A Simple New Way to Prepare Cu-Doped Nano-TiO2 with Visible Light Photocatalytic Activity

Mao Lin Zhang; Long Feng Li; Xiang Dong Meng

doi:10.4028/www.scientific.net/AMR.197-198.1028

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A Simple New Way to Prepare Cu-Doped Nano-TiO₂ with Visible Light Photocatalytic Activity

Abstract:

Cu-doped TiO₂ photocatalysts were synthesized by a homogeneous hydrolysis and low temperature crystallization method using tetrabutyl titanate as the titanium source and cupric acetate as the doping agent. The phase structure, composition and morphology of the product were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS) and Brunauer-Emmett-Teller surface area analysis (BET). The XRD results confirmed that the crystalline phase of all prepared samples was anatase-type TiO₂. SEM results showed that the Cu-doped TiO₂ were composed of spherical particles with particle diameter smaller than 20 nm. Furthermore, the photocatalytic activity of the Cu-doped TiO₂ catalysts were evaluated based on the photocatalytic degradation of methyl orange (MO) in aqueous solution. The results showed that Cu-doped TiO₂ had the higher visible-light-induced catalytic activity than the commercial P25 TiO₂ powder. The copper content in Cu-doped TiO₂ had obvious effect on the visible-light-induced catalytic activity, and the degradation rate of MO could reach 33.7% using Cu-doped TiO₂ with a doping level of 1.0 mol% Cu as a photocatalyst under the visible light irradiation for 3 hours.