科研之友
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摘要
Metallic platinum and indium oxide codoped titania nanotubes were fabricated by a multicomponent assembly combined with a solvothermal treatment. The structure, morphology, and optical properties of the prepared samples were comparatively characterized. The Pt/In2O3-TiO2 nanotubes exhibited an anatase phase with homogeneously dispersed metallic Pt nanoparticles on the surface. Under the simulated sunlight irradiation, the photocatalytic performance of the samples was tested in the degradation of the dyes rhodamine B (RB) and diethyl phthalate (DEP). Compared to In2O3-TiO2 and TiO2 nanotubes as well as Pt/In2O3-TiO2 nanoparticles, Pt/In2O3-TiO2 nanotubes with 0.8% Pt and 9.4% In2O3 doping exhibited higher photocatalytic activity, and nearly total degradation of the dyes RB (20 mg L-1) or DEP (10 mg L-1) was obtained after 50 or 45 min under simulated light irradiation. The reasons for the enhanced photocatalytic activity were revealed.
