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Hg掺杂CdS的制备及可见光降解有毒有机污染物
引用本文:王攀,曹婷婷,方艳芬,罗光富,李瑞萍,黄应平. Hg掺杂CdS的制备及可见光降解有毒有机污染物[J]. 感光科学与光化学, 2011, 0(1)
作者姓名:王攀  曹婷婷  方艳芬  罗光富  李瑞萍  黄应平
作者单位:三峡大学三峡库区生态环境教育部工程研究中心;
基金项目:国家自然科学基金(20877048); 湖北省高校优秀中青年创新团队计划(T200703); 湖北省自然科学基金创新群体项目(2009CDA020); 三峡大学研究生创新基金(200962)
摘    要:采用镉硫共沉淀方法制备了Hg掺杂CdS(HgxCd1-xS)光催化剂,运用X射线衍射法(XRD)、X射线光电子能谱(XPS)、透射电镜(TEM)和紫外-可见吸收光谱对所制备的催化剂进行了表征;利用可见光催化降解罗丹明B(Rhodi-amine B,RhB)和2,4-二氯苯酚(2,4-dichlorophenol,2,4-DCP)为探针反应,对HgxCd1-xS可见光催化活性进行了研究,通过跟踪RhB降解过程中吸收光谱的变化和总有机碳(TOC),评价了HgxCd1-xS对有机物的氧化降解及深度矿化能力.结果表明:HgxCd1-xS催化剂为立方晶型,Hg的最佳掺杂量为5%,其禁带宽度约为2.15 eV,对RhB和2,4-DCP均有较好的降解效果,实验条件下30 min RhB褪色率为100%,RhB的30 h矿化率为45.5%,2,4-DCP的16 h降解率达55%.HgxCd1-xS可见光光催化降解RhB具有较高的稳定性,Hg的掺杂能有效降低CdS光腐蚀问题.通过ESR跟踪测定光催化反应过程中产生的自由基,表明降解过程涉及·OH机理.

关 键 词:共沉淀合成  CdS  Hg掺杂  可见光催化降解  

Preparation of Hg-Doped CdS and Degradation of Toxic Organic Pollutants under Visible Light Irradation
WANG Pan,CAO Ting-ting,FANG Yan-fen,LUO Guang-fu,LI Rui-ping,HUANG Ying-ping. Preparation of Hg-Doped CdS and Degradation of Toxic Organic Pollutants under Visible Light Irradation[J]. Photographic Science and Photochemistry, 2011, 0(1)
Authors:WANG Pan  CAO Ting-ting  FANG Yan-fen  LUO Guang-fu  LI Rui-ping  HUANG Ying-ping
Affiliation:WANG Pan,CAO Ting-ting,FANG Yan-fen,LUO Guang-fu,LI Rui-ping,HUANG Ying-ping(Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,China Three Gorges University,Yichang 443002,Hubei,P.R.China)
Abstract:Mercury doped CdS nanoparticles was prepared by co-precipitation method.The doped CdS nanoparticles were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),transmission electron microscope(TEM) and UV-Vis spectrum.The photo-catalytic degradation of Rhodamine B(RhB) and 2,4-dichlorophenol(2,4-DCP) under visible light were used as probe reactions to evaluate photo-catalytic activities by tracing the UV-Vis spectrum and the total organic carbon(TOC) changes.The results indicated that...
Keywords:co-precipitation  HgxCd1-xS  Hg-doped  Vis-photocatalysis  degradation  
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