A novel S-scheme ZnO/Ce-g-C3N5 heterojunctions with enhanced photocatalytic activity

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2024-07-20 DOI:10.1007/s10971-024-06491-w

Jia Jia, Lili Huang, Yumin Yan, Haiqiao Wang, Mingxia Tian, Jianhui Jiang

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Abstract

The g-C₃N₅, characterized by its two-dimensional layered structure, substantial surface area, and narrow bandgap, has found extensive application in photocatalysis. This study involves the incorporation of cerium-doped g-C₃N₅ with ZnO to form a S-scheme photocatalyst, significantly enhancing the photocatalytic activity of the material. The ZnO/Ce-g-C₃N₅ composite photocatalyst shows a degradation efficiency for methylene blue (MB) that is 5.0 times higher than that of g-C₃N₅ and 2.9 times higher than that of ZnO. This superior performance is attributed to the synergistic effect of Ce doping and S-type heterojunction formation, which markedly enhances the separation of photo-induced electron-hole pairs and broadens the light response range, while also maintaining the high redox capacity of the S-scheme ZnO/Ce-g-C₃N₅ system. The fabrication of this novel photocatalyst holds promising prospects for the treatment of organic pollutants in water.

Graphical Abstract

The synthesized S-scheme ZN/Ce–CN composite reduce electron/hole recombination and enhance visible light response, enabling efficient photocatalytic degradation of methylene blue through the synergistic effect of cerium doping and the heterojunction.

Abstract Image

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具有更强光催化活性的新型 S 型 ZnO/Ce-g-C3N5 异质结

g-C3N5 具有二维层状结构、巨大的比表面积和窄带隙等特点，在光催化领域有着广泛的应用。本研究将掺铈的 g-C3N5 与氧化锌结合，形成一种 S 型光催化剂，显著提高了材料的光催化活性。ZnO/Ce-g-C3N5 复合光催化剂对亚甲基蓝（MB）的降解效率是 g-C3N5 的 5.0 倍，是 ZnO 的 2.9 倍。这种优异的性能归功于 Ce 掺杂和 S 型异质结形成的协同效应，它显著增强了光诱导电子-空穴对的分离，拓宽了光响应范围，同时还保持了 S 型 ZnO/Ce-g-C3N5 系统的高氧化还原能力。这种新型光催化剂的制备为处理水中的有机污染物带来了广阔的前景。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.