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ZnO纳米丛的制备及其光催化性能研究

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邹彩琼, 贾漫珂, 罗光富, 李瑞萍, 黄应平. ZnO纳米丛的制备及其光催化性能研究[J]. 环境化学, 2012, 31(6): 830-836.
引用本文: 邹彩琼, 贾漫珂, 罗光富, 李瑞萍, 黄应平. ZnO纳米丛的制备及其光催化性能研究[J]. 环境化学, 2012, 31(6): 830-836.
shu
ZOU Caiqiong, JIA Manke, LUO Guangfu, LI Ruiping, HUANG Yingping. Preparation and photocatalytic acitivity of ZnO nanobushes[J]. Environmental Chemistry, 2012, 31(6): 830-836.
Citation: ZOU Caiqiong, JIA Manke, LUO Guangfu, LI Ruiping, HUANG Yingping. Preparation and photocatalytic acitivity of ZnO nanobushes[J]. Environmental Chemistry, 2012, 31(6): 830-836.
shu

ZnO纳米丛的制备及其光催化性能研究

  • 1.

    三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌, 443002

  • 基金项目:

    国家自然科学基金(20877048,21177072)

    湖北省创新群体项目(2009CDA020)

    湖北省高等学校优秀中青年科技创新团队计划(T200703)资助.

Preparation and photocatalytic acitivity of ZnO nanobushes

  • 1.

    Engineering Research Center of Eco-environment, Three Gorges Reservoir Region, Ministry of Education, Yichang, 443002, China

  • Fund Project:

