Hg掺杂CdS的制备及可见光降解有毒有机污染物

doi:10.7517/j.issn.1674-0475.2011.01.11

影像科学与光化学 ›› 2011, Vol. 29 ›› Issue (1): 11-23.DOI: 10.7517/j.issn.1674-0475.2011.01.11

Hg掺杂CdS的制备及可见光降解有毒有机污染物

王攀, 曹婷婷, 方艳芬, 罗光富, 李瑞萍, 黄应平

三峡大学三峡库区生态环境教育部工程研究中心, 湖北宜昌 443002

收稿日期:2010-06-23 修回日期:2010-09-01 出版日期:2011-01-23 发布日期:2011-01-23
通讯作者: 黄应平E-mail:chem_ctgu@126.com.
基金资助:
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)

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

Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, Hubei, P. R. China

Received:2010-06-23 Revised:2010-09-01 Online:2011-01-23 Published:2011-01-23

摘要/Abstract

摘要： 采用镉硫共沉淀方法制备了Hg掺杂CdS(Hg_xCd_1-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Hg_xCd_1-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Hg_xCd_1-xS对有机物的氧化降解及深度矿化能力.结果表明:Hg_xCd_1-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%.Hg_xCd_1-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

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 the best mole rate of Hg was 5% of the total metal amounts with the cubic phase crystal,and the band gap of Hg_0.05Cd_0.95S was 2.15 eV.In 30 minutes,the decolouration of RhB was 100% and the mineralization ratio of RhB was 45.5% in 30 hours,the mineralization of 2,4-DCP was up to 55% in hours with a high stability,the dop of the Hg can efficiently inhibit the photo-corrosion of CdS.The mechanism of degradation were evaluated by electron spin resonance (ESR),the findings showed that the degradation process involved hydroxyl radical course.

Key words: co-precipitation, Hg_xCd_1-xS, Hg-doped, Vis-photocatalysis, degradation

中图分类号:

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]. 影像科学与光化学, 2011, 29(1): 11-23.

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]. Imaging Science and Photochemistry, 2011, 29(1): 11-23.

