▎ 摘　　要

NOVELTY - Preparing three-dimensional self-floating heat-insulating high-efficiency light-heat-steam conversion material comprises (1) dispersing the graphene oxide composite nano-sheets with a two-dimensional (2D) layered structure in water, and stirring thoroughly until uniformly dispersed, (2) preparing polyvinyl alcohol polyvinyl acetate (PVA) solution, (3) mixing the PVA solution in step (2) with the 2D layered graphene oxide composite nanosheet solution in step (1) and stirring thoroughly to obtain a homogeneous suspension, and (4) subjecting the homogeneous suspension obtained in step (3) to hydrothermal treatment and freeze-drying to obtain a three-dimensional self-floating heat insulation high-efficiency photothermal steam conversion material. USE - The method is useful for preparing three-dimensional self-floating heat-insulating high-efficiency light-heat-steam conversion material (claimed). ADVANTAGE - The material has broad spectrum absorption, has both self-floating performance and low thermal conductivity, is conducive to the generation of local high temperature, promotes the evaporation of water, prevents a large loss of heat energy, realizes high water evaporation rate and light-to-heat conversion efficiency, material is convenient to manufacture, simple in process, wide in raw materials and low in cost, and is expected to become an efficient material to solve the shortage of fresh water resources. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for three-dimensional self-floating heat-insulating high-efficiency light-heat-steam conversion material obtained by the method as mentioned above.