Degradation of organic pollutants by Co3O4-mediated peroxymonosulfate oxidation: Roles of high-energy {001}-exposed TiO2support

doi:10.1016/j.cej.2017.11.078

	Degradation of organic pollutants by Co3O4-mediated peroxymonosulfate oxidation: Roles of high-energy {001}-exposed TiO2support
	Zhang, Ai-Yong 1; He, Yuan-Yi 1; Chen, You-Peng 2; Feng, Jing-Wei 1; Huang, Nai-Hui 1; Lian, Fei 3
刊名	Chemical Engineering Journal
	2018
卷号	334 页码:1430-1439
ISSN号	13858947
DOI	10.1016/j.cej.2017.11.078
英文摘要	Co3O4-mediated heterogeneous activation of peroxymonosulfate (PMS) is an efficient strategy to generate sulfate radicals for environmental pollutants degradation. The rate-limiting step is Co[sbnd]OH−complex formation, and it highly depends on the thermodynamic capacity of water dissociation to generate surface hydroxyl groups. Herein, for efficient PMS activation and pollutants degradation, the water dissociation capacity of TiO2, a promising Co3O4support, was facilely refined by its shape-tailored synthesis with dominant high-energy {0 0 1} facet. The polar {0 0 1} facet is characterized by a high density of atomic steps, edges and kinks of the low-coordinate surface atoms with a large number of dangling bonds, all of which can serve as reactive sites for water adsorption and dissociation and thus improve Co[sbnd]OH−complex formation dynamics in sulfate radical formation. Co3O4deposited on TiO2-{0 0 1} exhibited a much higher PMS activation capacity and pollutants degradation efficiency, i.e. p-nitrophenol and rhodamine B, and a much lower Co2+leaching. This superiority could be mainly attributed to the strong Ti5c-centered water adsorption and dissociation, the high density of surface hydroxyl groups, the robust Co[sbnd]OH−complex generation and the intimate catalyst-support interactions. Our findings might provide a new chance to refine Co-mediated sulfate radical generation and other Fenton-like systems for advanced water treatment with reduced secondary pollution. © 2017 Elsevier B.V.
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/8023]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.Department of Municipal Engineering, Hefei University of Technology, Hefei; 230009, China; 2.Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chongqing; 400714, China; 3.Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin; 300191, China
推荐引用方式 GB/T 7714	Zhang, Ai-Yong,He, Yuan-Yi,Chen, You-Peng,et al. Degradation of organic pollutants by Co3O4-mediated peroxymonosulfate oxidation: Roles of high-energy {001}-exposed TiO2support[J]. Chemical Engineering Journal,2018,334:1430-1439.
APA	Zhang, Ai-Yong,He, Yuan-Yi,Chen, You-Peng,Feng, Jing-Wei,Huang, Nai-Hui,&Lian, Fei.(2018).Degradation of organic pollutants by Co3O4-mediated peroxymonosulfate oxidation: Roles of high-energy {001}-exposed TiO2support.Chemical Engineering Journal,334,1430-1439.
MLA	Zhang, Ai-Yong,et al."Degradation of organic pollutants by Co3O4-mediated peroxymonosulfate oxidation: Roles of high-energy {001}-exposed TiO2support".Chemical Engineering Journal 334(2018):1430-1439.