▎ 摘　　要

The TiO2/reduced graphene oxide (RGO)-Al(2)O(3)composites were synthesized by dispersing TiO(2)on RGO-modified Al(2)O(3)by impregnation method. The surface properties of TiO2/RGO-Al(2)O(3)were systematically studied. It was found that the TiO(2)particle size was about 15 nm, and the particles were relatively uniform in the loading range of 20-40 wt% compared with that of Al2O3. The surface area increased obviously as RGO was added to Al2O3. The chemical structures of the TiO2/RGO-Al(2)O(3)composites were characterized by diffuse reflectance UV-Visible spectroscopy and X-ray photoelectron spectroscopy. Results revealed the presence of an intense interaction between TiO(2)and RGO-Al2O3. The dark adsorption results showed that the TiO2/RGO-Al(2)O(3)had a higher adsorption ability for methyl orange (MO), which was mainly due to the pi-pi conjugation between MO and RGO. The liquid-phase photocatalytic oxidation of MO was adopted to evaluate the efficiency of the obtained materials. TiO2/RGO-Al(2)O(3)showed higher catalytic efficiency over the TiO2/Al(2)O(3)or the commercial P25 photocatalyst. Recycling tests showed excellent stability of TiO2/RGO-Al2O3. The TiO2/RGO-Al(2)O(3)was easier to separate by filtration method than TiO(2)due to its high anti-hydration dispersion ability. The studies indicated their good prospects for large-scale application.