▎ 摘　　要

NOVELTY - Preparing mesoporous tungsten trioxide/reduced graphene oxide photocatalyst, comprises adding mesoporous tungsten trioxide into graphene oxide solution, adding into cylindrical glass container, adding ethanol, magnetically stirring at 1000 revolutions per minute for 30 minutes, ultrasonicating the mixture, illuminating with mercury lamp, carrying out UV irradiation, when the color of the suspension is changed from brown to black, it is indicated that graphene oxide is reduced to reduced graphene oxide, recovering the resulting composite material by filtration, and washing with deionized water. USE - The method is useful for preparing mesoporous tungsten trioxide/reduced graphene oxide photocatalyst (claimed). ADVANTAGE - The photo-catalyst can quickly decompose water to produce oxygen, high recycling rate, high efficiency, and is environmentally friendly. DETAILED DESCRIPTION - Preparing mesoporous tungsten trioxide/reduced graphene oxide photocatalyst, comprises (i) taking 1 g KIT-6 as silicon template and dissolving in ethanol, stirring at 1000 revolutions per minute for 30 minutes, then adding 3 g phosphotungstic acid into the solution, and continuing stirring for 2 hours, evaporating the solvent to dryness at 20-30 degrees C so as to obtain white powder, calcining the resulting product at 550 degrees C for 5 hours, removing the silicon substrate by hydrogen fluoride, filtering the product, washing with deionized water and ethanol mixture 2-3 times, filtering, and drying at 110 degrees C for 1 hour to obtain mesoporous tungsten trioxide, (ii) dispersing 1 g graphite powder (of less than 30 mu m) in an 100 ml aqueous solution, where the aqueous solution contains 0.5 g sodium nitrate, 24 ml sulfuric acid and 3 g potassium permanganate, placing the reaction solution in an ice bath, vigorously stirring for 30 minutes, taking out, and continuing stirring at room temperature for 30 minutes, diluting the reaction mixture by adding 46 ml deionized water, heating to 98 degrees C and continuing stirring for 15 minutes, then adding 10 ml hydrogen peroxide and 140 ml water into the reaction system, filtering the reaction solution, washing the resulting reactant with 5% hydrogen chloride and deionized water, respectively 3-5 times, placing the product in a thermostatic electric blast oven, drying at 80 degrees C for 12 hours to obtain graphene oxide, and prior to using graphene oxide, dissolving it in deionized water to obtain 0.5 mg/ml solution, then ultrasonically peeling for 2 hours, then centrifuging at 6000 revolutions per minute for 15 minutes, and allowing the supernatant to stand; and (iii) adding mesoporous tungsten trioxide into 0.5 mg/ml graphene oxide solution in the mass ratio of 1:0.02-0.08, adding into 100 ml cylindrical glass container, adding 50 ml ethanol, magnetically stirring at 1000 revolutions per minute for 30 minutes, ultrasonicating the mixture for 30 minutes, illuminating with mercury lamp at 500 W for 8 hours, carrying out UV irradiation, when the color of the suspension is changed from brown to black, it is indicated that graphene oxide is reduced to reduced graphene oxide, recovering the resulting composite material by filtration, and washing with deionized water 3-5 times.