▎ 摘　　要

NOVELTY - Preparing nano-particle doped photothermal conversion composite phase change material involves ultrasonically dispersing graphene oxide powder in an ethylene glycol solution. The copper acetate and thiourea are slowly added to the above solution, and then the reduced graphene oxide copper oxide carrier material is prepared by hydrothermal method, by changing the amount of graphene oxide input. The impregnation method disperses the graphene oxide copper oxide carrier in the prepared solution containing the phase change material, and uses the large specific surface area of graphene to adsorb the organic phase change material. The composite phase change material is dried at a temperature higher than the phase change temperature. USE - Method for preparing nano-particle doped photothermal conversion composite phase change material. ADVANTAGE - The method enables to prepare nano-particle doped photothermal conversion composite phase change material with excellent photothermal conversion property and good circulation stability.