Expoloriting of graphene oxide for improving physical properties of TiO2(NPs): toward photovoltaic devices and wastewater remediation approaches
, 4616, king Fahd, Makkah, Saudi Arabia
2 Department of Physics, Faculty of Applied Science, Umm Al-Qura University, 21955, Makkah, Saudi Arabia
3 Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, 21955, Makkah, Saudi Arabia
4 Department of Physics, Science Faculty, Taiba University, Madinah, Saudi Arabia
5 Chemistry Departement, Faculty of Science, Assiut University, 71516, Assiut, Egypt
Accepted: 16 September 2022
Published online: 20 October 2022
This work reports the impact of graphene oxide (GO) on titanium dioxide (TiO2)-based thin films. The obtained data represent a methodical investigation on the physical and dielectric characteristics of TiO2 nanoparticles (NPs) in solution mixed with different volumes of graphene oxide (0, 2, 4, 6 ml) and deposited on a glass substrate by spin coating. Our obtained nanocomposites films were characterized by FTIR, SEM, EDX, XRD, UV–Vis, thermogravimetric analysis and impedance spectroscopy (IS) techniques. The presence and disappearance of functional groups were confirmed by FTIR spectroscopy. SEM images displayed agglomerative surface and a remarkable correspondence between added content, the surface roughness and porosity of the films. The band gap energy of our GO–TiO2 nanocomposites decreased in the range of 3.2–2.2 eV. The impedance spectroscopy analysis revealed a semiconducting behavior of layers after annealing until 150 °C. The photocatalytic activities of GO–TiO2 nanocomposite were esteemed by degradation of methyl orange (MO) under UV-irradiation. Our results open up the opportunity for using the GO–TiO2 nanocomposite thin films as promising candidate in solar cells or photovoltaic applications.
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