Near-infrared light-induced photocatalysis of NaYF4:Yb, Tm@Cu2O core-shell nanocomposites

Abstract A new near-infrared-responsive photocatalyst of NaYF 4 :Yb,Tm@Cu 2 O have been successfully synthesized by a simple method. Methylene blue as a model pollutant was used to study the photocatalytic activity of NaYF 4 :Yb,Tm@Cu 2 O composites, and the energy transfer process between NaYF 4 :Yb, Tm and Cu 2 O and the origin of the degradation of pollutants were investigated. It was found that the energy transfer route between NaYF 4 :Yb, Tm and Cu 2 O is an important factor for the overall photocatalytic activity. This study suggests a promising system to apply upconversion materials for utilizing the near-infrared light to irradiate Cu 2 O-based photocatalysts.