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LIU Yufei, YANG Yurong, SUN Zhengxin, LIU Chang, QIU Min, GAO Fan. The Synthesis of Oxygen Vacancy-mediated BiVO4 Nanosheets and Their Performance in Photocatalytic Water Splitting O2 Evolution[J]. Journal of South China Normal University (Natural Science Edition), 2022, 54(3): 22-27. DOI: 10.6054/j.jscnun.2022039
Citation: LIU Yufei, YANG Yurong, SUN Zhengxin, LIU Chang, QIU Min, GAO Fan. The Synthesis of Oxygen Vacancy-mediated BiVO4 Nanosheets and Their Performance in Photocatalytic Water Splitting O2 Evolution[J]. Journal of South China Normal University (Natural Science Edition), 2022, 54(3): 22-27. DOI: 10.6054/j.jscnun.2022039
shu

The Synthesis of Oxygen Vacancy-mediated BiVO4 Nanosheets and Their Performance in Photocatalytic Water Splitting O2 Evolution

  • 1.

    Department of Science, Heihe University, Heihe 164300 China

  • 2.

    MOE Key Laboratory of Superlight Materials and Surface Technology/College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

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  • Received Date: August 03, 2021
  • Available Online: July 28, 2022
    Graphical Abstract
    • Abstract
  • Oxygen vacancy-mediated BiVO4 nanosheets were synthesized with the hydrothermal and sintering methods. The structure and hydrogen production properties of BiVO4 nanosheets with different oxygen vacancy (OV) contents were studied with X-ray diffractometer(XRD), electron spin resonance spectroscopy, high resolution transmission electron microscope, UV-Vis spectrophotometer, fluorescence spectrometer and the photocatalytic O2 evolution system. Through the regulation of Ov content, the optical absorption and optoelectronic properties of BiVO4 nanosheets were optimized, and the photocatalytic O2 production efficiency was greatly improved. The results showed that the optical absorption of BiVO4 nanosheets in the visible region was significantly enhanced after OV introduction, and the absorption edge of the sample is obviously red-shifted with the increase of OV content. The introduction of an appropriate OV amount could significantly improve the separation of photogenerated electrons and holes, thus improving the utilization rate of photogenerated electrons. The photocatalytic O2 production rate of BiVO4-OV2 nanosheets was about 433 μmol/(h·g), which was about 10 times higher than that of BiVO4.
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    • References (23)
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