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Enhancement of the visible light activity and stability of Ag2CO3 by formation of AgI/Ag2CO3 heterojunction

文献类型：期刊论文

作者Yu, Changlin1; Wei, Longfu1,2; Zhou, Wanqin1; Chen, Jianchai1; Fan, Qizhe1; Liu, Hong3
刊名APPLIED SURFACE SCIENCE
出版日期2014-11-15
卷号319页码:312-318
关键词AgI Ag2CO3 Heterojunction Visible light Photocatalysis Methyl orange
ISSN号0169-4332
DOI10.1016/j.apsusc.2014.05.158
通讯作者Yu, CL (reprint author), Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China.
英文摘要An insurmountable problem for silver-based semiconductor photocatalysts is their poor stability. Here, at room temperature, AgI with different concentrations (5%, 10%, 20% and 30%) were coupled into Ag2CO3, producing a series of novel AgI/Ag2CO3 composite photocatalysts. The effects of AgI addition on the Ag2CO3 catalyst for photocatalytic degradation of methyl orange (MO) under visible light irradiation have been investigated. Some physicochemical technologies like N-2 physical adsorption/desorption, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS) were applied to characterize these products. Results show that the photocatalytic degradation activity of AgI/Ag2CO3 photocatalyst is much higher than that of pure AgI and Ag2CO3. With the optimal content of AgI (20 wt%), the AgI/Ag2CO3 exhibits the highest photocatalytic degradation efficiency. Its first order reaction rate constant (0.54 h(-1)) is 20 times of that of AgI (0.026 h(-1)) and 3.6 times of that of Ag2CO3 (0.15 h(-1)). The characterizations and theory calculation show that AgI and Ag2CO3 have suitably matched band gap structures. The formation of AgI/Ag2CO3 heterojunction with intimate interface could effectively increase the separation efficiency of the pairs and promote the production of " OH and Of radicals, which brings about the fast degradation rate of the dye and an increase in photocatalytic stability. (C) 2014 Elsevier B.V. All rights reserved.
资助项目National Natural Science Foundation of China[21067004] ; National Natural Science Foundation of China[21263005] ; Technological Foundation of Jiangxi Province Education Office[GJJ12344] ; Young Science and Technology Project of Jiangxi Province Natural Science Foundation[20133BAB21003] ; Young Scientist Training Project of Jiangxi Province[20122BCB23015] ; One Hundred Talents Program of Chinese Academy of Sciences
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:000344616000045
出版者ELSEVIER SCIENCE BV
源URL[http://119.78.100.138/handle/2HOD01W0/907]  
专题水污染过程与治理研究中心
通讯作者Yu, Changlin
作者单位1.Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China
2.Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China
3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Changlin,Wei, Longfu,Zhou, Wanqin,et al. Enhancement of the visible light activity and stability of Ag2CO3 by formation of AgI/Ag2CO3 heterojunction[J]. APPLIED SURFACE SCIENCE,2014,319:312-318.
APA Yu, Changlin,Wei, Longfu,Zhou, Wanqin,Chen, Jianchai,Fan, Qizhe,&Liu, Hong.(2014).Enhancement of the visible light activity and stability of Ag2CO3 by formation of AgI/Ag2CO3 heterojunction.APPLIED SURFACE SCIENCE,319,312-318.
MLA Yu, Changlin,et al."Enhancement of the visible light activity and stability of Ag2CO3 by formation of AgI/Ag2CO3 heterojunction".APPLIED SURFACE SCIENCE 319(2014):312-318.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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