Abstract
Flower-like anatase TiO2 films on Ti substrate were prepared via direct oxidation in H2O2 solution assisted with [Bmim]BF4 ionic liquid. The promotion effect of ionic liquid to both the growth of anatase TiO2 crystal and the formation of flower-like morphology was demonstrated. The formation process of flower-like TiO2 film was investigated via adjusting the oxidation reaction time. During the photo-degradation of aqueous rhodamine B solution under UV light (λ=365nm) in rotating disk reactor, the obtained flower-like TiO2 film exhibited efficient decomposition of rhodamine B, which could be contributed that the flower-like morphology of TiO2 film with high anatase crystallization and mesoporous structure led to the enhancement of light harvesting and reactant adsorption. Furthermore, the excellent stability of TiO2 film during the photo-degradation reaction was resulted from the stable combination of TiO2 film with Ti substrate.
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