二氧化钛掺杂改性的研究进展

Progress on Doping Tactics of Titanium Dioxide

二氧化钛作为一种具有光催化活性的氧化物半导体材料,在利用太阳能降解环境污染物的领域具有广阔的应用前景。但是,由于二氧化钛存在光量子产率低,禁带宽度较大,光催化反应活性较低等缺点,严重阻碍了其在实际应用中的发展。目前,为改善二氧化钛的光催化性能,多种化学物质被用于二氧化钛的掺杂研究,包括过渡金属、贵金属、非金属和稀土元素等,不论是对二氧化钛进行单独掺杂或共掺杂都已被广泛地研究,结果表明,适当的掺杂将显著提高二氧化钛的光催化活性。本文对该领域的研究现状进行了综述,在此基础上对二氧化钛掺杂改性研究的发展进行了展望。

Titanium dioxide as an oxide semiconductor with photocatalytic activity has wide applications in both solar energy and photodegradation of environmental pollutants. However, because of low quantum yields, wide band gap, and limited reaction rate, the practical application of titanium dioxide is hindered. To overcome these drawbacks of titanium dioxide, plenty of elements including transition metal, noble metal, nonmetallic element and rare earth element have been investigated for the doping modification of titanium dioxide. All results indicate that the photocatalytic activity of titanium dioxide could be improved obviously with an appropriate doping. Recent progress of doping modification of titanium dioxide is reviewed in this paper. Shortcomings of existing doping methods and development direction of improvement of titanium dioxide are discussed as well.