This invention relates to the field of materials technology, and more particularly to a 3D-printed, internally hollowed-cone solar interface
evaporator with directional salt deposition function, its preparation method, and its application. The invention includes step 1: three-dimensional model construction; step 2:
substrate surface pretreatment and chemical activation; and step 3: hydrothermal preparation of a Co-Bi-S
coating. This invention uses a 3D-printed porous, internally hollowed-cone resin device as a substrate, and grows a Co-Bi-S
coating in situ on its surface using a hydrothermal method. This
coating exhibits both excellent
photothermal conversion performance and
corrosion resistance. The
evaporator structure is designed as a porous, internally hollowed-cone shape, which provides a larger
evaporation area, stronger light capture and focusing capabilities, and can achieve higher
evaporation temperatures and directional salt deposition effects. The prepared solar interface
evaporator exhibits excellent
photothermal conversion performance and water
evaporation efficiency, and also demonstrates good
structural stability and
corrosion resistance. This solves the technical problems of low
photothermal conversion efficiency and poor stability in high-salt environments inherent in traditional solar evaporators, making it suitable for applications such as
seawater desalination.