催化学报

催化学报 ›› 2013, Vol. 34 ›› Issue (6): 1076-1086.DOI: 10.1016/S1872-2067(12)60569-5

• 研究论文 • 上一篇    下一篇

二氧化钛与针铁矿复合光催化材料的制备与光催化性能

谢伟淼a, 陈辉a, 张炫辉a, 胡仙超c, 李国华a,c   

  1. a 浙江工业大学化学工程与材料学院, 浙江杭州310032;
    b 浙江工业大学绿色化学合成技术国家重点实验室培育基, 浙江杭州310032;
    c 浙江工业大学分析测试中心, 浙江杭州310032
  • 收稿日期:2012-10-21 修回日期:2013-03-12 出版日期:2013-06-07 发布日期:2013-06-09
  • 通讯作者: 李国华
  • 基金资助:

    国家自然科学基金(21173193);浙江省自然科学基金(Y4080209,Y406094);浙江省化学工程与新材料研究生教育创新示范基地(2004);浙江省绿色化学合成技术重点科技创新团队专项(G1201101001601/001).

Preparation and photocatalytic activity of rutile TiO2 and goethitecomposite photocatalysts

XIE Weimiaoa, CHEN Huia, ZHANG Xuanhuia, HU Xianchaoc, LI Guohuaa,c   

  1. a School of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, Chin;
    b State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China;
    c Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
  • Received:2012-10-21 Revised:2013-03-12 Online:2013-06-07 Published:2013-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21173193), the Natural Science Foundation of Zhejiang Province (Y4080209, Y406094), the Innovative Demonstration Base for Postgraduate Education of Zhejiang Chemical Engineering and New Material (2004), and the Key Scientific Innovation Group for the Synthesis Technology of Green Chemistry of Zhejiang Province (G1201101001601/001).

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1134

被引次数

16

摘要：

以四氯化钛为钛源,针铁矿(α-FeOOH)为载体,采用水解沉淀法制备了金红石相二氧化钛(Ti2O)与α-FeOOH的复合光催化材料,并采用X射线衍射、扫描电子显微镜、透射电子显微镜、X射线能量散射谱和X射线光电子能谱对样品进行了表征.结果表明,低温下,金红石相Ti2O包覆于α-FeOOH表面,并形成复合结构;较高温下,铁离子进入金红石相Ti2O晶格,并形成铁掺杂金红石相Ti2O纳米管;中温下,样品兼有复合和掺杂两者特征.在室温下以甲基橙为降解对象,采用钨灯+氘灯(波长200~800nm)为光源,对样品的光催化活性进行了测试.结果表明,样品对甲基橙的光催化降解效果良好;与纯α-FeOOH和金红石相Ti2O相比,不同结构样品的光催化活性均有所提高,其中,复合兼掺杂型样品的光催化活性最高.由此可见,与α-FeOOH复合和铁掺杂是提高Ti2O光催化活性的有效途径.

关键词: 二氧化钛, 针铁矿, 复合材料, 光催化性能, 甲基橙

Abstract:

Rutile TiO2 and goethite (α-FeOOH) composite photocatalysts were fabricated by hydrolysis and precipitation using titanium tetrachloride as a precursor and α-FeOOH as a support. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The results show that at lower temperature, rutile TiO2 particles coat on the surface of α-FeOOH particles to form rutile TiO2-α-FeOOH composite photocatalyst. At higher temperature, iron ions are doped into the rutile TiO2 lattice to form iron-doped rutile TiO2 tubes; at medium temperature, the sample is a mixture with both composite and iron-doped structures. The photocatalytic activity of the samples is estimated by their ability to degrade methyl orange under irradiation with ultraviolet-visible light (200-800 nm) at ambient temperature. The photocatalytic activities of the samples are improved compared with that of pure rutile TiO2 and α-FeOOH. The sample containing a mixture of composite and iron-doped structures shows the highest photocatalytic activity of that investigated. As a result, the photocatalytic activity of Ti2O could be improved effectively by combining with α-FeOOH or doping iron.

Key words: Titanium dioxide, Goethite, Composite material, Photocatalytic activity, Methyl orange