Near-infrared photocatalyst of Er3+/Yb3+ codoped (CaF2@TiO2) nanoparticles with active-core/active-shell structure

Abstract

A novel near-infrared (NIR) photocatalyst of Er3+/Yb3+-(CaF2@TiO2) was synthesized with optically active centers (Er3+/Yb3+) presented both in the CaF2 cores and TiO2 shells, and the corresponding upconversion luminescence properties increased greatly, which was helpful for the organic dye solution removal efficiency under NIR irradiation.