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Enhanced photocatalytic activity on elemental mercury over pink BiOIO3 nanosheets with abundant oxygen vacancies

  • Catalysis, Reaction Engineering
  • Published:
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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 44.52 m2/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.

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Acknowledgements

This work was partially sponsored by National Natural Science Foundation of China (52076126) and Natural Science Foundation of Shanghai (18ZR1416200), and Projects of Shanghai Science and Technology Committee (20DZ1205207).

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Author notes

  1. Yang Ling and Jiachen Li have equal contribution to this work.

Authors and Affiliations

  1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China

    Yang Ling & Jiang Wu

  2. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China

    Jiachen Li, Jiang Wu, Hailong Liu, Xu Mao, Qian Ma, Zhanwei Qiao & Weiqun Chu

  3. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou, 225127, China

    Yongfeng Qi

  4. Shanghai Environment Monitoring Center, Shanghai, 200030, China

    Qizhen Liu

Authors
  1. Yang Ling
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  2. Jiachen Li
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  3. Jiang Wu
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  4. Hailong Liu
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  5. Xu Mao
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  7. Qian Ma
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Corresponding authors

Correspondence to Jiang Wu or Qizhen Liu.

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Ling, Y., Li, J., Wu, J. et al. Enhanced photocatalytic activity on elemental mercury over pink BiOIO3 nanosheets with abundant oxygen vacancies. Korean J. Chem. Eng. 39, 343–352 (2022). https://doi.org/10.1007/s11814-021-0925-y

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  • DOI: https://doi.org/10.1007/s11814-021-0925-y

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