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Performance and mechanism of tetracycline removal by peroxymonosulfate-assisted double Z-scheme LaFeO3/g-C3N4/ZnO heterojunction under visible light drive

文献类型： 外文期刊

作者： Wang, Jie 1 ; Zhang, Jiahua 1 ; Cheng, Guofeng 1 ; Zhang, Kai 3 ; Liu, Xingguo 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, 63 Chifeng Rd, Shanghai 200092, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Aquaculture Facil Engn, 63 Chifeng Rd, Shanghai 200092, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China

关键词： Perovskite; Persulfate activation technology; Photocatalytic; Antibiotic degradation

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.1； 五年影响因子：7.1 ）

ISSN： 2352-1864

年卷期： 2025 年 39 卷

页码：

收录情况： SCI

摘要： The photocatalytic persulfate activation technology has attracted attention due to the synergistic effect that can be generated by the coupling of photocatalysis and persulfate. In this study, a ternary heterostructure LaFeO3/g-C3N4/ZnO was successfully formed, and a coupled photocatalytic/PMS system was constructed. The coupled system exhibited synergistic effect and achieved high tetracycline removal efficiency and quick kinetic, as 85.89 % tetracycline was degraded within 40 min. Additionally, the coupled system has a wider pH adaptation range and can better resist the influence of coexisting ions (Cl-, CO2-3 ) and humic acid. Mechanism investigation indicated that the double-Z scheme heterojunction between LaFeO3, g-C3N4 and ZnO provides driving force for charge transfer and improves the separation of photogenerated electron-hole pairs, and PMS can act as an electron acceptor to prevent photogenerated electron hole recombination. center dot SO-4 , center dot OH, center dot O-2 , h+, and 1O2 work together in photocatalysis/PMS coupled system, with center dot OH and center dot SO-4 play a major role. Compared to solo photocatalytic system, the toxicity of tetracycline degradation intermediate products is lower and the mineralization degree of tetracycline is higher in the coupled system. Besides, LaFeO3/g-C3N4/ZnO also exhibiting superior photocatalytic performance after four cycles. This work provides reference for photocatalytic persulfate activation technology to degrade tetracycline in water.

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