▎ 摘　　要

NOVELTY - Preparing graphene oxide films and titanium dioxide rod heterojunction material comprises e.g. adding concentrated sulfuric acid, graphite powder and sodium nitrate into a beaker, adding milled potassium permanganate solid powder, deionized water slowly, adding deionized water and 30% hydrogen peroxide solution, washing with hydrochloric acid solution, dissolving in deionized water, transferring into clean surface dish, adding solid graphene oxide into mixed solution of deionized water and ethanol, adding titanium dioxide nanorods, transferring to a polytetrafluoroethylene reactor. USE - The method is useful for preparing graphene oxide film and titanium dioxide rod heterojunction material (claimed). ADVANTAGE - The method has simple preparation processes; and has excellent photocatalytic properties. DETAILED DESCRIPTION - Preparing graphene oxide films and titanium dioxide rod heterojunction material comprises (i) adding concentrated sulfuric acid, graphite powder and sodium nitrate into a beaker, placing the beaker in an ice water bath, magnetically stirring the reaction for 0.5-2 hours to obtain a mixed liquid, (ii) adding milled potassium permanganate solid powder into mixed liquid obtain in step (i), and stirring for 1-6 hours in an ice-water bath, (iii) heating at 30-40 degrees C, and continued stirring for 0.5-2 hours, adding 30-50 ml deionized water slowly, transferring the beaker to an oil bath at 100 degrees C for 5-30 minutes, (iv) cooling to room temperature, adding 50-100 ml deionized water and 10-20 ml 30% hydrogen peroxide solution, and filtrating, (v) washing with 300-500 ml hydrochloric acid solution, dissolving the product in deionized water, centrifuging to supernatant to neutral pH value, and carrying out dialysis treatment, (vi) transferring dialyzed sample to a clean surface dish, vacuum drying at 30-80 degrees C, grinding into powder using agate pestle to obtain solid graphene oxide, (vii) adding solid graphene oxide into mixed solution of 5-20 ml deionized water and 5-10 ml ethanol, and then carrying out ultrasound for 0.5-1.5 hours, (viii) adding titanium dioxide nanorods above mixed solution, ultrasonic or stirring for 2-4 hours to obtain a mixed solutions, (ix) transferring the solution formed in step (viii) to a polytetrafluoroethylene reactor, reacting at 100-140 degrees C for 2-5 hours, and (x) cooling to room temperature, filtrating, washing, and vacuum drying at 40-80 degrees C to obtain final product.