Synthesis of TiO2/RGO Nanocomposites by Hydrothermal Method and their Photocatalytic Activity Research
The TiO2 reduced graphene oxide (TiO2/RGO) nanocomposites were synthetized by hydrothermal method. The microstructure and morphologies of them were characterized by XRD and SEM. The photocatalytic activity was investigated by the methyl orange photogradation under UV illumination. The results showed that GO sheets had wrinkles and folds, and anatase-structured TiO2 covered on graphene surface after hydrothermal reaction. Compared to the TiO2 nanoparticles, the TiO2/RGO nanocomposites display the higher photogradation efficiency. In 90 minutes, the gradation percentage of TiO2/RGO nanocomposites to methyl orange is 80%, higher than TiO2 nanoparticle (40%). This is attributed to the large surface area of TiO2/RGO nanocomposites and their improved separation efficiency of electron-hole pair.