Abstract
Zr-Ce composite oxides were synthesized by the combination methods of homogeneous precipitation and sintering. Granular Zr-Ce composite oxide particles with mean diameter of 3μm, having high photocatalytic ability under the visible ray, were synthesized when the sintering temperature was 400℃. The methylene blue decomposition ability higher than TiO2 was confirmed by comparing the reactions under the fluorescent lamp and in the dark place. It may be caused by both the photocatalysis and the adsorption of Zr-Ce composite oxides. The high effectiveness was found also for the decomposition of the following organic substances; methylene blue, cooking oil, surfactant, and whey protein.
