▎ 摘　　要

NOVELTY - Preparing highly active nitrogen-doped graphene by laser irradiation comprises e.g. (i) preparing graphene oxide by improved Hummers method, mixing graphene oxide and ethanol solution, (ii) placing sample in a conical flask, and irradiating with nanosecond pulsed laser, (iii) subjecting sample obtained in step (ii) to high-speed centrifugation to obtain precipitate and freeze-drying, and (iv) mixing sample obtained in step (iii) with ammonium bicarbonate, pouring mixed solution into reaction kettle, reacting, and (v) centrifugating sample obtained in step (iv), washing, and lyophilizing. USE - The method is useful for preparing highly active nitrogen-doped graphene by laser irradiation (claimed). ADVANTAGE - The method has simple process, convenient operation, easy control, and is environmentally friendly. DETAILED DESCRIPTION - Preparing highly active nitrogen-doped graphene by laser irradiation comprises (i) preparing graphene oxide by improved Hummers method, mixing graphene oxide and ethanol solution in a ratio of 1:1-1:10 mg/ml, performing ultrasound treatment, (ii) placing 10-50 ml sample in a conical flask, and irradiating with nanosecond pulsed laser for 10-50 minutes, (iii) subjecting sample obtained in step (ii) to high-speed centrifugation at speed of 12000-20000 revolution/minutes to obtain precipitate and freeze-drying, and (iv) mixing sample obtained in step (iii) with ammonium bicarbonate in a mass ratio of 1:1-1:50, pouring mixed solution into reaction kettle, reacting at 90-200 degrees C for 5-20 hours, and (v) centrifugating sample obtained in step (iv), washing three times, and lyophilizing.