Effect of Li(I) and TiO₂ on the Upconversion Luminance of Pr:Y₂SiO₅ and Its Photodegradation on Nitrobenzene Wastewater

Figure 5

Emission spectra of Li,Pr:Y₂SiO₅ with different concentrations of TiO₂. (a) 0%; (b) 0.3%; (c) 0.5%; (d) 1.0%; (e) 2.0%.