▎ 摘　　要

NOVELTY - A composite photocatalyst bismuth vanadate loaded with iron-doped tungstic oxide modified graphene, involves adding sodium tungstate and ferric nitrate to hydrochloric acid solution with a pH of 1.5-2, stirring and dissolving, adding isopropanol, pouring the solution into a crystallization reactor, filtering the solvent, washing the product with deionized water to neutral, and calcining in a muffle furnace to obtain a sea-urchin-shaped nano iron-doped tungstic oxide, adding bismuth nitrate, ammonium metavanadate, and graphene quantum dots to deionized water, ultrasonically dispersing, adjusting the pH to 3-4, pouring the solution into a crystallization reactor, filtering the solvent, and washing the product with deionized water to obtain flower-shaped bismuth vanadate loaded graphene, adding the nano iron-doped tungstic oxide and bismuth vanadate loaded graphene to deionized water, ultrasonically dispersing, vacuum drying, and calcining in a muffle furnace. USE - Composite photocatalyst bismuth vanadate loaded with iron-doped tungstic oxide modified graphene, is used for photolysis of water. ADVANTAGE - The composite photocatalyst effectively separates the photogenerated carrier, avoiding recombination, to generate a large amount of photo-generated electrons and holes, and reduces water to generate hydrogen and oxidizes to generate oxygen.