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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (11): 1936-1940. 上一篇    下一篇

研究论文

Fe~(3+)掺杂的TiO_2纳米复合粒子的合成及表征

苏碧桃;张彰;郑坚;苏致兴   

  1. 西北师范大学化学化工学院,兰州(730070);兰州大学化学化工学院,兰州 (730000)
  • 发布日期:2002-11-15

Synthesis and Characterization of Fe~(3+)-doped TiO_2 Nanoparticles

Su Bitao;Zhang Zhang;Zheng Jian;Su Zhixing   

  1. College of Chemistry and Engineering, Northwest Normal University, Lanzhou(730070);College of Chemistry and Engineering, Lanzhou University,Lanzhou(730000)
  • Published:2002-11-15

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589

被引次数

132

利用酸催化的溶胶-凝胶法合成了一系列不同Fe~(3+)掺杂量的TiO_2纳米复合 料子。用XRD，TEM，UV-vis等技术进行了表征。结果表明：在所研究的掺杂量范围 内(x_B = 0.0005 ～0.1000),未发现有铁氧化物的晶相生成；Fe~(3+)的掺杂可以 实现TiO_2由锐钛矿(anatase)结构向金红石(rutile)结构的低温转化，随着Fe~ (3+)掺杂量的增大，对光的吸收发生红移，吸收强度增大。掺杂适量的Fe~(3+)可 以使TiO_2纳米微粒的光催化活性得以提高。

关键词: 铁, 二氧化钛, 纳米相材料, 溶胶-凝胶法, X射线衍射分析, 透射电子显微镜, 紫外分光光度法, 催化活性

TiO_2 nanoparticles, with different amounts of Fe~(3+)-doped, were synthesized using an acid-catalyzed sol-gel method and characterized by XRD, TEM, and UV-vis techniques. The results show that the absorption of Fe~(3+)/TiO_2 nanoparticles were largely red-shifted and the absorption intensities increased with increasing amounts of Fe~(3+) . The transition temperature of TiO_2 from anatase to rutile was lowered and the crystal phase of ferric oxide was not observed and the activities of TiO_2 nanophotocatalysts were enhanced due to the addition of Fe~(3+) into TiO_2.

Key words: IRON, TITANIUM DIOXIDE, NANOPHASE MATERIALS, SOL-GEL PROCESS, XRD, TEM, UV, CATALYTIC ACTIVITY

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