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21 September 2010 Synthesis of TiO2/functionalized graphene sheets (FGSs) nanocomposites in super critical CO2
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Proceedings Volume 7750, Photonics North 2010; 77501H (2010)
Event: Photonics North 2010, 2010, Niagara Falls, Canada
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.
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Nasrin Farhangi, Yaocihuatl Medina-Gonzalez, Bo Chen, and Paul A. Charpentier "Synthesis of TiO2/functionalized graphene sheets (FGSs) nanocomposites in super critical CO2", Proc. SPIE 7750, Photonics North 2010, 77501H (21 September 2010);

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