Study of photocatalytic activity of Cd-doped mesoporous nanocrystalline TiO2 prepared at low temperature |
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Authors: | Hong-Yuan Hao Chen-Xu He Bao-Zhu Tian Jin-Long Zhang |
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Institution: | 1. Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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Abstract: | Mesoporous nanocrystalline Cd-doped titania was firstly prepared at low temperature by a modified sol–gel method, using dodecylamine as a template. The template could be easily removed by refluxing samples in nitric acid ethanol solution. The Fourier transform infrared spectrometer (FT-IR), low-angle and wide-angle X-ray diffraction (XRD), N2 adsorption–desorption, transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and UV–visible diffuse reflectance spectroscopy were used for the characterization of catalysts. The characteristic results clearly showed that Cd2+ ions were doped into the titania lattice, and the mesoporous architecture of Cd-doped TiO2 was composed of mixed-phase crystal textures of anatase and brookite. The samples displayed high visible-light photocatalytic activity for photodegradating 2,4-dichlorophenol (2,4-DCP) solution. The high activities of samples were attributed to the bicrystalline framework, large BET surface area, small crystallite size, and Cd-doping. |
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