Abstract
TiO2 composite photocatalysts with doping amounts of Ce (0.5%Ce/TiO2, 1%Ce/TiO2, 2%Ce/TiO2, 3%Ce/TiO2 and 5%Ce/TiO2)were synthesized via a sol-gel method.The structure and morphology of the prepared composites were characterized by XRD, SEM, DRS, XPS. At the same time, the photocatalytic effect of the composite on rhodamine B (RhB) solution under simulated visible light irradiation was explored.The results indicated that the crystal of powder catalyst was anatase type TiO2, and the directional aggregation of Ce/TiO2 composite photocatalyst showed ice cream flowers-shaped structure.The photocatalysis activity was the best when Ce doping amounts were 3%.The degradation rate of RhB was 96% in 120 min, which was 50% higher than pure TiO2.Hydroxyl radical (⋅OH) played a leading role in the whole photodegradation reaction system, and its contribution rate was about 66.4%.
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