Citation: Jingwen Pan, Zhongjie Guan, Jianjun Yang, Qiuye Li. Facile fabrication of ZnIn₂S₄/SnS₂ 3D heterostructure for efficient visible-light photocatalytic reduction of Cr(VI)[J]. Chinese Journal of Catalysis, ;2020, 41(1): 200-208. doi: S1872-2067(19)63422-4 shu

Facile fabrication of ZnIn₂S₄/SnS₂ 3D heterostructure for efficient visible-light photocatalytic reduction of Cr(VI)

Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, Henan, China

Received Date: 11 April 2019
Revised Date: 3 June 2019

Fund Project: The authors gratefully acknowledge the support of the National Natural Science Foundation of China (51702087 and 21673066), Project funded by China Postdoctoral Science Foundation (2019M652516), and the Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology, Nanjing University.

Photocatalytic method has been intensively explored for Cr(VI) reduction owing to its efficient and environmentally friendly natures. In order to obtain a high efficiency in practical application, efficient photocatalysts need to be developed. Here, ZnIn₂S₄/SnS₂ with a three-dimensional (3D) heterostructure was prepared by a hydrothermal method and its photocatalytic performance in Cr(VI) reduction was investigated. When the mass ratio of SnS₂ to ZnIn₂S₄ is 1:10, the ZnIn₂S₄/SnS₂ composite exhibits the highest photocatalytic activity with 100% efficiency for Cr(VI) (50 mg/L) reduction within 70 min under visible-light irradiation, which is much higher than those of pure ZnIn₂S₄ and SnS₂. The enhanced charge separation and the light absorption have been confirmed from the photoluminescence and UV-vis absorption spectra to be the two reasons for the increased activity towards photocatalytic Cr(VI) reduction. In addition, after three cycles of testing, no obvious degradation is observed with the 3D heterostructured ZnIn₂S₄/SnS₂, which maintains a good photocatalytic stability.
- ZnIn₂S₄/SnS₂ 3D heterostructure,
- Photocatalytic Cr(VI) reduction,
- Visible-light response,
- Charge separation,
- Photocatalytic stability
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通讯作者: 陈斌, bchen63@163.com

Facile fabrication of ZnIn₂S₄/SnS₂ 3D heterostructure for efficient visible-light photocatalytic reduction of Cr(VI)