标题:Oxygen vacancy-rich BiO2-x ultra-thin nanosheet for efficient full-spectrum responsive photocatalytic oxygen evolution from water splitting
作者:Sun, Benteng ;Qian, Yeye ;Liang, Zhangqian ;Guo, Yichen ;Xue, Yanjun ;Tian, Jian ;Cui, Hongzhi
作者机构:[Sun, Benteng ;Qian, Yeye ;Liang, Zhangqian ;Guo, Yichen ;Xue, Yanjun ;Tian, Jian ;Cui, Hongzhi ] School of Materials Science and Engineering, Shandon 更多
通讯作者:Tian, Jian
来源:Solar Energy Materials and Solar Cells
出版年:2019
卷:195
页码:309-317
DOI:10.1016/j.solmat.2019.03.030
摘要:Photocatalytic water splitting is an environmentally friendly technique for oxygen evolution. Vacancy-rich layered materials with good electromigration properties are of great interests. Herein, we synthesized full-spectrum responsive vacancy-rich BiO2-x ultra-thin nanosheets (UTNSs). The band gap is narrowed and the edge of valence band is increased in the BiO2-x UTNSs, which are responsible for the enhanced light response and are confirmed by UV–Vis–NIR diffuse reflectance spectra (DRS), electronic spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and valence measurement. Compared to Bi2O3 nanosheets (NSs), BiO2-x UTNSs exhibits enhanced photocatalytic performance for oxygen evolution under full-spectrum irradiation, which can be attributed to the oxygen vacancies. The presence of oxygen vacancies in BiO2-x UTNSs promote the oxidation ability. This finding provides defect level understanding for developing highly efficient full-spectrum light responsive photocatalysts.
© 2019 Elsevier B.V.
收录类别:EI
资源类型:期刊论文
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