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首页> 外文期刊>Applied Surface Science >Enhanced visible light photocatalytic activity of copper-doped titanium oxide-zinc oxide heterojunction for methyl orange degradation
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Enhanced visible light photocatalytic activity of copper-doped titanium oxide-zinc oxide heterojunction for methyl orange degradation

机译：掺杂铜的氧化钛-氧化锌异质结对可见光的催化降解甲基橙的能力

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摘要

A novel Cu-doped TiO2 coupled with ZnO nanoparticles (Cu-TiO2/ZnO) was prepared by sol-gel method and subsequent precipitation for methyl orange (MO) photodegradation under visible light irradiation. The compositions and shapes of the as-prepared Cu-TiO2/ZnO nanocomposites were characterized by photoluthinescence spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, UV vis diffuse reflectance spectra and Brunauer Emmett Teller adsorption isotherm techniques. The Cu-TiO2/ZnO nanocomposites showed considerably higher photocatalytic activity for MO removal from water under visible light irradiation than that of single-doped semiconductors. The effects of Cu-TiO2 and ZnO mass ratios on the photocatalytic reaction were also studied. A coupling percentage of 30% ZnO exhibited the highest photocatalytic activity. The enhanced photocatalytic activity of the Cu-TiO2/ZnO nanocomposites was mainly attributed to heterojunction formation, which allowed the efficient separation of photoinduced electron hole pairs at the interface. Moreover, these novel nanocomposites could be recycled during MO degradation in a three-cycle experiment without evident deactivation, which is particularly important in environmental applications. (C) 2017 Elsevier B.V. All rights reserved.
机译：通过溶胶-凝胶法制备了一种新型的掺Cu的TiO2与ZnO纳米粒子（Cu-TiO2 / ZnO），随后进行沉淀，以在可见光照射下进行甲基橙（MO）的光降解。制备的Cu-TiO2 / ZnO纳米复合材料的组成和形状通过光致发光光谱，X射线衍射，X射线光电子能谱，场发射扫描电子显微镜，透射电子显微镜，紫外可见漫反射光谱和Brunauer Emmett进行表征。柜员吸附等温线技术。与单掺杂半导体相比，Cu-TiO2 / ZnO纳米复合材料在可见光照射下具有显着更高的光催化去除水中MO的活性。还研究了Cu-TiO2和ZnO质量比对光催化反应的影响。 30％ZnO的偶联百分比表现出最高的光催化活性。 Cu-TiO2 / ZnO纳米复合材料增强的光催化活性主要归因于异质结的形成，这使得界面处的光致电子空穴对得以有效分离。而且，这些新颖的纳米复合材料可以在三周期实验中的MO降解过程中循环使用，而没有明显的失活，这在环境应用中尤其重要。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第31期|251-261|共11页
  • 作者

    Dorraj Masoumeh; Alizadeh Mahdi; Sairi Nor Asrina; Basirun Wan Jefrey; Goh Boon Tong; Woi Pei Meng; Alias Yatimah;

  • 作者单位

    Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia;

    Univ Malaya, UMPEDAC, Level Wisma R&D 4, Jalan Pantai Baharu, Kuala Lumpur 59990, Malaysia;

    Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia|Univ Malaya, Fac Sci, Dept Chem, Ctr Ion Liquids, Kuala Lumpur 50603, Malaysia;

    Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia;

    Univ Malaya, Fac Sci, Dept Phys, Low Dimens Mat Res Ctr, Kuala Lumpur 50603, Malaysia;

    Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia|Univ Malaya, Fac Sci, Dept Chem, Ctr Ion Liquids, Kuala Lumpur 50603, Malaysia;

    Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia|Univ Malaya, Fac Sci, Dept Chem, Ctr Ion Liquids, Kuala Lumpur 50603, Malaysia;

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  • 正文语种 eng
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  • 关键词

    Cu-TiO2/ZnO; Heterojunction; Photocatalysts; Methyl orange; Visible light;

    机译：Cu-TiO2 / ZnO;异质结;光催化剂;甲基橙;可见光;

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