Optical Investigation of TiO2/Graphene Oxide Thinfilm Prepared by Spin Coating Technique

Abstract

Titanium dioxide/graphene oxide thin films with different concentrations of (0.0, 0.015, 0.030, 0.045 and 4.5 g/ml) graphene oxide were deposited on glass substrates at room temperature using spin coating method. Thin films were characterized by UV-Vis, FTIR and Raman spectroscopy. Presence of graphene oxide was confirmed with FTIR and Raman spectroscopy, too. The optical band gap of TiO2 with the addition of graphene oxide layer initially decreases, but by increasing the concentration of graphene oxide, the optical band gap increases to 2.9eV.