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Proceedings Paper

Synthesis of TiO2/functionalized graphene sheets (FGSs) nanocomposites in super critical CO2
Author(s): Nasrin Farhangi; Yaocihuatl Medina-Gonzalez; Bo Chen; Paul A. Charpentier
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Paper Abstract

Highly ordered TiO2 nanowire arrays were prepared on the surface of Functionalized Graphene sheets (FGSs) by solgel method using titanium isopropoxide monomer with acetic acid as the polycondensation agent in the green solvent, supercritical carbon dioxide (sc-CO2). Morphology of synthesized materials was studied by SEM and TEM. Optical properties of the nanocomposites studied by UV spectroscopy which showed high absorption in visible area as well as reduction in their band gap compared to TiO2. By high resolution XPS, chelating bidentate structure of TiO2 with carboxylic group on the surface of graphene sheets can be confirmed. Improvement in the optical properties of the synthesized composites compared to TiO2 alone was confirmed by photocurrent measurements.

Paper Details

Date Published: 21 September 2010
PDF: 9 pages
Proc. SPIE 7750, Photonics North 2010, 77501H (21 September 2010); doi: 10.1117/12.873087
Show Author Affiliations
Nasrin Farhangi, The Univ. of Western Ontario (Canada)
Yaocihuatl Medina-Gonzalez, The Univ. of Western Ontario (Canada)
Bo Chen, The Univ. of Western Ontario (Canada)
Paul A. Charpentier, The Univ. of Western Ontario (Canada)

Published in SPIE Proceedings Vol. 7750:
Photonics North 2010
Henry P. Schriemer; Rafael N. Kleiman, Editor(s)

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