The complex heterogeneous Fenton reactivity of transition metal-doped ferrihydrite: Insight from the structural variation and pathway of H2O2 activation

被引：12
|
作者：
Xie, Qingru [1 ,2 ]
Zhu, Yanping [1 ,3 ]
Xian, Haiyang [1 ,2 ]
Chen, Qingze [1 ,2 ]
Liu, Chengshuai [2 ,4 ]
Wu, Fei [2 ,4 ]
Liang, Xiaoliang [1 ,2 ]
Zhu, Runliang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] South China Agr Univ, Coll Nat Resources & Environm, Guangdong Prov Key Lab Agr & Rural Pollut Abatemen, Guangzhou 510642, Peoples R China
[4] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2023年 / 622卷
基金：
中国国家自然科学基金;
关键词：
Transition metal-doped ferrihydrite; Heterogeneous Fenton reaction; Oxygen vacancies; Reactive oxygen species; IMPURITY-BEARING FERRIHYDRITE; SURFACE-STRUCTURE; OXYGEN VACANCIES; METHYLENE-BLUE; IRON; OXIDATION; REDUCTION; CO; DEGRADATION; MAGNETITE;
D O I：
10.1016/j.apsusc.2023.156913
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Doping transition metal into ferrihydrite (Fh) may significantly affect its structure and Fenton reactivity. The comparative study of Fh and M(II)-Fh (M = Cu, Co, or Mn), for the first time, reveals that doping metal ions can alter the property and content of oxygen vacancy (OVs) and the oxidation potential of Fh, which subsequently affects H2O2 decomposition, HO. generation, and Fenton reactivity of the catalysts. The overall Fenton activity of the samples in decomposing bisphenol A decreases in the order Cu-Fh > Fh > Co-Fh > Mn-Fh. In specific, Cu-Fh is the most efficient catalyst as it has the lowest energy barrier for decomposing H2O2 into HO. at OVs sites and the highest oxidation potential (benefiting the reduction of Fe(III) to Fe(II) by H2O2). Our findings show the complex heterogeneous Fenton reactivity of M-Fh, and doping can be an efficient strategy for achieving highly efficient Fenton catalysts.
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页数：10
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