▎ 摘　　要

NOVELTY - Preparing nanocomposite material with high photocatalytic efficiency involves using improved Hummers method to prepare graphene oxide, first pre-oxidizing the graphite, using concentrated sulfuric acid and potassium permanganate as oxidants to react with the pre-oxidized graphite to obtain graphene oxide, adding graphene oxide and titanium oxide to deionized water and absolute ethanol respectively, and vibrating ultrasonically at low temperature for 30-50 minutes to obtain a dispersion of graphene oxide and titanium oxide, mixing the two solutions, adjusting the pH of the solution with ammonia if the value is between 9-10, continue ultrasonic treatment for 40-60 minutes, and then hydrothermally reacting the mixed solution at 210 degrees C for 8-12 hours. USE - Method for preparing nanocomposite material with high photocatalytic efficiency. ADVANTAGE - The method has stable chemical property, high photocatalytic, no toxicity, great application potential in the sewage treatment field, realistic meaning. DETAILED DESCRIPTION - Preparing nanocomposite material with high photocatalytic efficiency involves using improved Hummers method to prepare graphene oxide, first pre-oxidizing the graphite, using concentrated sulfuric acid and potassium permanganate as oxidants to react with the pre-oxidized graphite to obtain graphene oxide, adding graphene oxide and titanium oxide to deionized water and absolute ethanol respectively, and vibrating ultrasonically at low temperature for 30-50 minutes to obtain a dispersion of graphene oxide and titanium oxide, mixing the two solutions, adjusting the pH of the solution with ammonia if the value is between 9-10, continue ultrasonic treatment for 40-60 minutes, and then hydrothermally reacting the mixed solution at 210 degrees C for 8-12 hours, natural cooling to obtain black hydrogel, washing with deionized water for 3-5 times, and drying to obtain graphene-titanium dioxide nano composite material. The urea and ammonium metavanadate are used as the nitrogen source and vanadium source respectively and added to the reactant to obtain product.