高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (9): 1711.

• 研究论文 • 上一篇    下一篇

铕掺杂对纳米TiO2的光催化活性的影响

杨秋景1, 徐自力1, 谢超1, 薛宝永1, 杜尧国1, 张家骅2   

  1. 1. 吉林大学环境与资源学院, 长春130023;
    2. 中国科学院激发态物理开放研究实验室, 长春130023
  • 收稿日期:2003-08-29 出版日期:2004-09-24 发布日期:2004-09-24
  • 基金资助:

    国家自然科学基金(批准号:20277015)资助

Effect of Eu 3+ Doping on the Photocatalytic Activity of Nanoparticles TiO2

YANG Qiu-Jing1, XU Zi-Li1, XIE Chao1, XUE Bao-Yong1, DU Yao-Guo1, ZHANG Jia-Hua2   

  1. 1. College of Environment and Resources, Jilin University, Changchun 130023, China;
    2. Laboratory of Excited State Processes, Chinese Academy of Sciences, Changchun 130023, China
  • Received:2003-08-29 Online:2004-09-24 Published:2004-09-24

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摘要： 用溶胶-凝胶法制备了掺杂Eu3+的纳米TiO2,用XRD和TG-DTA对其进行了表征,并以正庚烷为气相有机污染物的实例研究了样品的光催化活性,发现Eu3+进入TiO2晶格中引起了TiO2晶格膨胀,导致晶格畸变增大,抑制了TiO2晶相的转变和粒径的增长.结果表明,Eu3+掺杂可提高TiO2的光催化活性,并且当掺杂摩尔分数为0.3%时,光催化活性最好.随着焙烧温度的升高,光催化活性下降,而利用较高的水解酸度则有利于得到光催化活性较高的样品.

关键词: Eu3+掺杂, TiO2制备, 光催化氧化活性

Abstract: The photocatalytic activities of Eu3+-doped TiO2 nanoparticles prepared by sol-gel method and characterized with XRD and TG-DTA were stidied via photocatalytic oxidation of n-heptane. The enhanced photocatalytic activity of Eu3+-doped TiO2 can be attributed to the fact that Eu3+ ions enter into the lattice of TiO2 to lead to the lattice expansion, enhancing the distortion of lattice, and inhibiting the crystal phase transformation and the increase of grain size. It is found that the x(Eu3+)= 0.3% was optimal, and the photocatalytic activity of Eu3+-doped TiO2 decreased with increasing the calcination temperature, and the higher the pH, the greater the photocatalytic activity.

Key words: Europium ion doping, Preparation of titanium dioxide, Photocatalytic oxidation activity

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