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MFeO（M = 钴、锰或锌）活化的光催化与过一硫酸盐在可见光照射下的协同效应以增强光催化活性。

Synergetic effect of photocatalysis and peroxymonosulfate activated by MFeO (M = Co, Mn, or Zn) for enhanced photocatalytic activity under visible light irradiation.

作者信息

Long Mingyang, Li Di, Li Hongmiao, Ma Xinguo, Zhao Qianqian, Wen Qi, Song Fang

机构信息

School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China

School of Science, Hubei University of Technology Wuhan 430068 China.

出版信息

RSC Adv. 2022 Jul 21;12(32):20946-20955. doi: 10.1039/d2ra03558h. eCollection 2022 Jul 14.

DOI:10.1039/d2ra03558h
PMID:35919161
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9301941/
Abstract

Nanosized MFeO (M = Co, Mn, or Zn) photocatalysts were synthesized a simple sol-gel method. MFeO photocatalysts exhibited lower photocatalytic activity for the degradation of levofloxacin hydrochloride under visible light irradiation. For enhancement of photocatalytic activity, MFeO was used to activate peroxymonosulfate and degrade levofloxacin hydrochloride under visible light irradiation. The influences of peroxymonosulfate dosage, levofloxacin hydrochloride concentration, pH value, and temperature on peroxymonosulfate activation to degrade levofloxacin hydrochloride were investigated in detail. The mechanism of activation of peroxymonosulfate by MFeO was proposed and proved by radical quenching experiments, electron spin resonance analysis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and transient photocurrent responses. The combined activation effects of photogenerated e/h and transition metals on peroxymonosulfate to produce sulfate radical clearly enhanced the degradation efficiency.

摘要

采用简单的溶胶-凝胶法合成了纳米尺寸的MFeO（M = Co、Mn或Zn）光催化剂。MFeO光催化剂在可见光照射下对盐酸左氧氟沙星的降解表现出较低的光催化活性。为了提高光催化活性，在可见光照射下使用MFeO活化过一硫酸盐并降解盐酸左氧氟沙星。详细研究了过一硫酸盐用量、盐酸左氧氟沙星浓度、pH值和温度对过一硫酸盐活化降解盐酸左氧氟沙星的影响。通过自由基猝灭实验、电子自旋共振分析、X射线光电子能谱、电化学阻抗谱和瞬态光电流响应，提出并证明了MFeO活化过一硫酸盐的机理。光生电子/空穴和过渡金属对过一硫酸盐产生硫酸根自由基的联合活化作用明显提高了降解效率。

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