CoFe2O4/BiFeO3 Z型异质结的制备及其光催化降解盐酸黄连素

doi:10.16085/j.issn.1000-6613.2023-2080

化工进展 ›› 2024, Vol. 43 ›› Issue (12): 6838-6848.DOI: 10.16085/j.issn.1000-6613.2023-2080

• 材料科学与技术 • 上一篇

CoFe₂O₄/BiFeO₃ Z型异质结的制备及其光催化降解盐酸黄连素

周添红¹^,²(), 翟天骄¹^,², 王金怡¹^,², 苏旭¹^,², 王花兰³, 张洪伟¹^,²()

^1.兰州交通大学环境与市政工程学院，甘肃兰州 730070
^2.甘肃省黄河水环境重点实验室，甘肃兰州 730070
^3.兰州交通大学交通运输学院，甘肃兰州 730070

收稿日期:2023-11-28 修回日期:2024-01-30 出版日期:2024-12-15 发布日期:2025-01-11
通讯作者: 张洪伟
作者简介:周添红（1984—），男，副教授，研究方向为水污染控制。E-mail：zhouth@163.com。
基金资助:
2023年甘肃省高校产业支撑计划(2023CYZC-41);甘肃省科技厅自然科学基金(22JR5RA316);甘肃省重点研发计划(23YFFA0058);甘肃省科技计划(20ZD7FA005-04)

Preparation of CoFe₂O₄/BiFeO₃ Z-scheme heterojunction and its photocatalytic degradation of berberine hydrochloride

ZHOU Tianhong¹^,²(), ZHAI Tianjiao¹^,², WANG Jinyi¹^,², SU Xu¹^,², WANG Hualan³, ZHANG Hongwei¹^,²()

^1.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China
^2.Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, Gansu, China
^3.School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

Received:2023-11-28 Revised:2024-01-30 Online:2024-12-15 Published:2025-01-11
Contact: ZHANG Hongwei

摘要/Abstract

摘要：

抗生素在水环境中的污染问题已经受到广泛关注，而光催化技术在该领域具有较好的应用前景。半导体复合构建Z型异质结能够提高载流子分离效率，进而提高光催化降解效率。本文采用水热法制备了CoFe₂O₄/BiFeO₃ Z型异质结，并对其结构及光磁性能进行表征，将其应用于光催化降解盐酸黄连素，综合评价其光催化性能。结果表明：复合催化剂具有良好的光和磁响应性能；在使用CoFe₂O₄和BiFeO₃比例为1∶2的复合异质结，催化剂用量为20mg，污染物浓度为5mg/L，pH为3时，反应120min的降解率达到86.76%，且该异质结展现出较好的稳定性。控制反应的活性物质为空穴和超氧自由基。Z型异质结的构建使得其光催化性能提高。CoFe₂O₄/BiFeO₃ Z型异质结有良好的环境友好性，可应用于水环境中抗生素的降解。该研究为光催化降解抗生素等有机污染物提供了一个可行性思路。

关键词: 铁酸钴, 铁酸铋, 光催化氧化, 盐酸黄连素, 污染物降解, 降解机理

Abstract:

The pollution of antibiotics in the water environment has been widely concerned, and the photocatalytic technology has a good application prospect in this field. Semiconductor composite construction of Z-scheme heterojunctions can improve carrier separation efficiency and thus photocatalytic degradation efficiency. Herein, CoFe₂O₄/BiFeO₃ Z-scheme heterojunctions were prepared by hydrothermal method and characterized for their structural and photomagnetic properties, which were applied to the photocatalytic degradation of safranin hydrochloride and comprehensively evaluated for their photocatalytic performance. The results showed that the composite catalyst had good optical and magnetic response properties. The degradation rate reached 86.76% at 120min of reaction with a composite heterojunction with a 1∶2 ratio of CoFe₂O₄ and BiFeO₃, a catalyst dosage of 20mg, a pollutant concentration of 5mg/L, and a pH of 3, with good stability. The active substances controlling the reaction were holes and superoxide radicals, and the construction of Z-scheme heterojunctions led to the improvement of their photocatalytic performance. The CoFe₂O₄/BiFeO₃ Z-scheme heterojunctions were environmentally friendly and could be applied to the degradation of antibiotics in aqueous environments. This study provides a feasible idea for the photocatalytic degradation of antibiotics and other organic pollutants.

Key words: CoFe₂O₄, BiFeO₃, photocatalytic oxidation, berberine hydrochloride, pollutant degradation, degradation mechanism

中图分类号:

O643

周添红, 翟天骄, 王金怡, 苏旭, 王花兰, 张洪伟. CoFe₂O₄/BiFeO₃ Z型异质结的制备及其光催化降解盐酸黄连素[J]. 化工进展, 2024, 43(12): 6838-6848.

ZHOU Tianhong, ZHAI Tianjiao, WANG Jinyi, SU Xu, WANG Hualan, ZHANG Hongwei. Preparation of CoFe₂O₄/BiFeO₃ Z-scheme heterojunction and its photocatalytic degradation of berberine hydrochloride[J]. Chemical Industry and Engineering Progress, 2024, 43(12): 6838-6848.

图/表 11

图1 催化剂的XRD谱图

图2 CoFe2O4/BiFeO3的XPS谱图和3种催化剂的红外光谱图

图3 催化剂的电镜图像

图4 催化剂的光及磁响应性能

图5 不同条件下BH的降解效果

图6 不同反应时间的BH紫外光谱和TOC去除效果

图7 加入不同捕获剂对BH降解的影响

图8 催化剂的EIS图

图9 CoFe2O4和BiFeO3的XPS价带谱

图10 CoFe2O4/BiFeO3 Z型异质结光催化机理

图11 催化剂的稳定性

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CoFe₂O₄/BiFeO₃ Z型异质结的制备及其光催化降解盐酸黄连素

Preparation of CoFe₂O₄/BiFeO₃ Z-scheme heterojunction and its photocatalytic degradation of berberine hydrochloride

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