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载铈纳米TiO2粉体的制备及其反射光谱特性研究
引用本文:刘雪峰,张利,涂铭旌.载铈纳米TiO2粉体的制备及其反射光谱特性研究[J].光谱学与光谱分析,2005,25(2):274-276.
作者姓名:刘雪峰  张利  涂铭旌
作者单位:1. 北京科技大学材料科学与工程学院,北京,100083;四川大学金属材料系,四川,成都,610065
2. 北京科技大学图书馆,北京,100083
3. 四川大学金属材料系,四川,成都,610065
摘    要:采用金属离子组装技术对纳米TiO2进行了稀土元素铈的负载,借助X射线衍射和透射电子显微镜对载铈纳米TiO2粉体进行了表征,并用紫外-可见光漫反射光谱法对载铈前后纳米TiO2粉体的反射光谱特性进行了分析。结果发现:稀土元素铈负载后,纳米TiO2的反射光谱特性向可见光方向移动,红移到了500nm;并且在可见光区域的吸光率也发生了明显变化,提高了3倍。表明稀土元素铈的负载有利于提高纳米锐钛矿型TiO2对可见光和紫外光的吸收,从而大幅度提高其光催化活性。

关 键 词:粉体  纳米TiO2  并用  吸光率  制备  可见光区  负载  谱特性  漫反射光谱  锐钛矿型
文章编号:1000-0593(2005)02-0274-03
修稿时间:2003年9月19日

Preparation of Ce-Loaded Nano-TiO2 and Study on Its UV-Vis Reflective Spectrum
LIU Xue-feng,ZHANG Li,TU Ming-jing.Preparation of Ce-Loaded Nano-TiO2 and Study on Its UV-Vis Reflective Spectrum[J].Spectroscopy and Spectral Analysis,2005,25(2):274-276.
Authors:LIU Xue-feng  ZHANG Li  TU Ming-jing
Institution:School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Abstract:Ce-loaded nano-TiO_2 was prepared by the loading technology of metallic ions, and was characterized by XRD and TEM. The UV-Vis reflective spectra of nano-TiO_2 and Ce-loaded nano-TiO_2 were analyzed. The result shows that after loading rare earth element Ce the reflective spectral characteristic of nano-TiO_2 moves to the visible region with a red shift to 500 nm, and the obvious change takes place in the absorbance in the visible spectral range with a three-fold enhancement. It is indicated that the load of rare earth element Ce is favorable to enhancing the absorption of visible and UV light of anatase nano-TiO_2, and thereby greatly increases its photocatalytic activity.
Keywords:Rare earth element  Nanometer anatase titanium oxide  UV-Vis reflective spectrum
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