Abstract
Mesostructrured CeO 2–TiO 2 nanoparticles with different CeO 2 contents have been successfully synthesized using ionic liquid (1-hexadecane-3-methylimidazolium bromide, C 16MIM +Br −) as a template by a hydrothermal method. The prepared materials were characterized by means of X-ray diffraction (XRD), nitrogen adsorption–desorption, transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra analysis. The obtained CeO 2–TiO 2 materials exhibit large specific surface area and uniform pore sizes. Introduction of CeO 2 species can effectively extend the spectral response from UV to visible area and enhance the surface hydroxyl groups of the mesoporous TiO 2. The CeO 2–TiO 2 nanocomposites show high photocatalytic activity in the degradation of the p-chlorophenol aqueous solution under the UV or visible irradiation.
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