Hydrothermal Preparation and Photocatalytic Performance of (I₂)_n Sensitized and I(V) Doped TiO₂ Supported on SiO₂

Author： Deng Peichang Wang Haizeng Sun Baowei Fan Lixia Li Ling

Publisher： Science and Technology Network Inc.

ISSN： 1203-8407

Source： Journal of Advanced Oxidation Technologies, Vol.12, Iss.2, 2009-07, pp. : 226-230

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Abstract

A mild hydrothermal route for preparing highly photocatalytic activity (I₂)_n sensitized and I(V) doped TiO₂ supported on SiO₂ (ITS) materials was developed. The ITS was characterized by X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area, TG-DTA, X-ray diffraction, UV–vis diffuse reflectance spectra and transmission electron microscopy. Concentration of TiO₂ in the ITS was 287.8 mg/g. The presence of iodine and hydrogen iodate in the ITS was established through the results of XRD and XPS. ITS is very stable under 750 K and shows a drastic photoabsorption in the range of wavelength from 384 to 700 nm for the iodine sensitization. The photocatalytic activity was evaluated by the photocatalytic oxidation of phenol under dysprosium lamp light illumination. ITS exhibited highly photocatalytic activity.