The Preparation, Characterization and Photocatalytic Activity of Mixed P25/CeO 2 Nanocomposites

This study uses the wet chemical method to synthesize P25 (TiO 2 )/CeO 2 composites by mixing P25 and Ce(NO 3 ) 3 ·6H 2 O at different volumetric concentrations. X-ray diffraction, transmission electron microscopy and ultraviolet–visible diffuse reflectance spectroscopy are used to analyze the structure, morphology, optical properties and photocatalytic activity of the TiO 2 /CeO 2 composites with different compositions. The pollutant, methylene blue solution, was used for analysis. The results show that the photocatalytic activity of the composite catalysts is greater than that of pure TiO 2 or pure CeO 2 . The catalyst, TiO 2 55%/CeO 2 (v/v), exhibits the greatest level of photocatalytic activity.