Iron–doped bismuth oxybromides as visible-light-responsive Fenton catalysts for the degradation of atrazine in aqueous phases  

作　　者：Yong-Li Cai Yu-Hang Xu Ji-Zun Xiang Zhi-Qiang Zhang Qiu-Xiang He Ya-Feng Li Jian Lü 

机构地区：[1]Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation,College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]State Key Laboratory of Photocatalysis on Energy and Environment,Fuzhou University,Fuzhou 350116,China

出　　处：《Journal of Environmental Sciences》2024年第3期321-332,共12页环境科学学报（英文版）

基　　金：supported by the Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment (No.SKLPEE–202008);the Fuzhou University;the Special Fund for Scientific and Technological Innovation of Fujian Agriculture and Forestry University (No.CXZX2019073G)。

摘　　要：Pesticides and its degradation products,being well–known residues in soil,have recently been detected in many water bodies as pollutants of emerging concerns,and thus there is a contemporary demand to develop viable and cost–effective techniques for the removal of related organic pollutants in aqueous phases.Herein,a visible-light-responsive Fenton system was constructed with iron–doped bismuth oxybromides(Fe–BiOBr)as the catalysts.Taking the advantage of sustainable Fe(Ⅲ)/Fe(Ⅱ)conversion and optimized H_(2)O_(2)utilization,the optimal Fe–BiOBr–2 catalyst showed an excellent atrazine removal efficiency of 97.61%in 120 min,which is superior than the traditional homogeneous Fenton and the majority of heterogeneous processes documented in the literature.In this photo–Fenton system,hydroxyl(·OH)and superoxide(·O_(2)^(-))radicals were dominant active species contributed to the oxidative degradation of atrazine.Due to the production of various active radicals,five degradation pathways were proposed based on the identification of intermediates and degradation products.Overall,this work not only demonstrates a fundamental insight into creating highly efficient and atom economic photo-Fenton systems,but also provides a complementary strategy for the treatment of organic pollutants in water.

关 键 词：Bismuth oxybromide Photo–Fenton ATRAZINE Catalytic degradation 

分 类 号：X592[环境科学与工程—环境工程] TQ426[化学工程]