Investigation of the Characteristics of the Prepared TiO2/Graphene Films by Spin Coating Method

Document Type : Research Paper


1 Nanomaterials Laboratory, Department of Physics, College of Science, University of Thi-Qar, Thi-Qar,64001, Iraq

2 Department of Physics, College of Science, Al Muthanna University,samawa, Iraq


Titanium dioxide/Graphene composite films were prepared utilizing two steps (Hydrothermal and spin coating) methods FTO glass substrates for (1, 2, 3, and 4) layers, with sequential thermal treatment. The produced films were characterized using X-ray diffraction, where the dominant phase was (011) with a crystalline size of 38.6 nm for (1, 2, and 3) layers. While for 4 layers was (004) with 36.92 nm. In general, the increasing of layers and the heating treatments affected the crystalline size of that deposited on FTO glass, where swing between the two values (27 and 36) nm, without the appearance of any peaks of graphene. In addition, the morphological properties were determined by transmission electron microscopy. The scanning electron microscopy images of the prepared films showed the dependence of both partial size and porosity on the number of layers. Despite reducing the gap energy of the 1layer film compared to TiO2 gap energy. However, the energy gap of the (2, 3, and 4) layer films increased to about 3 eV, where the increase in layers number over one layer and the thermal treatment did not affect a noticeable change in the gap energy.