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Received May 17, 2021
Accepted August 12, 2021
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Enhanced photocatalytic activity on elemental mercury over pink BiOIO3 nanosheets with abundant oxygen vacancies
Yang Ling1
Jiachen Li2
Jiang Wu1 2†
Hailong Liu2
Xu Mao2
Yongfeng Qi3
Qian Ma2
Qizhen Liu4†
Zhanwei Qiao2
Weiqun Chu2
1School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China 3School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China 4Shanghai Environment Monitoring Center, Shanghai 200030, China
wjcfd2002@163.com
Korean Journal of Chemical Engineering, February 2022, 39(2), 343-352(10), 10.1007/s11814-021-0925-y
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Abstract
Elemental mercury removal in coal-fired power plants is the key to global mercury pollution control, and photocatalytic oxidation is an effective and stable method. As a typical bismuth-based photocatalyst, BiOIO3 has a large band gap which is not conducive to the absorption and utilization of visible light, and its specific surface area also limits the diffusion and adsorption of reactants. In this work, pink BiOIO3 (PB) was first prepared successfully via vacuum calcination under absolute pressure of 1*10-3 Pa. The specific surface area of pink BiOIO3 is significantly increased to 44.52m2/g, which is 1.5-times compared with the traditional BiOIO3 prepared by hydrothermal method (only 29.60 m2/g). Abundant oxygen vacancy defects exist on sample surface, and the formed local BiOI Zero-dimensional (0-D) nanodots provide heterojunction-like effect combined with the BiOIO3, obtaining better photocatalytic property in the oxidation of elemental mercury. The as-prepared pink BiOIO3 and the preparation technology also have strong application potential in the field of energy and environment.
Keywords
References
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