▎ 摘　　要

NOVELTY - Preparation of titanium dioxide-reduced graphene oxide (TiO2-rGO) composite photocatalyst comprises treating Aeroxide P25 (RTM: TiO2) at 100-750 degrees C for 0.5-5 hours; ultrasonically dispersing GO in deionized water to form GO solution; dispersing heat-treated TiO2 nanoparticles in homogenous solution of rhodamine B and GO, and uniformly stirring to obtain uniform suspension; and irradiating the suspension with visible light under nitrogen protection for 10-300 minutes, washing resulting product three times with deionized water, and vacuum drying at 30-120 degrees C for 1-12 hours. USE - Method for preparing TiO2-rGO composite photocatalyst (claimed). ADVANTAGE - The method is environment-friendly, simple and suitable for industrial production; does not use organic additive as reducing agent; and has low device requirement. The obtained catalyst has high photocatalytic activity. DETAILED DESCRIPTION - Preparation of TiO2-rGO composite photocatalyst comprises treating Aeroxide P25 (RTM: TiO2) at 100-750 degrees C for 0.5-5 hours to obtain heat-treated TiO2 nanoparticles; ultrasonically dispersing GO in deionized water to form 0.001-2 wt.% GO homogeneous solution; uniformly mixing 2.5 ml rhodamine B solution and 10 ml GO solution; dispersing 1 g TiO2 nanoparticles in homogenous solution of rhodamine B and GO, and uniformly stirring to obtain uniform suspension; and irradiating the suspension with visible light under nitrogen protection for 10-300 minutes, washing resulting product three times with deionized water, and vacuum drying at 30-120 degrees C for 1-12 hours. The concentration of rhodamine B solution is 1-50 mg/L.