Crucial role of nitrogen vacancies in carbon activated persulfate toward nonradical abatement of micropollutants from secondary effluent

被引：15

作者：

Li, Fangzhou ^{[1
]}

Sun, Lu ^{[2
]}

Wang, Haojie ^{[1
]}

Dong, Heng ^{[1
]}

Li, Fei ^{[1
]}

Wu, Xiaoyan ^{[3
]}

Zhan, Sihui ^{[1
,4
]}

机构：

[1] Nankai Univ, Coll Environm Sci & Engn, MOE Key Lab Pollut Proc & Environm Criteria, Tianjin 300350, Peoples R China

[2] Nankai Univ, Inst Modern Opt, Tianjin Key Lab Microscale Opt Informat Sci & Tech, Tianjin 300350, Peoples R China

[3] Tianjin Recyclable Resources Inst, All China Federat Supply & Mkt Cooperat, Tianjin 300191, Peoples R China

[4] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300350, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2025年 / 361卷

基金：

中国国家自然科学基金;

关键词：

Micropollutants; Persulfate activation; Nonradical oxidation; N vacancy; Microelectric field; Secondary effluent; DOPED GRAPHENE; SINGLET OXYGEN; REDUCTION; OXIDATION; REMOVAL; DEFECT;

D O I：

10.1016/j.apcatb.2024.124584

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Biomass-derived carbonaceous materials exhibit fascinating potentials in nonradical oxidation of micropollutants (MPs) by activating persulfate and their performances mainly rest on graphitic N. However, the simultaneously derived N vacancy received little attention. Herein, a graphene-like material rich in N vacancy was synthesized from coffee residues. It showed excellent removal efficiency (95 %) and degradation kinetics (0.21 min(-1)) in abating tetracycline antibiotics from secondary effluent and significant biotoxicity was diminished. Solid nonradical oxidation consisting of electron transfer (89 %) and singlet oxygen (O-1(2)) oxidation (11 %) was determined. By tracking O-1(2) source and electron flow, ketone group appeared at N vacancy was found as the critical site to grab electrons from peroxydisulfate (PDS) with production of O-1(2). Then the electrons were transferred to graphitic N driven by the microelectric field between them. This work notices the function of vacancies in biomass resources for high-efficient removal of MPs from real water matrix.

引用

页数：11

共 61 条

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