"IMPROVING THE ELECTROPHYSICAL PROPERTIES OF NANOCOMPOSITE MATERIALS BASED ON GRAPHENE OXIDE AND TIO2"

Abstract

"This article shows the results related to the study of the effect of graphene oxide on the photoelectric properties of nanostructured titanium dioxide films. A TiO2–GO nanocomposite material with a graphene oxide concentration of 3 wt% was synthesized by hydrothermal method. The Raman and IR spectra of nanocomposite materials have been studied and show the presence of peaks characteristic of graphene oxide and titanium dioxide. In the IR spectra, the so-called Ti-O-C bond is observed, which is responsible for fluctuations between TiO2 and graphene oxide. Studies of absorption spectra show that in a nanocomposite material, the absorption spectrum is shifted to the long-wavelength region of light. Studies of electrophysical properties were carried out using electrochemical impedance spectroscopy. The impedance spectrum of this material shows that there is an improvement when graphene oxide is added to TiO2 films. Photovoltaic parameters also show an increase in the photoinduced current in a nanocomposite material with the addition of graphene oxide by 3 wt%. It is shown that when graphene oxide is added 3 wt% to TiO2, an increase in photocatalytic properties is observed due to an increase in the photoinduced current of the nanocomposite material. "