▎ 摘　　要

NOVELTY - A graphene-based bismuth tungstate composite photocatalyst comprises bismuth tungstate photocatalyst, graphene oxide, hydrazine hydrate and deionized water in mass ratio of 100-4000 mg:10 mg:0.2 mL:33-100 mL. USE - Graphene-based bismuth tungstate composite photocatalyst is used in purification of antibiotic-containing wastewater (claimed). ADVANTAGE - The graphene-based bismuth tungstate composite photocatalyst has excellent visible light activity, and is prepared by simple, easy and economical method with high yield. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of graphene-based bismuth tungstate composite photocatalyst, which involves mixing graphene oxide and deionized water, obtaining graphene solution, adding bismuth tungstate photocatalyst, stirring, adding hydrazine hydrate, heating, cooling to room temperature, filtering, washing with water and alcohol, and drying; and (2) use of graphene-based bismuth tungstate composite photocatalyst in purification of antibiotic-containing wastewater.