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Issue 8, 2013
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2D and 3D characterization of a surfactant-synthesized TiO2–SiO2 mesoporous photocatalyst obtained at ambient temperature

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Abstract

A mesoporous TiO2–SiO2 nanocomposite photocatalyst has been prepared from TiO2 nanoparticles and ethoxysilane oligomers in the presence of a non-ionic surfactant (n-octylamine). The 2D and 3D structure properties of the resulting nanomaterial are described. The use of 3D techniques, particularly HAADF-STEM electron tomography, together with 3D reconstructions and atomic force microscopy, provides insight into the fine structure of these materials. We find that n-octylamine creates a mesoporous silica structure in which titania nanoparticles are embedded, and that some of the titania is retained on the outer surface of the material. Rapid photodegradation of methylene blue dye is facilitated, due to the synergistic effect of: (1) its adsorption into the composite mesoporous structure, and (2) its photodegradation by the superficial TiO2.

Graphical abstract: 2D and 3D characterization of a surfactant-synthesized TiO2–SiO2 mesoporous photocatalyst obtained at ambient temperature

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Publication details

The article was received on 29 Jul 2012, accepted on 16 Dec 2012 and first published on 17 Dec 2012


Article type: Paper
DOI: 10.1039/C2CP42606D
Citation: Phys. Chem. Chem. Phys., 2013,15, 2800-2808
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    2D and 3D characterization of a surfactant-synthesized TiO2–SiO2 mesoporous photocatalyst obtained at ambient temperature

    L. Pinho, J. C. Hernández-Garrido, J. J. Calvino and M. J. Mosquera, Phys. Chem. Chem. Phys., 2013, 15, 2800
    DOI: 10.1039/C2CP42606D

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