参考文献

[1] Singh R S,Rangari V K,Sanagapalli S,et al.Nano-structured CdTe,CdS and TiO₂ for thin film solar cell applications[J].Solar Energy Materials and Solar Cells,2004,82(1-2):315-330.
[2] 曹莹,白雪峰.负载型纳米CdS制备及催化分解水制氢的研究进展[J].影像科学与光化学,2009,27(3):225-232.Cao Y,Bai X F.Progress in research of preparation of loaded nano-CdS and H₂ production by photocatalytic decomposition of water[J].Photographic Science and Photochemistry (Imaging Science and Photochemistry),2009,27(3):225-232.
[3] Wang C Y,Shang H M,Tao Y,et al.Properties and morphology of CdS compounded TiO₂ visible-light photocatalytic nanofilms coated on glass surface[J].Separation and Purification Technology,2003,32(1-3):357-362.
[4] Wang L,Wang L Y,Zhu C Q,et al.Preparation and application of functionalized nanoparticles of CdS as a fluorescence probe[J].Analytica.Chimica.Acta.,2002,468 (1):35-41.
[5] 万李,冯嘉猷.CdS/TiO₂复合半导体薄膜的制备及其光催化性能[J].环境科学研究,2009,22(1):95-98.Wan L,Feng J Y.Preparation and photocatalytic study of coupled semiconductor CdS/TiO₂ films[J].Research of Environmental Sciences,2009,22 (1):95-98.
[6] Bao N Z,Shen L M,Tsuyoshi T,et al.Facile Cd thiourea complex thermolysis synthesis of phase-controlled CdS nanocrystals for photocatalytic hydrogen production under visible light[J].J.Phys.Chem.C,2007,111(47):17527-17534.
[7] 杜娟,李越湘,彭绍琴,等.用水热、溶剂热方法制备纳米CdS 粒子及其光催化性能[J].功能材料,2005,10 (36):1603-1606.Du J,Li Y X,Peng S Q,et al.Preparation of nanocrystalline CdS by hydrothermal or solvent thermal process and its photocatalytic performance[J].Functional Materials,2005,10 (36):1603-1606.
[8] Wang Y Q,Cheng H M,Zhang L,et al.The preparation,characterization,photoelectrochemical and photocatalytic properties of lanthanide metal-ion-doped TiO₂ nanoparticles[J].Journal of Molecular Catalysis A:Chemical,2000,151(1-2):205-216.
[9] 黄应平,肖峰峰,方艳芬,等.掺B 纳米TiO₂ 制备及可见光催化降解有机污染物[J].华中科技大学学报,2009,37 (7):129-132.Huang Y P,Xiao F F,Fang Y F,et al.Preparation of B-doped TiO₂ and degradation of toxic organic pollutants by visible light-catalysis[J].Huazhong Univ.of Sci.& Tech.,2009,37 (7):129-132.
[10] Zhou S M.Photoluminescence of Hg-doped CdS nanowires[J].Phys.Stat.Sol.,2006,203 (6):R45-R47.
[11] 陈晓慧,柳丽芬,杨凤林,等.CdS/ TiO₂ 光催化去除水体中氨氮的研究[J].感光科学与光化学,2007,25(2):89-101.Chen X H,Liu L F,Yang F L,et al.Removing ammonia nitrogen from water using CdS/TiO₂ photocatalys[J].Photographic Science and Photochemistry,2007,25(2):89-101.
[12] Munaf E,Zein R,Kurniadi I.The use of rice husk for removal of phenol from wastewater as studied using 42 aminoantipyrine spectrophotometric method[J].Environ.Sci.Echnol.,1997,18:355-358.
[13] Bader H,Sturzenegger V,Hoigne J.Photometric method for the determination of low concentrations of hydrogen peroxide by the peroxidase catalyzed oxidation of N,N-diethyl-p-phenylenediamine (DPD)[J].Water Res.,1988,22(9):1109-1115.
[14] Chena S,Paulose M,Ruana C,et al.Electrochemically synthesized CdS nanoparticle-modified TiO₂ nanotube array photoelectrodes:Preparation,characterization,and application to photoelectrochemical cells[J].Journal of Photochemistry and Photobiology A:Chemistry,2006,177:177-184.
[15] Ren T,Xu S,Zhao W B,et al.A surfactant-assisted photochemical route to single crystalline HgS nanotubes[J].Journal of Photochemistry and Photobiology A:Chemistry,2005,173:93-98.
[16] Kar S,Santra S,Heinrich H.Fabrication of high aspect ratio core shell CdS-Mn/ZnS nanowires by a two step solvothermal process[J].J.Phys.Chem.C,2008,112(11):4036-4041.
[17] 张霞,赵岩,张彩碚.TiO₂Fe₂O核-壳粒子的制备及光学性能[J].材料研究学报,2005,19(4):343-348.Zhang X,Zhao Y,Zhang C B.Synthesis and optic character of TiO₂/Fe₂O₃ core-shell particles[J].Chinese Journal of Materials Research,2005,19 (4):343-348.
[18] Fu H B,Zhang S C,Xu T G,et al.Photocatalytic degradation of RhB by fluorinated Bi2WO6 and distributions of the intermediate products[J].Environ.Sci.Technol.,2008,42(6); 2085-2091.
[19] Yang J,Chen C,Ji H,et al.Mechanism of TiO₂-assisted photocatalytic degradation of dyes under visible irradiation:photoelectrocatalytic study by TiO₂-film electrodes[J].J.Phys.Chem.B,2005,109(46):21900-21907.
[20] Wang C Y,Christoph B,Detlef W B,et al.A comparative study of nanometer sized Fe(III)-doped TiO₂ photocatalysts:synthesis,characterization and activity[J].J.Mater.Chem.,2003,13:2322-2329.
[21] 陈燕,黄应平,潘家荣,等.正/反相胶束法制备纳米TiO₂及其光催化降解有毒有机污染物[J].纳米科技,2009,6(1):41-47.Chen Y,Huang Y P,Pan J R,et al.Synthesis nano-TiO₂ particles in normal and reverse micelles system and their photocatalytic activitiy for degradation of organic toxic pollutant[J].Nanoscience & Nanotechnology,2009,6(1):41-47.
[22] Khan R,Kim T L.Preparation and application of visible-light-responsive Ni-doped and SnO2-coupled TiO₂ nanocomposite photocatalysts[J].Journal of Hazardous Materials,2009,169(933):1179-1184.

