Vacancy‐Rich Monolayer BiO2−x as a Highly Efficient UV,Visible, and Near‐Infrared Responsive Photocatalyst |
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| Authors: | Jun Li Prof Xiaoyong Wu Wenfeng Pan Prof Gaoke Zhang Dr Hong Chen |
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| Institution: | 1. Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, People's Republic of China;2. Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan, People's Republic of China;3. SSRL, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California, USA |
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| Abstract: | Vacancy‐rich layered materials with good electron‐transfer property are of great interest. Herein, a full‐spectrum responsive vacancy‐rich monolayer BiO2?x has been synthesized. The increased density of states at the conduction band (CB) minimum in the monolayer BiO2?x is responsible for the enhanced photon response and photo‐absorption, which were confirmed by UV/Vis‐NIR diffuse reflectance spectra (DRS) and photocurrent measurements. Compared to bulk BiO2?x, monolayer BiO2?x has exhibited enhanced photocatalytic performance for rhodamine B and phenol removal under UV, visible, and near‐infrared light (NIR) irradiation, which can be attributed to the vacancy VBi‐O′′′ as confirmed by the positron annihilation spectra. The presence of VBi‐O′′′ defects in monolayer BiO2?x promoted the separation of electrons and holes. This finding provides an atomic level understanding for developing highly efficient UV, visible, and NIR light responsive photocatalysts. |
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| Keywords: | band gap bismuth oxides monolayers oxygen vacancies photocatalysts |
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