▎ 摘　　要

NOVELTY - Preparation of 3-D graphene bismuth vanadate composite photocatalyst comprises dissolving 2-D graphene and ascorbic acid into de-ionized water, placing into ultrasonic cleaning machine and magnetically stirring to obtain mixed liquid, reacting obtained mixed liquid into water bath, washing with water, freezing and drying obtained reaction liquid to obtain 3-D graphene; and dissolving bismuth nitrate pentahydrate into de-ionized water, adding 3-D graphene, subjecting into sonication, stirring, adding ammonium metavanadate, magnetically stirring, adding urea, reacting under oil bath, centrifuging, washing and drying. USE - Method for preparing 3-D graphene bismuth vanadate composite photocatalyst used for degrading tetracycline in large scale (claimed). ADVANTAGE - The method has larger specific surface area, more reaction sites and tetracycline that can exhibit excellent photocatalysis performance.