Center for Physical Science and Technology(No.2017FXZY003)
主 题：water oxidation reaction Bi2WO6 nanosheets oxygen vacancies valence band maximum charge transfer channel
摘 要：Photocatalytic water oxidation is a crucial step in water splitting,but is generally restricted by the slow ***,it is necessary to develop high-performance water oxidation ***,the Fe-doped Bi2WO6 nanosheets with oxygen vacancies(OVs)were synthesized for enhanced photocatalytic water oxidation efficiency,showing a synergistic effect between Fe dopants and *** a molar fraction of 2%Fe was doped into the Bi2WO6 nanosheets,the visible-light-driven photocatalytic oxygen evolution rate was increased up to 131.3μmol·h^(-1)·g_(cat)^(-1)under ambient conditions,which was more than 3 times that of pure Bi2WO6 *** proper doping concentration of Fe could promote the formation of OVs and at the same time modulate the band structure of catalysts,especially the position of the valence band maximum(VBM),leading to effective visible-light absorption and enhanced oxidizing ability of photogenerated *** ameliorated localized electron distribution,fast charge transfer channel emerged between the OVs and adjacent metal atoms,which accelerated the charge carrier transfer and promoted the separation of photoexcited electrons and *** work provides feasible approaches for designing efficient two-dimensional semiconductor water oxidation photocatalysts that could utilize visible-light,which will make more use of solar energy.
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