▎ 摘　　要

NOVELTY - Preparing graphene-based photo-thermal conversion material comprises (i) taking silicon carbide in the graphene oxide solution and ultrasonic stirring to obtain graphene oxide mixed solution, (ii) adding surfactant stirring and allowing to stand in the water, until all bubbles are on the liquid surface to form bubble cluster, (iii) adding the bubble cluster into the graphene oxide mixed solution, stirring to obtain the complex precursor, and (iv) quickly freezing the complex precursor, then freezing and drying to obtain graphene oxide-silicon carbide foam, and carrying out heat treatment to obtain the graphene-based photo-thermal conversion material. USE - Preparation method of graphene-based photo-thermal conversion material used in sea water desalination technology. ADVANTAGE - The graphene-based photo-thermal conversion material has high light absorption rate, high light steam conversion efficiency, low cost and simple synthesis technique, and improved hydrophilicity and local thermal property of the material, and has good application prospect.