Solvent-free mechanochemical preparation of Fe-N-C loaded MnO2 to efficiently activate peroxymonosulfate for norfloxacin degradation

被引：0

作者：

Zhang, Yifan ^{[1
]}

Ndayiragije, Sylvestre ^{[1
,2
]}

Chen, Ming ^{[1
]}

Wang, Xiaobo ^{[3
]}

Zhu, Lihua ^{[1
]}

Wang, Nan ^{[1
]}

机构：

[1] Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan

[2] CRSNE, Faculté des Sciences, Universié du Burundi, Bujumbura

[3] College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan

来源：

Chemical Engineering Journal | 2025年 / 520卷

基金：

中国国家自然科学基金;

关键词：

Ball milling; Fe-N-C; MnO[!sub]2[!/sub; Norfloxacin; Peroxymonosulfate;

D O I：

10.1016/j.cej.2025.165973

中图分类号：

学科分类号：

摘要：

Fe- and nitrogen-doped carbonaceous (Fe-N-C) sites supported on MnO2 (Fe-N-C@MnO2) were prepared by a solvent-free mechanochemical method for peroxymonosulfate (PMS) activation to degrade norfloxacin (NFX). After a 50-min ball milling of iron(II) phthalocyanine (Fe(II)Pc) and MnO2 at a weight ratio of 7.5 %, the obtained Fe-N-C@MnO2 exhibited exceptional activity in PMS activation, achieving nearly complete degradation of NFX in 5 min with a rate constant of 0.62 min−1. This rate constant was 11.5 and 28.2 times higher than that for milled MnO2 (bm-MnO2) and the mixture of Fe(II)Pc and MnO2, respectively. Alternative iron sources (FeSO4, FeCl2, Fe(III)-EDTA) and phthalocyanine showed no enhancement. Characterization revealed Fe-N-C@MnO2 possessed abundant Mn3+, oxygen vacancies and Fe-N-C sites. Combined experimental and computational studies demonstrated Fe-N-C@MnO2 simultaneously enhanced the 1O2 generation and facilitated the formation of SO4•−, •OH and O2•−, with contributions to NFX degradation following: 1O2 > •OH ≈ O2•− > SO4•−. This work establishes mechanochemical coordination engineering as a facile strategy for constructing high-performance metal-N-C hybrid catalysts. © 2025

引用

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