磁性g-C3N4/CoFe2O4光催化剂的制备及其性能研究

摘要采用超声低温煅烧法制备了一种可回收的磁性复合光催化材料g-C₃N₄/CoFe₂O₄,并通过X射线衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)和紫外-可见漫反射光谱(UV-vis)等对样品进行了表征。以罗丹明B(RhB)为代表性污染物,探究了g-C₃N₄/CoFe₂O₄的光催化性能。结果表明:g-C₃N₄与CoFe₂O₄复合质量比为3∶1时g-C₃N₄/CoFe₂O₄表现出最佳的光催化活性,重复使用5次后对RhB降解率仍能达到92%,表现出良好的使用稳定性。在外部磁场的作用下,可将其进行有效的分离回收。光催化降解机理研究表明,·OH和·O^-₂是光催化降解RhB的主要活性物种。

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	罗杰
	常薇
	张立
	雷超
	李云锋
	刘斌

关键词：光催化磁性 g-C₃N₄/CoFe₂O₄ 有机污染物

Abstract： A recyclable magnetic composite g-C₃N₄/CoFe₂O₄ was prepared by ultrasonic coupled with low-temperature calcination process. The g-C₃N₄/CoFe₂O₄ was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet visible diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the g-C₃N₄/CoFe₂O₄ was investigated using Rhodamine B (RhB) as the simulated pollutant. The results show that when the mass ratio of g-C₃N₄ to CoFe₂O₄ is 3∶1, g-C₃N₄/CoFe₂O₄ exhibits the best photocatalytic activity. The degradation rate of RhB can still reach 92% after repeated use for 5 times, showing good stability in practical application. The g-C₃N₄/CoFe₂O₄ can be separated and recovered easily under an external magnetic field. Studies on the photocatalytic degradation mechanism showed that ·OH and ·O^-₂ are the main active species for photocatalytic degradation of RhB.

Keywords： photocatalysis magnetic g-C₃N₄/CoFe₂O₄ organic pollutants

Received 2021-12-20;

Fund:国家自然科学基金项目(22008185);陕西省重点研发计划项目(2021KW-12);柯桥西纺产学研协同创新项目(19KQZD07)。

Corresponding Authors: 常薇,教授,E-mail:changwei@xpu.edu.cn。 Email: changwei@xpu.edu.cn

About author: 罗杰(1997-),男,硕士研究生,现从事光催化材料方面的研究。

引用本文:

罗杰, 常薇, 张立, 雷超, 李云锋, 刘斌.磁性g-C₃N₄/CoFe₂O₄光催化剂的制备及其性能研究[J]. 化学工业与工程, 2023,40(5): 1-7

LUO Jie, CHANG Wei, ZHANG Li, LEI Chao, LI Yunfeng, LIU Bin.Preparation and properties of magnetic g-C₃N₄/CoFe₂O₄ photocatalyst[J]. Chemcial Industry and Engineering, 2023,40(5): 1-7

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