Origami-like 3D Fog Water Harvestor with Hybrid Wettability for Efficient Fog Harvesting

Collecting water in fog has alsobecome a breakthrough to solvethe hidden danger of water shortage in some arid areas. The three-dimensional(3D) structure fog collection material can increase the surface areain direct contact with the fog flow and reduce the quick flow of fog,which can effectively improve the fog collection efficiency. Imitatingthe three-dimensional structure of corrugated paper, the 3D fog collectingmaterial with hybrid wettability was prepared by chemical and physicalmeans. We discuss the influence of different wettability combinationson the fog collection efficiency of 3D structures and study the influenceof spraying times and illumination times on the surface wettabilityduring the construction of wettability. We also study the influenceof the concavity and tip as well as the bending angle on the fog collectionin the 3D structure and obtain the most reasonable concavity and convexratio and bending angle. The superhydrophilic and superhydrophobic3D structure fog harvesting material prepared by us performs wellin the fog harvesting process, and the fog harvesting efficiency reaches1.442 g cm(-2) h(-1). The fog collectionefficiency is 418% of the original zinc sheet. At the same time, comparedwith the superhydrophilic and superhydrophobic hybrid two-dimensional(2D) plane, the increase is 168%, and compared with the superhydrophobic3D structure, the increase is 150%.