Visible-light activation of peroxymonosulfate by NiCo2O4/Bi24O31Br10 to accelerate tetracycline degradation

被引：26
|
作者：
Song, Yueyu [1 ,2 ]
Jiang, Jingjing [1 ,2 ]
Ma, Yuhan [1 ,2 ]
Li, Tianren [1 ,2 ]
Dong, Shuangshi [1 ,2 ]
机构：
[1] Jilin Univ, Minist Educ, Key Lab Groundwater Resources & Environm, Changchun 130021, Jilin, Peoples R China
[2] Jilin Univ, Jilin Prov Key Lab Water Resources & Environm, Changchun 130021, Jilin, Peoples R China
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2021年 / 11卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Light - Chemical stability - Wastewater treatment - Chemical activation - Electron spin resonance spectroscopy - Free radicals;
D O I：
10.1039/d0cy02245d
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：
The activation of peroxymonosulfate (PMS) by a bimetallic oxide, such as NiCo2O4, has attracted much attention from researchers because of its low energy and high stability. However, the application of the SR-Fenton-like system is limited by serious ion leaching. In this study, we synthesized a stable NiCo2O4/Bi24O31Br10 catalyst to efficiently degrade tetracycline in a PMS/visible light system. The 45% NiCo2O4/Bi24O31Br10 had remarkable degradation performance (90.3%) within 18 min. This was mainly due to the rapid transformation of Co2+/Co3+ and Ni2+/Ni3+ and enhancement in free radical production via Bi24O31Br10. The free radical capture experiment and electron spin resonance (ESR) results showed that SO4-/h(+)/HO/O-1(2) were the main active species in the tetracycline degradation. The cyclic experiment exhibited that the catalyst had high chemical stability. The possible degradation pathway of TCH was proposed. This study developed a stable and efficient PMS photo-activator for the treatment of wastewater.
引用
收藏
页码：2110 / 2118
页数：9
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