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无机材料学报

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TiO2纳米粒子的结构、表面特性及其光催化活性研究

尚静; 徐自力; 杜尧国; 李静敏   

  1. 吉林大学环境科学与工程系, 长春 130023
  • 收稿日期:2000-11-06 修回日期:2001-01-06 出版日期:2001-11-20 网络出版日期:2001-11-20

Structure, Surface Properties and Photocatalytic Activity of TiO2 Nanoparticles

SHANG Jing; XU Zi-Li; DU Yao-Guo; LI Jing-Min   

  1. Department of Environmental Science and Engineering; Jilin University; Changchun 130023; China
  • Received:2000-11-06 Revised:2001-01-06 Published:2001-11-20 Online:2001-11-20

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摘要： 采用金属醇盐水解法制备了ＴiＯ２纳米粒子，并用ＸＲＤ、ＳＰＳ、ＸＰＳ和ＥＳＲ等测试手段对ＴiＯ２粒子进行结构、性能测试．随焙烧温度的增加，ＴiＯ２粒子长大，晶型由锐钛矿向金红石型转变．以庚烷的气相光催化氧化为试验反应，考察不同温度处理的醇洗、水洗ＴiＯ２粒子的光催化活性．结果表明，醇洗粒子较水洗粒子显示出高的光催化活性，并且低温处理的粒子其光伏响应带边蓝移明显；阈值增加，Ｔｉ３＋含量较高，光催化活性增加．

关键词: 二氧化钛, 庚烷, 表面特性, 光催化活性

Abstract: TiO2 nanoparticles were prepared by the hydrolysis of titanium alkoxide. The properties of the particles were characterized by XRD, SPS, XPS and ESR techniques.
The particle size of the TiO2 increased as the calcining temperature increased and the structure of the TiO2 changed from anatase to rutile. The photocatalytic
oxidation of heptane was used as model reaction to measure the photocatalytic activity of TiO2 particles. The photocatalytic activity of TiO2 particles
washed with ethanol is higher than that of TiO2 particles washed with water. The lower calcining temperature induces the blue-shift of photovoltage, the
threshold higher, and the content of Ti3+ higher, which help to enhance the photocatalytic activity of TiO2 particles.

Key words: titanium dioxide, heptane, surface properties, photocatalytic activity

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