▎ 摘　　要

NOVELTY - Preparation of large-area graphene sponge comprises ultrasonic dispersing graphite oxide in solvent to form 0.1-5 mg/ml graphene oxide suspension, placing substrate on heating platform, adjusting temperature of substrate, spraying graphene oxide suspension using spray gun on substrate, carrying out reduction, placing in sealed container filled with hydrazine, and heating to 75-110 degrees C for 5-48h. USE - Method for preparing large-area graphene sponge (claimed). ADVANTAGE - The sponge has large area and excellent ability to absorb oil and organic solvent. The method is inexpensive, simple and easy to operate.