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Ionic liquid-templated synthesis of mesoporous CeO2–TiO2 nanoparticles and their enhanced photocatalytic activities under UV or visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
27255 44012 2011 8 PDF Available
Title
Ionic liquid-templated synthesis of mesoporous CeO2–TiO2 nanoparticles and their enhanced photocatalytic activities under UV or visible light
Abstract

Mesostructrured CeO2–TiO2 nanoparticles with different CeO2 contents have been successfully synthesized using ionic liquid (1-hexadecane-3-methylimidazolium bromide, C16MIM+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 CeO2–TiO2 materials exhibit large specific surface area and uniform pore sizes. Introduction of CeO2 species can effectively extend the spectral response from UV to visible area and enhance the surface hydroxyl groups of the mesoporous TiO2. The CeO2–TiO2 nanocomposites show high photocatalytic activity in the degradation of the p-chlorophenol aqueous solution under the UV or visible irradiation.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Well-crystallized mesoporous CeO2–TiO2 can be obtained. ► Such material exhibits strong spectral response in the visible region. ► Introduction of CeO2 species enhances the surface hydroxyl groups of the catalyst. ► The obtained material shows high photocatalytic activity under UV or visible light.

Keywords
TiO2; CeO2; Mesoporous; Ionic liquid; Photocatalysis; Visible light
First Page Preview
Ionic liquid-templated synthesis of mesoporous CeO2–TiO2 nanoparticles and their enhanced photocatalytic activities under UV or visible light
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 223, Issues 2–3, 25 September 2011, Pages 157–164
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering