CoFe2O4/carbon nitride Z-scheme heterojunction photocatalytic PMS activation for efficient tetracycline degradation: Accelerated electron transfer

被引：0
|
作者：
Pan, Bao [1 ]
Chen, Wen [1 ]
Zhou, Linxing [1 ]
Lai, Xiaojuan [1 ]
Qin, Jiani [2 ]
Wang, Chuanyi [2 ]
机构：
[1] Key Laboratory of Chemical Additives for China National Light Industry, School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an,710021, China
[2] School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an,710021, China
来源：
Process Safety and Environmental Protection | 2024年 / 191卷
关键词：
The escalating consumption of antibiotics and their subsequent discharge into the water supply is a matter of significant concern. This study presents an innovative visible light (VL) activated peroxymonosulfate (PMS) system for efficient degradation of the targeted antibiotic tetracycline (TC). CoFe2O4/carbon nitride (CFO/CN) Z-scheme heterojunctions were designed and synthesized through a simple co-precipitation and calcination strategy. Surface and analytical techniques were employed to comprehensively characterize the prepared CFO/CN; demonstrating its enhanced efficiency in separating photoinduced charge carriers. CFO/CN exhibited a 27-fold enhancement in TC degradation rate constants with PMS under VL. The effects of various factors including catalyst dosage; PMS concentration; initial pH; and content of CFO on TC degradation efficiency were investigated. Reactive species quenching and EPR measurements revealed the main contribution of superoxide radicals (•O2−) made to TC degradation. TC degradation pathways were proposed based on oxidized product analysis. The assessment of acute toxicity demonstrated the reduced toxicity of the formed intermediates. A plausible mechanism for TC degradation over CFO/CN-PMS-VL was discussed. This work provides a comprehensive guide for heterojunction photocatalytic activation of PMS for efficient micropollutant degradation. © 2024 The Institution of Chemical Engineers;
D O I：
10.1016/j.psep.2024.09.120
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页码：2522 / 2532
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