稀土元素在光催化剂中的应用及作用机理

稀土元素具有丰富的能级,特殊的4f电子跃迁特性和光学性质,不仅能够以离子掺杂或半导体复合的形式有效提升传统TiO2光催化剂的性能,而且可以构造出多种新型的光催化剂体系.本文在归纳近年来相关文献的基础上,综述了稀土元素在光催化剂中的应用概况及研究进展,从稀土改性TiO2基光催化剂和含稀土非TiO2基新型光催化剂两方面,探讨了稀土元素在光催化剂体系中所起的作用及其机理,并对含稀土光催化剂的设计思想、研究重点、目前效果及不足之处进行了总结和评述.

Application of Rare Earth Elements in Photocatalysts and the Mechanism of Action

Possessing multiple energy levels, unique 4f electron transition ability and optical properties, rare earth elements can improve efficiently the activity of TiO2 photocatalysts by doping or preparing compound semiconductors. Furthermore, novel photocatalysts have been secured with RE elements. Based on relative documents, the application of rare earth elements in photocatalysts is reviewed in this paper, including RE modified TiO2 photocatalysts and non-TiO2 photocatalysts. The roles of RE elements and its mechanism, as well as the focus and outlook of the research of RE-containing photocatalysts were deeply discussed.