Study on Photocatalytic Activity of Ni2+ Doped TiO2 Thin Films

For the sake of improving the self-cleaning performance of the ceramic insulator, TiO₂ thin films and Ni²⁺ doped TiO₂ thin films were prepared by sol-gel method. The crystalline phase and morphology was studied by analyzing XRD and AFM. The film´s photocatalytic property was tested according to degradation of methyl orange solution. The results indicate that the film photocatalytic property decreases slightly when the TiO₂ thin films were doped with Ni²⁺. It is suggested that the introduction of nickel ions actually added compound spaces of photo-generated carrier in the TiO₂ thin film surface, leading to the recombination rate of electron hole pair increasing.