▎ 摘　　要

NOVELTY - Composite photocatalyst of core-shell structure comprises bismuth subcarbonate as inner core and reduced graphene oxide is wrapped on the surface of bismuth subcarbonate. USE - Composite photocatalyst of core-shell structure used in degrading antibiotic (claimed). ADVANTAGE - The composite photocatalyst of core-shell structure has good photocatalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite photocatalyst of core-shell structure, which involves taking graphene oxide and adding de-ionized water, ultrasonically dispersing to obtain precursor liquid B, taking comprises bismuth subcarbonate powder, adding into absolute ethyl alcohol, ultrasonically dispersing after ultraviolet irradiation treatment to obtain precursor liquid C, under the condition of stirring, mixing the precursor solution B and the precursor liquid C for ultraviolet light processing for 3-9h, washing and drying the obtained product to obtain the desired product.