Fabrication of Bi2WO6 quantum dots/ultrathin nanosheets 0D/2D homojunctions with enhanced photocatalytic activity under visible light irradiation

doi:10.1016/S1872-2067(18)63140-7

Abstract

Abstract:

A novel visible light-responsive homogeneous catalyst based on Bi₂WO₆ quantum dots (QDs-BWO)/Bi₂WO₆ nanosheets (N-BWO) was successfully fabricated through a simple hydrothermal method. A variety of techniques were employed to investigate the morphology, structure, and electronic properties of the samples. The photocatalytic performance of the QDs/N-BWO materials was investigated by monitoring the degradation of 4-chlorophenol and rhodamine B under visible light irradiation. The as-fabricated QDs/N-BWO materials showed higher photocatalytic activity than both QDs-BWO and N-BWO. The results reveal that the incorporation of the QDs improved the separation efficiency of electron-hole pairs, leading to enhanced photocatalytic activity. Moreover, the results of quenching experiments show that·O₂^- species played a major role in the degradation process. This work provides an important reference for the fabrication of homogeneous catalysts with high performance in the degradation of different types of pollutants.

Key words: Bi₂WO₆, Quantum dots, Nanosheet, Photocatalysis, Homojunction

Jingjing Xu, Junpeng Yue, Junfeng Niu, Mindong Chen, Fei Teng. Fabrication of Bi₂WO₆ quantum dots/ultrathin nanosheets 0D/2D homojunctions with enhanced photocatalytic activity under visible light irradiation[J]. Chinese Journal of Catalysis, 2018, 39(12): 1910-1918.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(18)63140-7

https://www.cjcatal.com/EN/Y2018/V39/I12/1910

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Fabrication of Bi₂WO₆ quantum dots/ultrathin nanosheets 0D/2D homojunctions with enhanced photocatalytic activity under visible light irradiation

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