▎ 摘　　要

NOVELTY - Chitosan is dissolved in 3% acetic acid solution, mixed uniformly, 2-10 g/L sodium periodate is added, reacted at 40-80 degrees C for 10-60 minutes, the reaction mixture is washed with deionized water, centrifuged and dried, to obtain sodium periodate-modified chitosan. 0.01-100 g/L Sodium periodate-modified chitosan solution and 0.01-0.5 g/L graphene oxide solution are mixed uniformly, hydrothermal reaction is performed at 120-160 degrees C, to obtain graphene solution, the graphene solution is washed with ethanol and deionized water, centrifuged and dried, to obtain graphene powder. USE - Preparation of graphene powder (claimed). ADVANTAGE - The method provides graphene powder having excellent dispersibility and stability, by simple, economical and environmentally-friendly process. DETAILED DESCRIPTION - Chitosan is dissolved in 3% acetic acid solution in ratio of 1:50, mixed uniformly for 1-12 hours, 2-10 g/L sodium periodate is added, reacted at 40-80 degrees C for 10-60 minutes, the resultant reaction mixture is washed repeatedly with deionized water, centrifuged and dried, to obtain sodium periodate-modified chitosan. 0.01-100 g/L Sodium periodate-modified chitosan solution and 0.01-0.5 g/L graphene oxide solution are mixed uniformly, hydrothermal reaction is performed at 120-160 degrees C for 1-10 hours, to obtain graphene solution, the graphene solution is washed repeatedly with ethanol and deionized water, centrifuged and dried, to obtain graphene powder.