▎ 摘　　要

NOVELTY - Preparing graphene hydrogel, comprises adding graphene oxide solution into reducing agent, ultrasonically dispersing, heating reaction, completing reaction, removing product and washing to obtain graphene hydrogel. USE - The graphene hydrogel is useful as an adsorbent for absorbing antibiotic in sewage (all claimed). ADVANTAGE - The method improves the surface area of the material, enhances adsorption effect, reduced to give graphene hydrogel under mild conditions, reduces environmental pollution, does not discharge hazardous materials, suitable for large-scale commercial production and is simple, easy process and economical to prepare.