CIESC Journal

• 工业催化 • 上一篇    下一篇

基于上转换发光的可见/近红外光催化研究现状及展望

刘恩周1,樊 君1,胡晓云2,侯文倩1   

  1. 1西北大学化工学院,陕西 西安 710069;2西北大学物理学系,陕西 西安 710069
  • 出版日期:2011-12-05 发布日期:2012-03-02

Progress of visible-light and near-infrared-driven photocatalysis based on upconversion luminescence

LIU Enzhou1,FAN Jun1,HU Xiaoyun2,HOU Wenqian1   

  1. 1School of Chemical Engineering,Northwest University,Xi’an 710069,Shaanxi,China;2Department of Physics,Northwest University,Xi’an 710069,Shaanxi,China
  • Online:2011-12-05 Published:2012-03-02

摘要:

上转换发光材料可将低能光子转换为高能光子,对于太阳能的转化利用具有潜在的应用前景。本文以TiO2为例,介绍了上转换发光在可见/近红外光催化领域的研究背景,说明了光能吸收、光能转换、光能转移、表面反应的光能利用机制,总结了上转换发光的研究进展。同时重点分析了稀土上转换发光在可见/近红外光催化领域的研究现状,阐述了上转换发光与其它改性方法协同提高TiO2光催化效率的基本原理。最后提出了基于复合上转换发光的光催化研究思路,展望了上转换发光在光催化中的应用前景。

Abstract:

Up-converting phosphorsUCPscan effectively convert longer wavelength radiation into shorter wavelength fluorescence and exhibit application potential in improving the light energy utilizationespecially the sunlight with a longer wavelength. In this paper the research background of the photocatalysis based on UCPs is introduced with TiO2 as an examplethe advances of research on UCPs are summarizedand the mechanism of light energy utilization is presentedincluding light absorptionlight conversionlight transferand surface reaction. Meanwhilethe visible-light and near-infrared-driven photocatalysis based on rare-earth UCPs are analyzed in detailand the mechanism for improving TiO2 catalytic activity using UCPs and other methods are explained. Additionallya research approach to improve TiO2 photocatalytic efficiency by UCPs composite of is presentedand the application perspective of photocatalysis based on upconversion luminescence is discussed as well.