Bactericidal activity and mechanism of AgI/AgBr/BiOBr0.75I0.25 under   visible light irradiation

doi:10.1016/j.colsurfb.2015.11.060

CORC > 北京大学 > 环境科学与工程学院

	Bactericidal activity and mechanism of AgI/AgBr/BiOBr0.75I0.25 under visible light irradiation
	Liang, Jialiang ; Deng, Jun ; Li, Mian ; Tong, Meiping
刊名	COLLOIDS AND SURFACES B-BIOINTERFACES
	2016
关键词	AgI/AgBr/BiOBr0.75I0.25 Inactivation activity Active species Direct contact Reusability DRIVEN PHOTOCATALYTIC INACTIVATION SUNLIGHT-MEDIATED INACTIVATION E.-COLI K-12 WATER DISINFECTION ESCHERICHIA-COLI HIGHLY EFFICIENT SILVER NANOPARTICLES BIOBR NANOSHEETS SINGLET OXYGEN MS2 COLIPHAGE
DOI	10.1016/j.colsurfb.2015.11.060
英文摘要	The Agl/AgBr/BiOBr0.75I0.25 nanocomposites were synthesized by a solvothermal process, followed by an in-situ ion exchange reaction. The disinfection activities of the as-synthesized photocatalyst to model cell type, Gram-negative Escherichia coli (E. coli), were investigated under visible light irradiation condition lambda >= 400 nm). Results showed that 80 mg/L AgI/AgBr/BiOBr0.75I0.25 could completely inactivate 3 x 10(7) CFU mL(-1) E. coli cells within 30 mm under visible light irradiation. Moreover, the bactericidal mechanisms involved in the photocatalytic disinfection process were systematically investigated. Ag+ ions released from the nanocomposites negligibly contributed to the bactericidal activity, while active species including h(+), e(-) and O-center dot(2)- played important roles in the disinfection system. Direct contact of bacterial cells and nanoparticles was found to be the prerequisite for both the generation of O-center dot(2)- and the disinfection processes. The disruption of cell membrane and emission of cytoplasm directly inactivated E. coil cells. In addition, AgI/AgBr/BiOBr0.75I0.25 exhibited strong antibacterial activity toward E. coli even in four consecutive reused cycles. (C) 2015 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [41422106, 21377006]; program for New Century Excellent Talents in University [NCET-13-0010]; SCI(E); EI; PubMed; ARTICLE; tongmeiping@pku.edu.cn; 102-109; 138
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435847]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Liang, Jialiang,Deng, Jun,Li, Mian,et al. Bactericidal activity and mechanism of AgI/AgBr/BiOBr0.75I0.25 under visible light irradiation[J]. COLLOIDS AND SURFACES B-BIOINTERFACES,2016.
APA	Liang, Jialiang,Deng, Jun,Li, Mian,&Tong, Meiping.(2016).Bactericidal activity and mechanism of AgI/AgBr/BiOBr0.75I0.25 under visible light irradiation.COLLOIDS AND SURFACES B-BIOINTERFACES.
MLA	Liang, Jialiang,et al."Bactericidal activity and mechanism of AgI/AgBr/BiOBr0.75I0.25 under visible light irradiation".COLLOIDS AND SURFACES B-BIOINTERFACES (2016).