▎ 摘　　要

NOVELTY - Producing L-arginine/graphene oxide composite material, comprises: (S1) adding graphene oxide to tetrahydrofuran and dispersing to obtain tetrahydrofuran dispersion of graphene oxide; (S2) adding L-arginine, potassium carbonate powder and deionized water to tetrahydrofuran dispersion of graphene oxide and stirring at room temperature for 24 hours; and (S3) washing many times with water and drying to obtain L-arginine/graphene oxide composite. USE - The L-arginine/graphene-based composite material is useful for adsorbing chromium(VI) ions in a solution (claimed). ADVANTAGE - The method: is mild and simple; and provides L-arginine/graphene-based composite material which shows good chromium(VI) adsorption properties. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) L-arginine/graphene oxide composite material prepared by the above method; and (2) use of L-arginine/graphene oxide composite material for adsorbing chromium(VI) ions in a solution.