期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 301, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120783
关键词
Metal-free catalyst; Reaction site; Water remediation; Singlet oxygen; Wide pH range
资金
- National Natural Science Foundation of China [22176170, 21976152]
- Outstanding Youth Project of Zhejiang Natural Science Foundation, China [LR21B070002]
A N/O-codoped carbon-based catalyst with dual reaction sites was fabricated for persulfate based advanced oxidation reaction, showing efficient catalytic removal of tetracycline in water treatment. Engineering and isolating the two reaction sites on catalyst surface greatly shortened the migration distance to the target organic molecule, providing insights for the design of effective non-metal based catalysts for practical water remediation.
A N/O-codoped carbon-based catalyst (N/O-C-8) designed with dual reaction sites (pyridinic N and carbonyl group) was fabricated in this work, for persulfate based advanced oxidation reaction. The pyridinic N served as the adsorption site for target molecule, via series of high resolution XPS analysis and DFT calculation. Meanwhile, the carbonyl group functioned as the persulfate activation site, to generate oxidative O-1(2). Engineering and isolating the two reaction sites on catalyst surface can greatly shorten the migration distance from O-1(2) to target organic molecule, resulting in good catalytic removal efficiency. As demonstrated, during a 4-hour continuous flow experiment, our catalyst showed stable and efficient removal of tetracycline, with a flow rate of 4 mL/min. The study provides keen insights into the design of effective non-metal based catalysts for practical water remediation.
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