▎ 摘　　要

In this study, TiO2 nanotubes/reduced graphene oxide (TiO2/rGO) binary nanocomposites were synthesized by electrospinning and hydrothermal reaction in mixed solution of ethanol and deionized water. The microstructures and morphologies of TiO2 nanotubes, graphite oxide (GO) and TiO2/rGO nanocomposites were investigated via Transmission electron microscopy, Scanning electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy and UV-Visual spectrophotometer (UV-Vis), the specific surface areas and pores distribution of samples were measured through N-2 adsorption-desorption. The results showed that the TiO2 nanotubes were well combined with rGO sheets and there were Ti-C bonds and Ti-O-C bonds in nanocomposites. The absorption edge of TiO2/rGO nanocomposites shifted to higher wavelengths and improved utilization rate in visible region compared to pure TiO2 nanotubes. The photocatalytic activities of all samples were investigated through photodegradation of Rhodamine B (RhB) dye under Xenon lamp irradiation and the test results showed that the photocatalytic activities of TiO2/rGO nanocomposites were obviously enhanced. When the mass of rGO ratio was increased to 10%, TiO2/rGO nanocomposites showed the highest photocatalytic activities.