物理化学学报 >> 2012, Vol. 28 >> Issue (09): 2169-2174.doi: 10.3866/PKU.WHXB201207041

催化和表面科学 上一篇    下一篇

浸渍-分解法制备高可见光催化活性的Bi2O3/TiO2纳米管阵列

戴高鹏, 刘素芹, 彭荣, 罗天雄   

  1. 湖北文理学院化学工程与食品科学学院, 湖北襄阳 441053
  • 收稿日期:2012-05-28 修回日期:2012-07-03 发布日期:2012-08-02
  • 通讯作者: 戴高鹏 E-mail:dgp2000@126.com
  • 基金资助:

    湖北省教育厅项目(T201215, Q20122507)资助

Fabrication of Bi2O3/Bi2O3 Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method

DAI Gao-Peng, LIU Su-Qin, PENG Rong, LUO Tian-Xiong   

  1. School of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, P. R. China
  • Received:2012-05-28 Revised:2012-07-03 Published:2012-08-02
  • Supported by:

    The project was supported by the Research Program of Hubei Province Department of Education, China (T201215, Q20122507).

摘要:

用浸渍-分解法将Bi2O3纳米颗粒沉积在TiO2纳米管壁上, 制备了Bi2O3/TiO2纳米管阵列. 用电感耦合等离子体发射光谱(ICP-AES)测定了Bi2O3/TiO2 纳米管阵列的化学组分, 利用X 射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和紫外-可见(UV-Vis)吸收光谱表征了所制备的样品. 通过在可见光下(λ>400 nm)降解甲基橙(MO)水溶液来评价样品的光催化活性. 结果表明, Bi2O3纳米颗粒均匀地沉积在TiO2纳米管中. Bi2O3/TiO2纳米管阵列具有比纯Bi2O3膜和N-TiO2纳米管阵列高得多的可见光催化活性. Bi2O3/TiO2纳米管阵列活性的增强是其强可见光吸收和Bi2O3与TiO2之间形成的异质结的协同作用的结果.

关键词: Bi2O3/TiO2纳米管阵列, 可见光, 光催化, 异质结, 协同作用

Abstract:

Bi2O3/TiO2 nanotube arrays (NTs) were prepared by depositing Bi2O3 nanoparticles (NPs) onto the tube wall of self-organized TiO2 NTs using an impregnation-decomposition method. Chemical composition of the resulting Bi2O3/TiO2 NTs was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. Photocatalytic activity was evaluated by degradation of aqueous methyl orange (MO) solution under visible-light irradiation (λ>400 nm). The Bi2O3 nanoparticles were found to be uniformly deposited into the nanotubes. Bi2O3/TiO2 NTs exhibited much higher visible-light activity than pure Bi2O3 films and N-TiO2 NTs, which was attributed to synergistic effects of the strong visible-light absorption of Bi2O3/TiO2 NTs and the heterojunction formed between Bi2O3 and TiO2.

Key words: Bi2O3/TiO2 nanotube array, Visible light, Photocatalysis, Heterojunction, Synergetic effect

MSC2000: 

  • O644