Peroxydisulfate activation by atomically-dispersed Fe-Nx on N-doped carbon: Mechanism of singlet oxygen evolution for nonradical degradation of aqueous contaminants

被引：145

作者：

Du, Ningjie ^{[1
,2
]}

Liu, Ying ^{[1
,2
]}

Li, Qiuju ^{[1
,2
]}

Miao, Wei ^{[1
,2
]}

Wang, Dandan ^{[1
,2
]}

Mao, Shun ^{[1
,2
]}

机构：

[1] Tongji Univ, Shanghai East Hosp, Biomed Multidisciplinary Innovat Res Inst, Coll Environm Sci & Engn,State Key Lab Pollut Con, 1239 Siping Rd, Shanghai 200092, Peoples R China

[2] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 413卷

基金：

国家重点研发计划;

关键词：

Single-atom iron; Peroxydisulfate oxidation; Singlet oxygen; Chloramphenicol; Organic contaminant removal; ZERO-VALENT IRON; PEROXYMONOSULFATE ACTIVATION; HETEROGENEOUS CATALYSIS; SELECTIVE DEGRADATION; BISPHENOL-A; CHLORAMPHENICOL; OXIDATION; NANOPARTICLES; PERSULFATE; NANOTUBES;

D O I：

10.1016/j.cej.2020.127545

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Single-atom catalysts have drawn increasing attention in advanced oxidation due to their unique structure and significant promise in heterogeneous catalysis. Herein, single-atom iron anchored on nitrogen-doped carbon (SAFe-N-C) was synthesized with iron phthalocyanine (FePc) and metal-organic framework (ZIF-8). With thermal treatment and acid leaching, atomically-dispersed Fe-Nx sites were successfully formed on the surface of N-C support derived from ZIF-8. The prepared catalyst was demonstrated to activate peroxydisulfate (PDS) for chloramphenicol (CAP) degradation. Compared with N-C, the SAFe-N-C shows 6 times enhanced removal efficiency (from 15.3% to 93.1%) for CAP. Moreover, the catalyst shows high catalytic activity in a wide pH range of 5 to 9 and good resistance to inorganic anions, in which a singlet oxygen-dominated process is found. This study reveals the role of single-atom site in singlet oxygen evolution and offers a new catalytic approach for selective removal of organic pollutants in complex water matrix.

引用

页数：12

共 74 条

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