▎ 摘　　要

NOVELTY - Preparing photo-thermal conversion porous structure comprises (i) preparing sodium hydroxide and ammonium persulfate alkaline mixed solution; (ii) ultrasonically cleaning the foamed copper with acetone, alcohol, distilled water, hydrochloric acid solution and the distilled water successively, and drying with nitrogen after cleaning; (iii) soaking the foam copper into sodium hydroxide and ammonium persulfate alkaline mixed solution, then performing constant temperature oxidation, washing the foam copper after oxidation by distilled water, drying, making the foam copper surface form super-hydrophilic nano copper oxide structure; and (iv) using ultrasonic to disperse graphene oxide in distilled water to obtain graphene oxide solution; and (v) soaking the foam copper into graphene oxide solution, thus the graphene oxide is deposited on the surface of foam copper, and then drying at constant temperature to obtain coper oxide/graphene oxide composite photo-thermal conversion structure. USE - The method is useful for preparing photo-thermal conversion porous structure. ADVANTAGE - The method is simple and efficient, does not need complex device and is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for solar evaporation device, comprising the coper oxide/graphene oxide composite photo-thermal conversion structure prepared by above the preparation method and further comprising a heat insulating container, stored with water and the top opening, an insulating layer, which is set in the heat insulation container and located above the water, a water conveying layer, which is set in the heat insulating container and located above the insulating layer, the two sides of the water conveying layer downwards passes through the insulating layer and extends to the water, for absorbing and transmitting the water, the coper oxide/graphene oxide composite photo-thermal conversion structure is set in the heat insulation container and located above the water conveying layer, and the water conveying layer conveys the water to the coper oxide/graphene oxide composite photo-thermal conversion structure.