▎ 摘　　要

NOVELTY - Preparing nitrogen-doped graphene material, comprises heating graphene oxide under ammonia-argon gas mixture atmosphere, and then treating to obtain final product. USE - The nitrogen-doped graphene material is useful for removing tetracycline hydrochloride in water (claimed). ADVANTAGE - The method: has simple process, short period, and low cost; and is suitable for industrial production. The nitrogen-doped graphene material: adsorbs and catalyzes the oxidative degradation of tetracycline hydrochloride in water; has fast removal rate; ensures rapid and complete degradation of tetracycline hydrochloride; and is environmentally friendly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) nitrogen-doped graphene material prepared by the above method; and (2) use of nitrogen-doped graphene material for removing tetracycline hydrochloride in water.