Constructing Z-scheme 1D/2D heterojunction of ZnIn2S4 nanosheets decorated WO3 
nanorods to enhance Cr(VI) photocatalytic reduction and rhodamine B degradation

Lian, Xinyi; Huang, Zongyi; Zhang, Yuqi; Chen, Zhou; Meidl, Peter; Yi, Xiaodong; Xu, Baile

doi:10.1016/j.chemosphere.2022.137351

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Constructing Z-scheme 1D/2D heterojunction of ZnIn₂S₄ nanosheets decorated WO₃ nanorods to enhance Cr(VI) photocatalytic reduction and rhodamine B degradation

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Lian, Xinyi
Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Lian, X., Huang, Z., Zhang, Y., Chen, Z., Meidl, P., Yi, X., et al. (2023). Constructing Z-scheme 1D/2D heterojunction of ZnIn₂S₄ nanosheets decorated WO₃ nanorods to enhance Cr(VI) photocatalytic reduction and rhodamine B degradation. Chemosphere, 313: 137351. doi:10.1016/j.chemosphere.2022.137351.

Cite as: https://hdl.handle.net/21.11116/0000-000C-CBC5-1

Abstract

Photocatalysis has been vastly employed as a feasible and efficient strategy for the removal of environmental pollutants. In this study, a well-designed core-shell heterojunction of WO₃ decorated with ZnIn₂S₄ nanosheets were fabricated under mild in-situ conditions, and fabricated processes were systematically investigated with different fabrication durations. The coupling of WO₃ and ZnIn₂S₄ (ZIS) resulted in a Z-scheme mechanism for charge carrier transfer, holding the respective redox capacity. The as-prepared 1D/2D WO₃@ZIS heterostructure displayed the highest removal efficiency within 30 min for 25 mg L^-1 Cr(VI), 89.3 and 29.7 times higher than pure WO₃ and ZnIn₂S₄. 1D/2D WO₃@ZIS remained excellently stable after 5 cycling experiments. Moreover, 40 mg L^-1 RhB could be degraded within 50 min. The broad and short photogenerated electron transportation path is guaranteed by the 1D/2D and Z-scheme charge separation mechanism. It efficiently prevented photo-generated charge carriers from recombination, resulting in a longer carrier lifespan and better photocurrent responses than that of pure ones. This photocatalytic system showed promising results and also provides a framework for an efficient system for photocatalysis with potential for environmental application.