Interfacial evaporation characteristics of three-dimensional Cu-Fe3O4 nanoparticle film

In an effort to further enhance the evaporation effect of interfacial evaporation, a super-hydrophilic nanoparticle film was prepared by ultrasonic impregnation in this paper. Then, by improving the structure and configuration design of nanoparticle film, the nanoparticle film was transformed from two-dimensional structure to three-dimensional structure. The effects of three-dimensional structure shape, radiation intensity and three-dimensional structure height on the evaporation capacity of nanoparticle films were studied. It was found that the evaporation rate of the three-dimensional rectangular Cu-Fe₃O₄ nanoparticle film with a rectangular height of 15 mm achieved 1.2 kg/m²/h under one sun radiation intensity. The evaporation efficiency can reach 75.44 %, and the thermal efficiency can reach 111.91 %. The design of the three-dimensional structure enables the nanoparticle film to perform double-sided evaporation. At the same time, under the action of natural air convection, the nanoparticle film evaporation efficiency is greatly improved, which provides a design strategy for the nanoparticle film in the field of solar-driven interface evaporation.