Preparation and Characterization of N, S, F—Codoped Nanosize TiO2 with Ionic Liquid
SUN Da-gui1, DU Jun1, LIU Zuo-hua1, TAO Chang-yuan1, ZHAI Jun2
1. College of Chemistry & Chemical Engineering, Chongqing University, Chongqing 400030, China 2. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education,Chongqing University, Chongqing 400045，China
Abstract：N, S, F—co-doped TiO2 visible-light response photocatalyst(N—S—F—TiO2) was prepared with TiCl4, thiourea and ionic liquid ([C6mim]+-) via the microwave-catalytic hydrolysis precipitation process followed by calcination in an NH3/N2 atmosphere. It was characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and ultraviolet-visible diffusion reflectance spectroscopy(UV-Vis/DRS). Results showed that it was high purity anatase. The Ti—O—N, Ti—O—S and Ti—S bonds were formed in the TiO2 crystal and F used to dope TiO2 in the form of TiOF2. In the visible region 400~550 nm, it has strong absorption, and in 600~800 nm there was a strong absorption band. N—S—F—TiO2 prepared at volume ratio of [C6mim]+-/H2O of 5/95 exhibited the highest photocatalytic activity, and the degradation ratio of methyl orange was 95% under visible-light irradiation for 200 min. Multi-element co-doped synergistic effect was demonstrated by enhancement of the absorption in the visible region and higher visible light photocatalytic activity for N—S—F—TiO2.
孙大贵1，杜 军1，刘作华1，陶长元1，翟 俊2 . 离子液体辅助N, S, F共掺杂纳米TiO2的制备与表征 [J]. 光谱学与光谱分析, 2011, 31(02): 525-529.
SUN Da-gui1, DU Jun1, LIU Zuo-hua1, TAO Chang-yuan1, ZHAI Jun2 . Preparation and Characterization of N, S, F—Codoped Nanosize TiO2 with Ionic Liquid . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(02): 525-529.
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