High-efficiency PMS activation by difunctional Co-Fe PBA/g-C3N4 S-scheme heterojunction for oxytetracycline degradation: Performance evaluation and mechanism insight

被引：0

作者：

Chen, Junjie ^{[1
]}

Yu, Shuning ^{[1
]}

Jiang, Xialiang ^{[1
]}

Chen, Cheng ^{[1
]}

Shen, Liguo ^{[1
]}

Li, Renjie ^{[1
]}

Xu, Yanchao ^{[1
]}

Zhou, Mingzhu ^{[1
]}

Li, Bisheng ^{[1
]}

Lin, Honjun ^{[1
]}

机构：

[1] College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua

来源：

Science of the Total Environment | 2024年 / 957卷

基金：

中国国家自然科学基金;

关键词：

Charge transfer; Co-Fe PBA; g-C[!sub]3[!/sub]N[!sub]4[!/sub; Photocatalysis; PMS activation;

D O I：

10.1016/j.scitotenv.2024.177326

中图分类号：

学科分类号：

摘要：

The utilization of sulfate radical-based advanced oxidation processes (SR-AOPs) has captivated the academic community due to their minimal energy requirements and superior efficacy in peroxomonosulfate (PMS) activation for pollutant decomposition. Notwithstanding these advantages, engineering an effective and economical catalyst for PMS activation presents a considerable hurdle. In the present study, a metal-organic framework of Co[sbnd]Fe PBA is ingeniously anchored onto g-C3N4 nanosheets, resulting in the formation of an innovative Co[sbnd]Fe PBA/g-C3N4 S-scheme heterojunction that demonstrates remarkable efficiency in PMS activation. Intriguingly, the catalytic efficiency of Co[sbnd]Fe PBA/g-C3N4 surpasses that of g-C3N4 and Co[sbnd]Fe PBA by 7-fold and 2.33-fold, respectively. The heightened activity of Co[sbnd]Fe PBA/g-C3N4 heterojunction is attributed to the enhanced charge transfer efficiency, a consequence of the successful heterojunction formation. Concurrently, the ability of photoexcited electrons to reduce Co3+/Fe3+ to Co2+/Fe2+ bolsters PMS activation. Significantly, this heterojunction retains unparalleled stability in degrading oxytetracycline without discernible performance attenuation, heralding its commendable prospects in real-world applications. Besides, mechanism exploration indicates that SO4[rad]−, h+, and electron transfer contribute to oxytetracycline degradation in the Co[sbnd]Fe PBA/g-C3N4 system. This investigation serves as a beacon for the strategic development of highly active and stable catalysts for PMS activation, aiming at environmental decontamination. © 2024

引用

共 67 条

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