中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (12): 1379-1386.DOI: 10.3724/SP.J.1095.2011.00022

• 研究论文 • 上一篇    下一篇

Fe掺杂对纳米TiO2薄膜的结构与光催化性能的影响

孟丹,王和义*,刘秀华,丁兰岚   

  1. (中国工程物理研究院核物理与化学研究所 绵阳 621900)
  • 收稿日期:2011-01-12 修回日期:2011-04-21 出版日期:2011-12-10 发布日期:2011-12-10
  • 通讯作者: 王和义，研究员; Tel/Fax:0816-2484261; E-mail:heyiwang@torn.com; 研究方向：催化化学，氚化学与氚工艺，辐射防护，放射化学
  • 基金资助:
    中国工程物理研究院科学技术发展基金（2009B030127）资助项目

Effects of Fe-Doping on the Structures and Photocatalytic Activities of TiO2 Thin Films

MENG Dan, WANG Heyi*, LIU Xiuhua, DING Lanlan   

  1. (Institute of Nuclear Physics and Chemistry，China Academy of Engineering Physics,Mianyang 621900)
  • Received:2011-01-12 Revised:2011-04-21 Published:2011-12-10 Online:2011-12-10

PDF

1672

被引次数

3

摘要：

采用溶胶-凝胶法制备了Fe掺杂的TiO2薄膜，利用X射线光电子能谱、X射线衍射技术、显微共聚焦拉曼光谱、紫外可见光谱和原子力显微镜等对薄膜进行表征，以甲基橙为反应模型对光催化活性进行测试。 结果表明，在300~600 ℃焙烧时，TiO2以锐钛矿结构存在，700 ℃焙烧时出现金红石结构。 随掺铁量和焙烧温度的增加，Fe/TiO2薄膜的表面粗糙度和晶粒尺寸均逐渐增大；随镀膜层数的增加，Fe/TiO2薄膜光谱吸收向可见光方向移动；较低含量的铁掺杂改善了TiO2薄膜的光催化活性，而较高含量的铁掺杂则使TiO2薄膜的光催化活性下降，掺铁量为0.1%时Fe/TiO2薄膜的光催化活性最好。

关键词: Fe/TiO2薄膜, 光催化降解, 反应机理, 甲基橙

Abstract:

The Fe-doped TiO2 films were prepared by sol-gel method and characterized by X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD), confocal microscope Raman spectrometer(Raman), UV-Vis absorption spectroscopy(UV-Vis) and atomic force microscopy(AFM). The photocatalytic activities of the films were evaluated by using the degradation of the methyl orange. The results showed that TiO2 in Fe/TiO2 films took an anatase structure when calcinated between 300 ℃ and 600 ℃. Increasing the calcination temperature up to 700 ℃, TiO2 transformed to rutile phase. The roughness and the grain size of Fe/TiO2 films grew gradually with the increases of the doping amount of Fe content and the calcination temperature. The photon excited wavelength of the Fe/TiO2 films moved to the visible light gradually with the increase of number of coating layer. Low levels of Fe-doping improved the photocatalytic activities of the TiO2 thin films, while higher doping decreased the photocatalytic activities of TiO2 thin films. The optimal Fe-doping was found to be 0.1% for the maximum degradation of methyl orange.

Key words: Fe doped TiO2 films, Photocatalytic degradation, Reaction Mechnism, Methyl orange

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