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无机材料学报

• 研究论文 • 上一篇    下一篇

掺杂氧化铝对金红石相纳米TiO2微结构和光催化活性的影响

姚超1,2, 高国生2, 林西平2, 杨绪杰1, 陆路德1, 汪信1   

  1. 1. 南京理工大学化工学院, 南京 210094; 2. 江苏工业?学院, 常州 213016
  • 收稿日期:2004-11-15 修回日期:2005-03-16 出版日期:2006-01-20 网络出版日期:2006-01-20

Effect of Doping with Alumina on the Microstructure and Photo-catalytic Activity of Nanosized TiO2 in Rutile Phase

YAO Chao1,2, GAO Guo-Sheng2, LIN Xi-Ping2, YANG Xu-Jie1, LU Lu-De1, WANG Xin1   

  1. School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China; 2. Jiangsu Polytechnic University, Changzhou 213016, China
  • Received:2004-11-15 Revised:2005-03-16 Published:2006-01-20 Online:2006-01-20

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摘要： 为降低金红石相纳米TiO2的光催化活性, 利用氧化铝对其进行高温掺杂处理. 利用X射线衍射、X射线光电子能谱、透射电镜和比表面仪对纳米
TiO2进行了表征. 结果表明, 最佳的煅烧温度是800℃, 最佳的氧化铝用量是m(Al2O3):m(TiO2)=1:5. 氧化铝的掺杂抑制了纳米TiO2的
粒径和晶粒长大. 随着m(Al2O3):m(TiO2)的增大, 纳米TiO2的粒径和晶粒尺寸逐渐减少, 比表面积和孔容逐渐增大. 从电子结合能和晶胞参数
的变化可以推测高温煅烧可使Al3+掺杂到纳米TiO2的晶格中. 氧?化铝的饱和掺杂量约为m(Al2O3):m(TiO2)=1:20, 当m(Al2O3):m(TiO2)≥1:10?时, 出现了晶态氧化铝的结构.

关键词: 纳米TiO2, 金红石, 氧化铝, 掺杂, 光催化活性

Abstract: The nanosized TiO2 in the rutile phase was doped with alumina to suppress its photo-catalytic activity. The obtained samples were characterized by XRD, XPS, TEM and BET techniques.
The results show that the optimal calcination temperature is 800℃, and the optimal Al2O3 concentration is m(Al2O3):m(TiO2)=1:5.
The growth of crystalline size and particle size is suppressed from adulteration. With the increase of m(Al2O3):m(TiO2), the crystalline size and
particle size of nanosized TiO2 decrease progressively, at the same time, the BET surface area and pore volume of nanosized TiO2 increase. According
to the difference of electron binding energy and the variety of unit cell parameters, it can be inferred that the lattice of nanosized TiO2 is doped
with Al3+. The saturated concentration of dopant is m(Al2O3):m(TiO2)=1:20. When m(Al2O3):m(TiO2)≥1:10, the crystal
structure of alumina appears.

Key words: nanosized TiO2, rutile, alumina, doping, photo-catalytic activity

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