▎ 摘　　要

NOVELTY - Preparing nitrogen-doped graphene comprises placing a metal catalyst in a reactor, heating the catalyst at 200-600 degrees C under non-oxidizing atmosphere, inletting carbon and nitrogen source in the reactor to react, and processing chemical vapor deposition to obtain the nitrogen-doped graphene. USE - The nitrogen-doped graphene is useful for preparing electrical devices (claimed). ADVANTAGE - The method is simple, economical and environment-friendly, and is suitable for large-scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the nitrogen-doped graphene prepared by above mentioned method.