▎ 摘　　要

NOVELTY - Preparation of composite photocatalyst graphene oxide/bismuth vanadate (BiVO4) comprises preparation of precursor solution by putting pre-oxidized graphene into distilled water, ultrasonically dispersing uniformly to obtain graphene oxide suspension, dissolving bismuth nitrate and ammonium metavanadate respectively in nitric acid and ammonia water to obtain A and B solutions, under ultrasonic state, adding the A and B solutions into graphene oxide suspension, dispersing uniformly, and magnetically stirring to obtain the precursor solution; hydrothermal preparing composite particles by putting the precursor solution into reaction kettle with PTFE lining, keeping the temperature for 24 hours at 110 degrees C, cooling to 60 degrees C, opening the kettle and obtaining the reaction liquid; and washing and grinding by collecting precipitate solid phase material at the lower layer of the reaction liquid, using distilled water to centrifugally wash the solid phase material, and drying and grinding. USE - The method is for preparation of composite photocatalyst graphene oxide/BiVO4. ADVANTAGE - The method solves the problem of low efficiency photocatalytic material, is simple, and provides composite photocatalytic nanoparticle with improved photocatalytic property. DETAILED DESCRIPTION - Preparation of composite photocatalyst graphene oxide/BiVO4 comprises preparation of precursor solution by putting pre-oxidized graphene into distilled water, ultrasonically dispersing uniformly to obtain graphene oxide suspension, dissolving bismuth nitrate and ammonium metavanadate respectively in nitric acid and ammonia water to obtain A and B solutions, under ultrasonic state, adding the A and B solutions into graphene oxide suspension, dispersing uniformly, and magnetically stirring to obtain the precursor solution; hydrothermal preparing composite particles by putting the precursor solution into reaction kettle with PTFE lining, keeping the temperature for 24 hours at 110 degrees C, cooling to 60 degrees C, opening the kettle and obtaining the reaction liquid; and washing and grinding by collecting precipitate solid phase material at the lower layer of the reaction liquid, using distilled water to centrifugally wash the solid phase material for multiple times, and drying and grinding into powder to obtain graphene oxide/BiVO4 composite photocatalyst, where the mass ratio of pre-oxidized graphene and bismuth vanadate synthesized by the solution A and the solution B in the first step is 1:1. An INDEPENDENT CLAIM is included for graphene oxide/BiVO4 composite photocatalyst having particle diameter of 6-10 mu m.