Abstract
The Pr-TiO2 photocatalyst samples were prepared by sol-gel method for improving the photocatalytic activity of TiO2. The resulting materials were analyzed by XRD, SEM, TEM, and XPS. The photocatalytic activity of the catalysts was evaluated by degradation of methyl orange under UV irradiation. It was found Pr doping retard the growth of crystalline size and the phase transformation from anatase to rutile. Praseodymium doping could bring about remarkable improvement in the photoactivity. This high activity was attributed to produce the lattice distortion and inhibit efficiently of the recombination of the electron-hole by Pr3+.
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