▎ 摘　　要

NOVELTY - The preparation method of nitrogen-doped graphene hydrogel involves preparing a certain concentration of graphene oxide solution, mixing and ultrasonically processing to obtain uniform dispersion lamellar graphite oxide solution, adding ammonium bicarbonate, stirring and ultrasonically processing, mixing to obtain solution (a), adding sodium sulfide to solution (a), stirring, and dissolving to obtain solution (b), placing the solution (b) in an oven, heating, removing samples from the oven, and repeatedly washing with water. USE - Preparation of nitrogen-doped graphene hydrogel (claimed). ADVANTAGE - The method enables the preparation of nitrogen-doped graphene hydrogel at low temperature.