▎ 摘　　要

NOVELTY - Composition comprises bismuth ferrite (60-95%) and graphene (5-40%). USE - The composition is useful for treating the contaminants in the environment and in magnetic visible light catalyst (claimed) for visible light catalytic processing of methylene blue solution, and in waste water treatment. ADVANTAGE - The composition has good degradation effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the composition comprising (a) ultrasonically dispersing synthetic graphite in water using Hummers method, (b) dissolving bismuth nitrate and iron (III) nitrate in diluted nitric acid, continuously stirring the mixture, adding alkali solution and then mineralizing the agent solution, (c) ultrasonically mixing the obtained graphite into solution and then washing with water, (d) adding alkali solution and mineralizing agent solution into the graphite, stirring the mixture and then transferring into a hydro-thermal reaction kettle, (e) mixing the obtained extracts, centrifuging and separating the extracts after washing and then drying.