▎ 摘　　要

NOVELTY - Preparing nitrogen-doped graphene at large scale, involves (a) adding nitrogen-containing precursor and carbon-containing precursor under the protection of inert gas to high pressure kettle, (b) placing the kettle for 1-20 hours at 150-500 degrees C, (c) treating the obtained product using hydrochloric acid solution (5-37.5 %mass) for 3-5 hours, and washing the obtained product using water and ethanol, respectively until the product becomes neutral, and (d) extracting the obtained product, mixing and drying the obtained product to obtain the nitrogen-doped graphene. USE - The method is useful for preparing nitrogen-doped graphene at large scale. ADVANTAGE - The method is simple, and easy to operate and control.