Preparation and doping modification of cerium oxide photosensitizers applied to photosensitive glass ceramics

CeO 2 nanoparticles doped with different types of Pr, Y, W and CaF 2 are prepared via a facile one-pot combustion method. Their crystallinity, particle size and absorption spectrum are investigated by X-ray diffraction (XRD), grading analysis and ultraviolet–visible spectroscopy (UV–Vis) absorption spectrum. Among the doped samples, W-doped CeO 2 (Ce 0.9 W 0.1 O 2 ) is selected out, which exhibits obvious red-shift of the absorption band as compared with the undoped CeO 2 , achieving good match between the ceria absorption peak and the industrial 365 nm light source. Consequently, under the 365 nm exposure, the W-doped CeO 2 show more efficient reduction ability for Ag + to Ag. The results indicate that W-doped CeO 2 is a very promising photosensitizer for photosensitive glass ceramics under industrial 365 nm light exposure, which can better absorb photons under UV light and then reduce Ag + to elemental Ag.