Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions
	Zhang, Lili ; Wang, Zhiqiang ; Hu, Chun ; Shi, Baoyou
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2019-10-01
卷号	553 页码:598-605
关键词	Heterojunction nanocatalyst Strong interface interactions Pollutants Photodegradation
ISSN号	0021-9797
英文摘要	The solid-solid or solid-liquid interfaces are vital for the photocatalytic reaction. Herein, AgI nanoparticles (NPs) attached on the (0 1 1) plane of Ag2WO4 nanorods were synthesized by a facile method at room temperature. The co-crystalization of the two components caused their phase transformation and the existence of a strong interface interaction. Meanwhile, the porous batt-like morphology of Agl NPs provided more contact sites for organic pollutants to induce a strong interaction at the solid-liquid interface. The heterojunction nanocatalyst was found to be highly effective for the degradation and mineralization of various pollutants, including the endocrine-disrupting chemical bisphenol A, the antibiotics sulfamethoxazole and ciprofloxacin, and the azo-dye methyl orange under visible light (lambda > 420 nm). Its photocatalytic rate was 91, 52, and 39 times higher than that of bulk AgI, standard TiO2-xNx, and the physical mixture of the two components, respectively. Further studies demonstrated that the strong interactions between the two components and the pollutants promoted the electron transfer from organic pollutants to Agl NPs and then from Agl NPs to Ag2WO4 nanorods, resulting in the rapid oxidation of pollutants and the formation of Ag NPs. The newly formed Ag NPs further accelerated the degradation of pollutants due to a SPR effect and an empty levels feeding role to produce h(+) on Ag2WO4, which can oxidize surface adsorbed H2O into (OH)-O-center dot. This photocatalytic system provided a platform for understanding solid-solid and solid-liquid interface interaction and a novel design idea for water pollutants removal. (C) 2019 Published by Elsevier Inc.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43417]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
作者单位	1.Guangzhou Univ, Minist Educ, Key Lab Water Qual & Conservat Pearl River Delta, Inst Environm Res Greater Bay, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Tianjin Polytech Univ, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lili,Wang, Zhiqiang,Hu, Chun,et al. Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,553:598-605.
APA	Zhang, Lili,Wang, Zhiqiang,Hu, Chun,&Shi, Baoyou.(2019).Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,553,598-605.
MLA	Zhang, Lili,et al."Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 553(2019):598-605.