Catalytic activity of CeO2@TiO2 for environmental protection†
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Abstract
CeO2@TiO2 core–shell nanostructures are synthesized at various titania contents by the sol–gel method. Such supports have been evaluated in the CO oxidation reaction to study lattice oxygen mobility. Also, FexOy/CeO2@TiO2 synthesized by the impregnation method to study the catalytic activities of the degradation of methylene blue and carmoisine dyes in Fenton-like processes. CeO2@TiO2 catalysts with a higher proportion of rutile have better activity in CO oxidation. The oxidation of dyes proceeds most efficiently on Fe-composites with titania containing a higher proportion of metastable phases of titania (anatase + brookite), in contrast to CO oxidation catalysts. The catalytic behavior of the materials was discussed to determine the role of the core–shell structure, ceria–titania interaction, and other particular qualities. The proposed systems can be promising catalysts for environmental protection.
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