化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (8) : 132-135. DOI: 10.19817/j.cnki.issn 1006-3536.2021.08.027

新材料与新技术

超导FeSe合金为助剂增强石墨相氮化碳的光催化活性研究

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Enhanced photocatalytic activity of g-C₃N₄ using superconductive FeSe alloy as a co-catalyst

Wang Yong, Chen Guihua

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Received		Published
2020-05-08		2021-08-20
Issue Date	Revised Date
2021-09-07	2020-05-08

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摘要

采用浸渍法将铁基超导材料β-FeSe合金粒子负载于石墨相氮化碳(g-C₃N₄),制备出FeSe/g-C₃N₄复合光催化剂。采用X射线衍射仪(XRD)和X射线光电子能谱(XPS)对复合材料的结构和性质进行了表征,研究了复合材料可见光下的催化活性。结果表明:FeSe/g-C₃N₄复合材料比g-C₃N₄和FeSe表现出更高的光催化活性,对甲基橙的降解率达到87.5%。此外,复合材料在循环实验中表现出良好的降解稳定性。基于荧光光谱和能带结构,提出了一种可能的机制,即g-C₃N₄受光激发产生的光生电子向FeSe转移,有效地抑制了g-C₃N₄光生电子空穴对的复合,延长了载流子的寿命。

Abstract

FeSe/g-C₃N₄ composite photocatalyst was prepared by impregnating the iron-based superconductor β-FeSe alloy particles onto g-C₃N₄.The structure and properties of the composite were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).The catalytic activity of the composite under visible light was investigated.The results showed that FeSe/g-C₃N₄ exhibited higher photocatalytic activity than g-C₃N₄ and FeSe,and the degradation rate of methyl orange reached 87.5%.In addition,the composite showed good degradation stability in the cyclic test.Based on the fluorescence spectrum and band gap structure,a possible mechanism was proposed,which was the transfer of photogenerated electrons from g-C₃N₄ excited by light to FeSe,effectively inhibiting the recombination of photogenerated electron hole pairs of g-C₃N₄ and prolonging the carrier lifetime.

关键词

石墨相氮化碳₄ / 硒化亚铁(FeSe) / 半导体 / 光催化

Key words

g-C₃N₄ / FeSe / semiconductor / photocatalysis

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超导FeSe合金为助剂增强石墨相氮化碳的光催化活性研究[J]. 化工新型材料, 2021, 49(8): 132-135 DOI:10.19817/j.cnki.issn 1006-3536.2021.08.027

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