Biochar-Based Single-Atom Catalyst with Fe-N3O-C Configuration for Efficient Degradation of Organic Dyes by Peroxymonosulfate Activation

被引：7
|
作者：
Xue, Xueyan [1 ,2 ,3 ]
Xue, Nan [1 ,2 ,3 ]
Ouyang, Dandan [1 ,2 ]
Yang, Liuqian [1 ,2 ,3 ]
Wang, Yanan [1 ,2 ,3 ]
Zhu, Hui [1 ,2 ]
Aihemaiti, Aikelaimu [1 ,2 ]
Yin, Jiao [1 ,2 ]
机构：
[1] Chinese Acad Sci, Lab Environm Sci & Technol, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
[2] Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2023年 / 15卷 / 49期
关键词：
biochar; single-atom catalyst; PMSactivation; singlet oxygen; organic dyes; ENVIRONMENTAL REMEDIATION; ADVANCED OXIDATION; XPS SPECTRA; RADICALS; GRAPHENE; CHARS;
D O I：
10.1021/acsami.3c12518
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Iron single-atom catalysts (Fe SACs) hold great promise for peroxymonosulfate (PMS) activation and degradation of organic pollutants in wastewater. However, insights into crucial catalytic sites and activation mechanisms of biochar-based Fe SACs for PMS remain a challenge. Herein, cotton stalk-derived biochar-based Fe SACs (Fe SACs-BC) with an asymmetric Fe-N/O-C configuration were prepared, and their PMS activation and acid orange 7 (AO7) degradation mechanisms were investigated. The results showed that the removal efficiency of the Fe SACs-BC catalyst with Fe-N3O-C configuration for AO7 and other five investigated organic dyes reached 95-99% within 15 min. The EPR spectrums, quenching experiments, electrochemical analysis, masking experiments, XPS, and theoretical calculations indicated that degradations of organic dyes were dominated by singlet oxygen, which was generated by direct PMS conversion at the electron-deficient carbon and iron sites in the Fe-N3O-C configuration. The Fe SACs-BC/PMS exhibited high removal efficiency and strong tolerance in different water matrices with a wide pH range, various coexisting anions and interfering substances, showing great potential and applicability for efficient treatment of actual textile wastewaters.
引用
收藏
页码：57003 / 57014
页数：12
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