▎ 摘　　要

NOVELTY - Preparing iron oxide-graphene-titanium dioxide composite visible light photocatalytic material (I), comprises dispersing pre-oxidized graphite in concentrated sulfuric acid and then cooling, adding potassium permanganate to obtained solution, drying to obtain graphene oxide, dissolving the graphene oxide in ethanol, adding iron (iii) chloride hexahydrate and sodium acetate to obtained product, centrifuging and washing black precipitate, dispersing obtained iron oxide-graphene into water, adding titanium dioxide to the product, washing, and freezing and drying obtained product. USE - The method is useful for preparing (I) (claimed). ADVANTAGE - (I) can be prepared with high-photo-catalytic efficiency and good stability in a simple and easy manner. DETAILED DESCRIPTION - Preparing iron oxide-graphene-titanium dioxide composite visible light photocatalytic material (I), comprises dispersing pre-oxidized graphite in concentrated sulfuric acid and then cooling for 1-2 hours to prepare uniform suspension (44.4 g/l), adding potassium permanganate to the solution for 3 times, placing the solution in an ice bath at a temperature of less than 10 degrees C and then stirring for 2 hours, reacting the solution at 30-40 degrees C for 4-5 hours, slowly adding concentrated sulfuric acid to agitate the solution for 2 times and 30-60 minutes, adding 30% of hydrogen peroxide for 6 times to remove excess of potassium permanganate, stirring at room temperature for 30-60 minutes until the color of solution appears bright yellow, standing for 20-28 hours, washing obtained product using 10-15% of hydrochloric acid and water for 3-5 times, drying by a freezing dryer to obtain graphene oxide, dissolving the graphene oxide in ethanol for 30-60 minutes after ultrasounding for 3-5 hours, adding iron(III) chloride hexahydrate and sodium acetate with mole ratio of 1:2 into a reaction kettle at 180-200 degrees C for 8-12h to obtain black precipitate, and then centrifuging, washing obtained product using ethanol for 3-5 times, freezing and drying to obtain iron oxide-graphene, where mass ratio of the graphene oxide and the iron oxide-graphene is 1:2-2:1, dispersing iron oxide-graphene into water to prepare uniform suspension (0.05 g/l), adding titanium dioxide to obtained product and then stirring for 2-3 hours to obtain uniform solution, placing the solution into the reaction kettle at 120-160 degrees C for 3-5 hours, washing precipitate by water for 3-5 times, and freezing and drying obtained product, where mass ratio of iron oxide-graphene to titanium dioxide is 1:50-1:100.