Research on Photocatalytic Properties of TiO2-Graphene Composites with Different Morphologies

The TiO2-graphene (TiO2-GR) composites have been successfully synthesized through the hydrothermal reaction. Different structures of TiO2-GR composites were modified using graphene oxide (GO) and different titanium sources in hydrothermal conditions. The structure and properties of the photocatalysts have been characterized by field emission scanning electron microscope (FESEM), x-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), UV-vis diffuse reflectance spectra (DRS), and Brunauer-Emmett-Teller (BET). The results showed that due to the larger interfacial contact between TiO2 and graphene, and its greater surface area, the poriferous TiO2-GR composite exhibited the best photocatalytic properties and adsorption performance compared with the other nanocomposites.