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.