Efficient electrocatalytic oxidation of tetracycline in water using a SnO2-Sb/FTO electrode

文献类型： 外文期刊

第一作者： Xia, Kaixin

作者： Xia, Kaixin;Zhou, Xue;Zhang, Jinzhong;Xia, Kaixin;Deng, Dongli;Liu, Shuliu;Qin, Tianhui;Tang, Bobin;Zou, Yun

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关键词： Electrocatalytic oxidation; Tetracycline; SnO2-Sb/FTO electrode; Energy consumption; Degradation mechanism

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2025 年 70 卷

页码：

收录情况： SCI

摘要： Tetracycline (TC) has been emerged as a recalcitrant pollutant in water environment, and how to efficiently remove it has become a recent research focus. In this study, a low-cost SnO2-Sb/FTO electrode has been successfully constructed using fluorine-doped tin oxide (FTO) conductive glass as the substrate by simple sol-gel and calcination method, and was utilized in the electrocatalytic oxidation of TC in aqueous solution. The surface morphology and crystal structure of the SnO2-Sb/FTO electrode were characterized by various techniques. Electrochemical characterization indicated that SnO2-Sb/FTO electrode has good conductivity, excellent electrocatalytic activity and high oxygen evolution potential. In a 50 mM Na2SO4 solution, 5 mg.L-1 TC was completely removed within 25 min at 1.25 mA.cm(-2) with no pH adjustment (pH 6), and the first-order reaction rate constant was obtained as 0.144 min(-1) with the energy consumption of 13.63 kW.h.kg(-1). Electron paramagnetic resonance measurement (EPR) and free radical quenching experiments indicated the crucial role of .OH in the electrocatalytic oxidation process. By identifying the degradation products and DFT calculations, the possible degradation pathways of TC were proposed, and the reaction regions of TC were analyzed. Moreover, the electrode exhibited outstanding stability and reusability. It is promising to efficiently remove TC in wastewater by using the SnO2-Sb/FTO electrode.

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