文献类型：期刊文献

英文题名：Dual anchoring strategy for single-atom Fe catalysts: Insights into 1O2-driven oxidation of organic contaminants

作者：Yuan, Cong[1];Zhu, Xiaoxiao[1];Xu, Xuyang[1];Ding, Fengyun[2];Zhou, Lei[1,3];Chovelon, Jean-Marc[4];Cen, Wanglai[2];Tian, Chengcheng[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610000, Sichuan, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[4]Univ Lyon, Univ Claude Bernard Lyon, CNRS, IRCELYON, F-69626 Villeurbanne, France

年份：2026

卷号：14

期号：2

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20260419948041);WOS:【SCI-EXPANDED(收录号:WOS:001674941100001)】；

基金：This work was finically supported by the National Natural Science Foundation of China (NSFC, Grant No. 52170109) , the Shanghai Science and Technology Innovation Plan (22DZ1208600) , the Innovation Program of Shanghai Municipal Education Commission (2023ZKZD41) and the key project of the National Natural Science Foundation of China (52030001) .

语种：英文

外文关键词：Single-atom; Fenton-like reactions; Peroxymonsulfate; Singlet oxygen; Superoxide anion radical

摘要：Single-atom catalysts (SACs), known for their maximized atom utilization and unique electronic structures, were widely utilized in Fenton-like reactions for organic contaminant removal. Due to prolonged use or complex reaction environments, the active sites were prone to oxidation, agglomeration, or carrier degradation, leading to deactivation. Herein, a single-site Fe catalyst anchored on N-doped carbon nanotubes (FeSA-N-CNT) was successfully synthesized by a dual anchoring strategy of EDTA and melamine. FeSA-N-CNT catalyst exhibited an outstanding performance in peroxymonosulfate (PMS) activation, achieving more than 90 % removal of sulfasalazine (SSZ) within 10 min. Combined experimental results and density functional theory (DFT) calculations revealed that the Fe-pyridine N-4 coordination sites and the adjacent carbon atoms (sub-C) served as dual active sites, facilitating a singlet oxygen (O-1(2))-dominated oxidation of SSZ. Fe-N-4 sites could promote the formation of SO5 center dot-, which subsequently generated O-1(2), while the sub-C sites contributed to the generation of superoxide anion radical (O-2(center dot-)), a precursor of O-1(2). The present study provided a novel strategy for synthesizing highly active SACs and deeper insights into the mechanisms of reactive oxygen species (ROS) generation within SACs/PMS systems for effective organic pollutant decontamination.