Abstract:

Up-converting phosphors（UCPs）can effectively convert longer wavelength radiation into shorter wavelength fluorescence and exhibit application potential in improving the light energy utilization，especially the sunlight with a longer wavelength. In this paper， the research background of the photocatalysis based on UCPs is introduced with TiO₂ as an example，the advances of research on UCPs are summarized，and the mechanism of light energy utilization is presented，including light absorption，light conversion，light transfer，and surface reaction. Meanwhile，the visible-light and near-infrared-driven photocatalysis based on rare-earth UCPs are analyzed in detail，and the mechanism for improving TiO₂ catalytic activity using UCPs and other methods are explained. Additionally，a research approach to improve TiO₂ photocatalytic efficiency by UCPs composite of is presented，and the application perspective of photocatalysis based on upconversion luminescence is discussed as well.

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。