  • 摘要: 以沉淀法制备了高活性ZnO纳米丛(nanobushes,ZNB),以水热反应制备得到普通ZnO纳米颗粒(nanoparticles,ZNP).利用X射线衍射仪(XRD)、透射电镜(TEM)、扫描电镜(SEM)、比表面积测定仪(BET)和光致发光光谱(PL)等手段对ZNB和ZNP进行了表征,并比较了其光催化活性的差异.在紫外光(λ≤387 nm)照射40 min后ZNB使有机染料罗丹明B(Rhodamine B,RhB)完全褪色,而相同条件下ZNP仅能使RhB褪色53%.通过总有机碳(TOC)的测定,研究了ZnO对RhB深度氧化矿化程度,光照6 h后ZNB对RhB矿化率高达92%,而ZNP对RhB的矿化率只有77%.跟踪测定了光催化降解过程中活性氧化物种相对含量的变化,表明紫外光激发条件下,ZnO光催化反应机理主要涉及羟基自由基(·OH)历程,且ZNB产生活性氧化物种的量高于ZNP.
    Abstract: In this article, ZnO nanobushes (ZNB) with high photocatalytic activity were obtained by precipitation method, and regular ZnO nanoparticles (ZNP) were prepared by hydrothermal method. The prepared ZnO samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, the Brunauer-Emmett-Teller and photoluminescence spectroscopy. Under UV irradiation (λ≤387 nm), ZNB showed a better photocatalytic acitivity than ZNP, which only degraded 53% rhodamine B (RhB) in 40 min, while the former degraded it completely. The measurement of total organic carbon (TOC) showed that 92% RhB was mineralized in 6 h by ZNB, but only 77% by ZNP. Reactive oxygen species was detected by horseradish peroxidase spectro-photometry and benzoic acid flurescence. The results indicated that ZnO photocatalytic mechanism involved hydroxyl radicals, and ZNB produced more reactive oxygen species than ZNP. Degradation of 2,4-dichlorophenol (2,4-DCP) under UV irradiation was also used to test the photocatalytic activity of ZNB and ZNP.
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  • [1] Gaya U I, Abdullah A H, Hussein M Z, et al. Photocatalytic removal of 2,4,6-trichlorophenol from water exploiting commercial ZnO powder[J]. Desalination, 2010, 263: 176-182
    [2] Cao B Q, Cai W P. From ZnO nanorods to nanoplates: Chemical bath deposition growth and surface-related emissions[J]. J Phys Chem C, 2008, 112(3): 680-685
    [3] Daneshvar N, Salari D, Khatee A R. Photocatalytic degradation of azo dye acid red 14 in water on ZnO as an alternative catalyst to TiO2[J]. Journal of Photochemistry and Photobiology A: Chemistry, 2004, 162(2/3): 317-322
    [4] Chu D W, Yoshitake M, Tatsuki O, et al. Formation and photocatalytic application of ZnO nanotubes using aqueous solution[J]. Langmuir, 2009, 26(4): 2811-2815
    [5] Wang Y X, Li X Y, Wang N, et al. Controllable synthesis of ZnO nanoflowers and their morphology-dependent photocatalytic activities[J]. Separation and Purification Technology, 2008, 62: 727-732
    [6] Yu J G,Yu X X. Hydrothermal synthesis and photocatalytic acivity of zinc oxide hollow spheres[J]. Environ Sci Technol, 2008, 42(13): 4902-4907
    [7] Kharissova O V, Kharisov B I. Less-Common nanostructures in the forms of vegetation[J]. Ind Eng Chem Res, 2010, 49(22): 11142-11169
    [8] Freedsman J J, Kennedy L J, Kumar R T, et al. Studies on the structural and optical properties of zinc oxide nanobushes and Co-doped ZnO self-aggregated nanorods synthesized by simple thermal decomposition route[J]. Materials Research Bulletin, 2010, 45(10): 1481-1486
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  • 收稿日期:  2011-08-04
邹彩琼, 贾漫珂, 罗光富, 李瑞萍, 黄应平. ZnO纳米丛的制备及其光催化性能研究[J]. 环境化学, 2012, 31(6): 830-836.
引用本文: 邹彩琼, 贾漫珂, 罗光富, 李瑞萍, 黄应平. ZnO纳米丛的制备及其光催化性能研究[J]. 环境化学, 2012, 31(6): 830-836.
shu
ZOU Caiqiong, JIA Manke, LUO Guangfu, LI Ruiping, HUANG Yingping. Preparation and photocatalytic acitivity of ZnO nanobushes[J]. Environmental Chemistry, 2012, 31(6): 830-836.
Citation: ZOU Caiqiong, JIA Manke, LUO Guangfu, LI Ruiping, HUANG Yingping. Preparation and photocatalytic acitivity of ZnO nanobushes[J]. Environmental Chemistry, 2012, 31(6): 830-836.
shu

ZnO纳米丛的制备及其光催化性能研究

  • 1. 三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌, 443002
  • 收稿日期:  2011-08-04
基金项目:

国家自然科学基金(20877048,21177072)

湖北省创新群体项目(2009CDA020)

湖北省高等学校优秀中青年科技创新团队计划(T200703)资助.

摘要: 以沉淀法制备了高活性ZnO纳米丛(nanobushes,ZNB),以水热反应制备得到普通ZnO纳米颗粒(nanoparticles,ZNP).利用X射线衍射仪(XRD)、透射电镜(TEM)、扫描电镜(SEM)、比表面积测定仪(BET)和光致发光光谱(PL)等手段对ZNB和ZNP进行了表征,并比较了其光催化活性的差异.在紫外光(λ≤387 nm)照射40 min后ZNB使有机染料罗丹明B(Rhodamine B,RhB)完全褪色,而相同条件下ZNP仅能使RhB褪色53%.通过总有机碳(TOC)的测定,研究了ZnO对RhB深度氧化矿化程度,光照6 h后ZNB对RhB矿化率高达92%,而ZNP对RhB的矿化率只有77%.跟踪测定了光催化降解过程中活性氧化物种相对含量的变化,表明紫外光激发条件下,ZnO光催化反应机理主要涉及羟基自由基(·OH)历程,且ZNB产生活性氧化物种的量高于ZNP.

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