Visible Light Excited Catalysis and Reusability Performances of TiO₂@Pr:Y₂SiO₅ Upconversion Materials

Figure 5

Emission spectra of Pr:Y₂SiO₅ coating with different ratios of TiO₂. (a) 0%; (b) 1%; (c) 2%; (d) 3%; (e) 4%; and (f) 5%.