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Issue 37, 2013
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Influence of graphene synthesizing techniques on the photocatalytic performance of graphene–TiO2 nanocomposites

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Abstract

Model photocatalysts composed of TiO2graphene nanocomposites are prepared to address the effect of graphene quality on their photocatalytic performance. Graphene is synthesized by catalyst-assisted chemical vapor deposition (CVD), catalyst-free CVD and solution processing methods. TiO2 is prepared by reactive magnetron sputtering and subsequent annealing. Fabricated model photocatalysts have different morphology and physical properties, as revealed using spectrophotometry, atomic force microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, photoluminescence, and four-probe electrical measurements. All graphene-containing composites have significantly higher photocatalytic activity compared to bare TiO2 films in the gas phase methanol photooxidation tests. Their activity is proportional to the electrical conductivity and surface roughness of the respective carbon structure, which in turn depends on the preparation methods. The mechanisms of enhancement are further assessed by comparison with the performance of reference TiO2–graphitic-carbon and TiO2–Au thin films.

Graphical abstract: Influence of graphene synthesizing techniques on the photocatalytic performance of graphene–TiO2 nanocomposites

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Publication details

The article was received on 13 Jun 2013, accepted on 21 Jul 2013 and first published on 23 Jul 2013


Article type: Paper
DOI: 10.1039/C3CP52457D
Phys. Chem. Chem. Phys., 2013,15, 15528-15537
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    Influence of graphene synthesizing techniques on the photocatalytic performance of graphene–TiO2 nanocomposites

    R. Sellappan, J. Sun, A. Galeckas, N. Lindvall, A. Yurgens, A. Yu. Kuznetsov and D. Chakarov, Phys. Chem. Chem. Phys., 2013, 15, 15528
    DOI: 10.1039/C3CP52457D

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