Activating peroxymonosulfate by N and O co-doped porous carbon for efficient BPA degradation: A re-visit to the removal mechanism and the effects of surface unpaired electrons

被引：118

作者：

He, Yong-Li ^{[1
,2
]}

He, Chuan-Shu ^{[1
,2
]}

Lai, Lei-Duo ^{[1
,2
]}

Zhou, Peng ^{[1
,2
]}

Zhang, Heng ^{[1
,2
]}

Li, Ling-Li ^{[1
,2
]}

Xiong, Zhao-Kun ^{[1
,2
]}

Mu, Yang ^{[3
]}

Pan, Zhi-Cheng ^{[4
]}

Yao, Gang ^{[5
]}

Lai, Bo ^{[1
,2
]}

机构：

[1] Sichuan Univ, Coll Architecture & Environm, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China

[2] Sichuan Univ, Sino German Ctr Water & Hlth Res, Chengdu 610065, Peoples R China

[3] Univ Sci & Technol China, Dept Environm Sci & Engn, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China

[4] Haitian Water Grp, Lab Wastewater Treatment Technol Sichuan Prov, Chengdu 610065, Peoples R China

[5] Rhein Westfal TH Aachen, Inst Environm Engn, Aachen, Germany

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 314卷

基金：

中国国家自然科学基金;

关键词：

Bisphenol A degradation; PMS activation; Heteroatom doping; Unpaired electrons; Carbon catalysis; BISPHENOL-A; WASTE-WATER; PHOTOCATALYTIC ACTIVITY; NITRIDE NANOSHEETS; OXIDATION; NANOTUBES; SULFAMETHOXAZOLE; PERFORMANCE; OXYGEN; TRANSFORMATION;

D O I：

10.1016/j.apcatb.2022.121390

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：

In this study, N and O co-doping carbon materials with porous structure (NOPC-x) were applied to activate peroxymonosulfate (PMS) for bisphenol (BPA) degradation and the underlying effects in affecting NOPC-x activity were revealed. Electrochemical characterization, electron paramagnetic resonance (EPR) tests, quenching and PMS adsorption experiments were applied to clarify the mechanism of BPA degradation. It's found that BPA can be completely removed within 20 min (k(obs) = 0.30 min(-1)) in the NOPC/PMS system depending on the electron transfer path with the necessity of moderate surfaced unpaired electrons for electrons delivery, which could be regulated by the modifier dosage. However, excessive surfaced unpaired electrons were unfavorable to PMS adsorption, resulting in deterioration of BPA degradation. This study indicates that controlling the amount of surfaced unpaired electrons in an appropriate range is essential to ensure the carbonaceous materials activity in PMS activation to obtain a satisfactory BPA degradation.

引用

页数：13

共 49 条

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