▎ 摘　　要

NOVELTY - Preparing graphene hydrogel with adjustable internal structure involves ultrasonically dispersing oxidized graphene powder in deionized water to obtain an aqueous dispersion solution of oxidized graphene. The reducing agent is dispersed in the aqueous graphene oxide dispersion solution to form a mixed dispersion solution. The pH of mixed dispersion solution is adjusted by using acid or alkali. The mixed dispersion solution is allowed to react at 50-100 degrees C for 1-12 hour and the obtained product is washed the to obtain graphene hydrogel. USE - Method for preparing graphene hydrogel with adjustable internal structure (claimed). ADVANTAGE - The method enables to prepare graphene hydrogel with adjustable internal structure which is easy to prepare, has mild and controllable reaction condition, does not need complex apparatus, and good for industrial production. DETAILED DESCRIPTION - Preparing graphene hydrogel with adjustable internal structure involves ultrasonically dispersing oxidized graphene powder in deionized water to obtain an aqueous dispersion solution of oxidized graphene. The reducing agent is dispersed in the aqueous graphene oxide dispersion solution to form a mixed dispersion solution. The pH of mixed dispersion solution is adjusted by using acid or alkali. The mixed dispersion solution is allowed to react at 50-100 degrees C for 1-12 hour and the obtained product is washed the to obtain graphene hydrogel. When the pH of mixed dispersion solution increases, the pore size gradually increases from 2 nanometer to 10 nanometer. The pH of mixed dispersion solution is adjusted from 1-14 according to the desired pore size of graphene hydrogel.