Confinement effects of carbonized polymer dots and directional migration of ZnIn2S4 photogenerated charge carriers for enhanced water purification

Xingwang Yan; Xiaolin Zhang; Bin Wang; Ziran Chen; Junze Zhao; Gaopeng Liu; Dan Li; Qingdong Ruan; Liangliang Liu; Yue Xu; Mengxia Ji; Paul K. Chu; Huaming Li; Jiexiang Xia

doi:10.1016/j.apsusc.2022.155782

Author(s)

Xingwang Yan
Bin Wang
Ziran Chen
Junze Zhao
Gaopeng Liu
Yue Xu
Mengxia Ji
Huaming Li
Jiexiang Xia

Related Research Unit(s)

Detail(s)

Original language	English
Article number	155782
Journal / Publication	Applied Surface Science
Volume	612
Online published	21 Nov 2022
Publication status	Published - 1 Mar 2023

Link(s)

DOI	DOI https://doi.org/10.1016/j.apsusc.2022.155782 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85142676157&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a2336946-e39e-4768-901d-10091e3f176c).html

Abstract

Efficient heterojunction photocatalysts with spatial separation of photogenerated carriers are crucial to photocatalysis. Herein, the unique carbonized polymer dots/ZnIn₂S₄ (CPDs/ZIS) Z-scheme heterojunction is designed to realize efficient spatial directional separation of photogenerated carriers. The CPDs broaden the light absorption range of ZIS and lengthen the lifetime of photogenerated charges. As the enrichment center of photogenerated electrons and active site of activated oxygen, CPDs generate more superoxide radicals to facilitate mineralization of organic pollutants by means of confined catalysis. The Z-scheme migration mechanism of photogenerated carriers in the CPDs/ZIS composite preserves the original valence band potential of ZIS and retains more holes for oxidation. Compared to the pristine ZIS, the CPDs/ZIS composite delivers enhanced photocatalytic performance in pollutant degradation. Electron spin resonance spectroscopy, free radical capture experiments, and liquid chromatography/mass spectrometry are performed to elucidate the photocatalytic mechanism of CPDs/ZIS.

Research Area(s)

Confinement effects, CPDs, Photocatalysis, Z-scheme heterojunction, ZnIn2S4

Citation Format(s)

[ RIS ] [ BibTeX ]

Confinement effects of carbonized polymer dots and directional migration of ZnIn₂S₄ photogenerated charge carriers for enhanced water purification. / Yan, Xingwang; Zhang, Xiaolin; Wang, Bin et al.
In: Applied Surface Science, Vol. 612, 155782, 01.03.2023.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Yan, X, Zhang, X, Wang, B, Chen, Z, Zhao, J, Liu, G, Li, D , Ruan, Q , Liu, L, Xu, Y, Ji, M, Chu, PK, Li, H & Xia, J 2023, 'Confinement effects of carbonized polymer dots and directional migration of ZnIn₂S₄ photogenerated charge carriers for enhanced water purification', Applied Surface Science, vol. 612, 155782. https://doi.org/10.1016/j.apsusc.2022.155782

Yan, X., Zhang, X., Wang, B., Chen, Z., Zhao, J., Liu, G., Li, D., Ruan, Q., Liu, L., Xu, Y., Ji, M., Chu, P. K., Li, H., & Xia, J. (2023). Confinement effects of carbonized polymer dots and directional migration of ZnIn₂S₄ photogenerated charge carriers for enhanced water purification. Applied Surface Science, 612, Article 155782. https://doi.org/10.1016/j.apsusc.2022.155782

Yan X, Zhang X, Wang B, Chen Z, Zhao J, Liu G et al. Confinement effects of carbonized polymer dots and directional migration of ZnIn₂S₄ photogenerated charge carriers for enhanced water purification. Applied Surface Science. 2023 Mar 1;612:155782. Epub 2022 Nov 21. doi: 10.1016/j.apsusc.2022.155782

Yan, Xingwang ; Zhang, Xiaolin ; Wang, Bin et al. / Confinement effects of carbonized polymer dots and directional migration of ZnIn₂S₄ photogenerated charge carriers for enhanced water purification. In: Applied Surface Science. 2023 ; Vol. 612.