Fabrication of Z-scheme BiVO4/GO/g-C3N4 Photocatalyst with Efficient Visble-light Photocatalytic Performance

doi:10.15541/jim20190380

Abstract

Abstract:

Fabricating Z-scheme photocatalysts is a promising method for improving photocatalytic activity by effectively enhancing charge separation. A new Z-scheme BiVO₄/GO/g-C₃N₄ photocatalyst was prepared by two steps of impregnation-calcination and hydrothermal method, and then characterized by different methods. In the photocatalytic process of BiVO₄/GO/g-C₃N₄, GO nanosheet act as fast transmission channels between BiVO₄ and g-C₃N₄ and can suppress electron-hole recombination, which significantly promotes the charge separation and improves the redox ability of the ternary heterojunction. The ternary photocatalyst has good photocatalytic degradation of Rhodamine B (RhB) as compared to the single-component or binary composite. It is capable of degrading 85% of RhB in 120 min under visible light irradiation and the hole (h⁺) plays a major role in the reaction. This work provides a simple preparation method for a ternary photocatalyst system in which g-C₃N₄ coupled with BiVO₄ by GO to significantly improve photocatalytic activity.

Key words: BiVO₄, g-C₃N₄, GO, ternary photocatalyst, Z-scheme heterojunction

CLC Number:

TB34

XU Shichao,ZHU Tianzhe,QIAO Yang,BAI Xuejian,TANG Nan,ZHENG Chunming. Fabrication of Z-scheme BiVO₄/GO/g-C₃N₄ Photocatalyst with Efficient Visble-light Photocatalytic Performance[J]. Journal of Inorganic Materials, 2020, 35(7): 839-846.

Figures/Tables 7

References 25

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Fabrication of Z-scheme BiVO₄/GO/g-C₃N₄ Photocatalyst with Efficient Visble-light Photocatalytic Performance

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