Synthesis of TiO2/functionalized graphene sheets (FGSs) nanocomposites in super critical CO2

Nasrin Farhangi; Yaocihuatl Medina-Gonzalez; Bo Chen; Paul A. Charpentier

doi:10.1117/12.873087

21 September 2010 Synthesis of TiO₂/functionalized graphene sheets (FGSs) nanocomposites in super critical CO₂

Nasrin Farhangi, Yaocihuatl Medina-Gonzalez, Bo Chen, Paul A. Charpentier

Proceedings Volume 7750, Photonics North 2010; 77501H (2010) https://doi.org/10.1117/12.873087
Event: Photonics North 2010, 2010, Niagara Falls, Canada

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.

Citation Download Citation

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); https://doi.org/10.1117/12.873087

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