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Enhanced photocatalytic inactivation of Escherichia coli by a novel Z-scheme g-C3N4/m-Bi2O4 hybrid photocatalyst under visible light: The role of reactive oxygen species

文献类型：期刊论文

作者Xia, Dehua1; Wang, Wanjun2; Yin, Ran3; Jiang, Zhifeng1,4; An, Taicheng2; Li, Guiying2; Zhao, Huijun5,6; Wong, Po Keung1
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
出版日期2017-10-05
卷号214期号:无页码:23-33
关键词E. Coli Inactivation G-c3n4/m-bi2o4 Charge Transfer Z-scheme Bacterial Destruction
DOI10.1016/j.apcatb.2017.05.035
文献子类Article
英文摘要Biohazards are widely present in wastewater, and contaminated water can arouse various waterborne diseases. Therefore, effective removal of biohazards from water is a worldwide necessity. In this study, a novel all-solid-state Z-scheme g-C3N4/m-Bi2O4 heterojunction was constructed using a facile hydrothermal approach. Using the optimum g-C3N4/m-Bi2O4 (1:0.5), 6 logio cfu/mL of E. coli K-12 could be completely inactivated within 1.5 h under visible light irradiation, while only 1.2 log(10) cfu/mL and 3.2 log(10) of E. coli K-12 were inactivated by pure g-C3N4 and Bi2O4 under the same experimental conditions respectively. Emphasis was placed on identifying how the charge transfers across the g-C3N4/m-Bi2O4 heterojunction and a Z-scheme charge transfer mechanism was verified by reactive species trapping and quantification experiments. The Z-scheme charge separation within g-C3N4/m-Bi2O4 populated electrons and holes into the increased energy levels, thereby enabling one-step reduction of O-2 to H2O2 and facilitating more generation of holes. This greatly accelerated photocatalytic efficiency on the inactivation of E. coli. Moreover, microscopy images indicate that cell structures were damaged and intracellular components were leaked out during the photocatalytic inactivation process. This study suggests that the newly fabricated Z-scheme g-C3N4/m-Bi2O4 is a promising photocatalyst for water disinfection. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词DISINFECTION BY-PRODUCTS ; DOMESTIC WASTE-WATER ; BACTERIAL INACTIVATION ; DOPED TIO2 ; IRRADIATION ; CARBON ; DEGRADATION ; HYDROGEN ; G-C3N4 ; UV
WOS研究方向Chemistry ; Engineering
语种英语
WOS记录号WOS:000403059500003
资助机构Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; 41603097 ; 41603097 ; 41603097 ; 41603097 ; 41573086 ; 41573086 ; 41573086 ; 41573086 ; 41425015) ; 41425015) ; 41425015) ; 41425015) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Research Grant Council, Hong Kong SAR Government(GRF14100115) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; Technology and Business Development Fund of The Chinese University of Hong Kong(TBF15SCI008) ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; National Science Foundation of China(21607028 ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences(2015HSC-UE004) ; 41603097 ; 41603097 ; 41603097 ; 41603097 ; 41573086 ; 41573086 ; 41573086 ; 41573086 ; 41425015) ; 41425015) ; 41425015) ; 41425015)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/31888]  
专题合肥物质科学研究院_中科院固体物理研究所
作者单位1.Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China
2.Guangdong Univ Technol, Sch Environm Sci & Engn, Inst Environm Hlth & Pollut Control, Guangzhou 510006, Guangdong, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
4.Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Jiangsu, Peoples R China
5.Griffith Univ, Griffith Scholl Environm, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia
6.Chinese Acad Sci, Inst Solid State Phys, Lab Nanomat & Nanostruct, Hefei 230031, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Xia, Dehua,Wang, Wanjun,Yin, Ran,et al. Enhanced photocatalytic inactivation of Escherichia coli by a novel Z-scheme g-C3N4/m-Bi2O4 hybrid photocatalyst under visible light: The role of reactive oxygen species[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,214(无):23-33.
APA Xia, Dehua.,Wang, Wanjun.,Yin, Ran.,Jiang, Zhifeng.,An, Taicheng.,...&Wong, Po Keung.(2017).Enhanced photocatalytic inactivation of Escherichia coli by a novel Z-scheme g-C3N4/m-Bi2O4 hybrid photocatalyst under visible light: The role of reactive oxygen species.APPLIED CATALYSIS B-ENVIRONMENTAL,214(无),23-33.
MLA Xia, Dehua,et al."Enhanced photocatalytic inactivation of Escherichia coli by a novel Z-scheme g-C3N4/m-Bi2O4 hybrid photocatalyst under visible light: The role of reactive oxygen species".APPLIED CATALYSIS B-ENVIRONMENTAL 214.无(2017):23-33.

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来源：合肥物质科学研究院

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