▎ 摘　　要

NOVELTY - Preparing bismuth vanadium and nitrogen doped graphene quantum dot complex visible photocatalyst comprises adding nitrogen-doped graphene quantum dots to bismuth vanadate, where the mass ratio of bismuth vanadate and nitrogen-doped graphene quantum dots is 1:0.025-0.1, fully stirring uniformly, vacuum drying overnight, grinding the sufficiently dried sample, placing in a tubular furnace and continuously passing argon at 170-190 degrees C for 1-2 hours. USE - The catalyst is useful for photocatalytic degradation of organic dye methylene blue (claimed) and environmental organic pollutants. ADVANTAGE - The catalyst can adsorb the organic dye; while promotes the separation of photogenerated carriers; improves visible light catalytic performance; and improves the degradation of methylene blue performance.