▎ 摘　　要

NOVELTY - Preparation of graphene photothermal conversion material comprises mixing graphene powder, polymer material having a chain molecular structure and solvent to obtain slurry, adding to mold, heating to carry out carbonation of organic material and obtain graphene foam having good mechanical strength, subjecting bottom side to hydrophilization treatment. USE - Method for preparation of graphene photothermal conversion material used for seawater desalination and wastewater treatment (all claimed). ADVANTAGE - The conversion material has high thermal conductivity which can convert the sunlight efficiently into heat, and foam structure which continuously transport water and reduce its evaporation potential in order to achieve rapid distillation of seawater desalination.