▎ 摘　　要

NOVELTY - Preparing graphene-based bismuth-based heterostructure catalyst comprises dissolving sodium molybdate and bismuth nitrate in ethylene glycol, adding bismuth nitrate solution into the sodium molybdate solution in a drop wise manner, uniformly stirring to prepare mixed solution 1, introducing absolute ethanol into mixed solution 1, uniformly stirring, adding alkaline solution, stirring, washing, filtering and drying to obtain bismuth molybdate, dissolving graphite oxide and ultrasonically dispersing to obtain graphene oxide solution, dissolving bismuth molybdate, nickel salt and iron salt and stirring to obtain mixed solution 2, changing mixed solution and dropping into graphene solution, adding alkaline solution again, stirring and reacting, suction filtering, washing, drying and grinding to obtain graphene-based bismuth-based heterostructure catalyst. USE - The graphene-based bismuth-based heterostructure catalyst is useful in degradation of tetracycline hydrochloride. ADVANTAGE - The catalyst: has good catalytic degradation performance of tetracycline hydrochloride; and is environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of graphene-based bismuth-based heterostructure catalyst in degradation of tetracycline hydrochloride.