▎ 摘　　要

NOVELTY - Preparing rare earth-doped reduced graphene oxide (rGO)/titanium oxide high-efficiency photocatalyst, comprises mixing and stirring glacial acetic acid, graphene oxide solution, rare earth salt solution and absolute ethanol, where the rare earth element is gadolinium, praseodymium, europium and/or holmium, adjusting the pH to less than or equal to 7 to obtain first solution, adding the second solution prepared from butyl titanate and absolute ethanol dropwise to the first solution, stirring and reacting at room temperature for 0.2-1 hour, stirring at 30-60 degrees C for 0.1-1 hour to obtain solution, drying solution, and heat-treating at 300-480 degrees C for 1.5-5 hours. USE - The method is useful for preparing rare earth-doped rGO/titanium oxide high-efficiency photocatalyst (claimed). ADVANTAGE - The method: has mild reaction conditions; and prepares product that has high photocatalytic efficiency, where the photocatalytic effect under visible light is excellent.