Hg掺杂CdS的制备及可见光降解有毒有机污染物

Preparation of Hg-Doped CdS and Degradation of Toxic Organic Pollutants under Visible Light Irradation

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	郭瑜桉, 张直峰, 申晨凡, 闫桂琴. 基于CdSe/ZnS量子点构建丝裂霉素荧光检测体系的研究[J]. 影像科学与光化学, 2016, 34(4): 346-354.
[2]	张国强, 曲丹, 苗湘, 张晓燕, 孙再成. CdS超薄片层包覆TiO₂中空结构复合材料的形成和应用[J]. 影像科学与光化学, 2015, 33(5): 374-382.
[3]	焦勇, 李荣霞, 安文汀, 李世琴, 赵俊红. CdTe量子点与蛋白质相互作用的荧光猝灭效应[J]. 影像科学与光化学, 2014, 32(2): 181-190.
[4]	刘君子, 王攀, 何燕, 邓安平, 李瑞萍, 黄应平. CdS修饰TiO₂纳米带制备及光催化降解有毒有机污染物[J]. 影像科学与光化学, 2010, 28(3): 161-172.
[5]	曹莹, 白雪峰. 负载型纳米CdS制备及催化分解水制氢的研究进展[J]. 影像科学与光化学, 2009, 27(3): 225-232.
[6]	徐占霞, 崔冠军, 张敏, 杨建军. 新型CdS/TiO₂纳米复合材料的制备及其可见光催化性能研究[J]. 影像科学与光化学, 2008, 26(6): 489-498.
[7]	杨莉, 吴光辉, 周韦, 时武龙. TiO₂薄膜光催化还原Hg²⁺的研究[J]. 影像科学与光化学, 2005, 23(6): 460-466.
[8]	朱伊萍, 张金龙. 反胶束法原位合成P25-MPTMS-CdS及光化学性能研究[J]. 影像科学与光化学, 2004, 22(4): 244-250.
[9]	冯彩霞, 金振声, 杨建军, 王晓冬, 李昱昊, 张治军, 赵进才. 镶嵌CdS的纳米管钛酸制备及其光催化性能研究[J]. 影像科学与光化学, 2004, 22(4): 272-276.
[10]	王维波, 林瑞峰, 林原, 萧绪瑞, 陈旭光, 杨勇. 电化学沉积CdSe纳晶薄膜的性能及沉积机理[J]. 影像科学与光化学, 1998, 16(2): 177-181.
[11]	王岚, 鲍崇林, 王给祥. 光敏CdS粉的制备与性能研究[J]. 影像科学与光化学, 1997, 15(4): 371-374.
[12]	冯良波, 汪汉卿. 光催化乙醇水溶液脱氢的EPR研究[J]. 影像科学与光化学, 1992, 10(3): 237-242.
[13]	肖绪瑞, 林原, 李学萍. 拉氏变换阻抗分析测量CdSe薄膜电极的表面态[J]. 影像科学与光化学, 1991, 9(4): 295-298.
[14]	刘顺林, 钱道荪, 孙璧媃. n-CdSe/Fe(CN)₆^4-/3-光阳极上的光氧化竞争反应及用L-B技术修饰电极的影响[J]. 影像科学与光化学, 1990, 8(4): 284-290.
[15]	黎甜楷, 陈景荣. 吡啶-氯化钾水溶液/n型硫化镉电极界面上的表面增强喇曼散射[J]. 影像科学与光化学, 1988, 6(4): 30-35.