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云师大化工学院赵学教授在top期刊《J Colloid Interf Sci》（胶体与界面科学杂志）发表最新研究成果

已有 1073 次阅读 2024-10-21 22:49 |个人分类:云师大研究|系统分类:论文交流

2024年10月20日，Elsevier 旗下top期刊《Journal of Colloid and Interface Science》（影响因子：9.4）在线发表了云南师范大学化学化工学院赵学教授、迟绍民教授以及云南大学胡广志教授最新研究成果《Interfacial anchoring cobalt species mediated advanced oxidation: Degradation performance and mechanism of organic pollutants》，第一作者单位为云南师范大学化学化工学院，云南师范大学化学化工学院赵学教授、迟绍民教授以及云南大学胡广志教授为共同通讯作者。合作单位还有大连大学。

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Abstract

The development of highly catalytic activity, low-cost and environmentally friendly catalysts is crucial for the use of advanced oxidation processes (AOPs) to treat organic pollutants. In this study, to reduce costs, enhance catalytic activity and avoid secondary pollution form metal ions, pomelo peel was used as raw material, combined with surface crystallization, carbon layer protection and heat treatment technology to effectively construct AOPs catalyst that can efficiently activate peroxymonosulfate (PMS) to degrade harmful organic pollutants. Under the optimal conditions, the Co/BC-PMS system can degrade about 100 % of tetracycline (TC, a spectral antibiotic) within 5 min, and the degradation rate of TC can still reach 100 % even if Co/BC (cobalt anchored on biochar) was reused for 6 times. The Co/BC-PMS system can resist complex environmental conditions, including acidic solution, alkaline solution, coexisting ions, different water quality, and is universal for the degradation of most organic pollutants. The integrated purification column with Co/BC as the core realizes the continuous and complete degradation of organic pollutants and has the ability of practical application. Radical capture and monitoring combined with density-functional-theory calculations confirmed that the Co(111) and amorphous CoO sites in Co/BC are the key to driving PMS to degrade organic pollutants, Co/BC can efficiently adsorb PMS and promote the dissociation of PMS into highly active radical dot OH, SO4− and 1O2, and these reactive oxygen species jointly promote the degradation of organic pollutants. This study provides experimental support and theoretical insights for the design of efficient AOPs catalysts, and plays an important role in promoting the development of AOPs.