Water Skin Effect and Arched Double‐Sided Evaporation for Boosting All‐Weather High Salinity Desalination

Abstract High efficiency, long‐term salt rejection, and continuous operation under all‐weather conditions have always been the goals of solar‐driven desalination of high salinity brine. Here, a synergistic strategy of water skin effect and double‐sided evaporation is proposed by an arched evaporator to overcome the above issues. Specifically, a hydrophobic carbon‐fiber cloth (CC) is coated with metal‐organic framework (MOF)‐derived superhydrophilic carbon films, and bent into an arch‐like configuration. Due to unique hydrophobic‐core/hydrophilic‐shell structure, an ultrathin water film (30–150 µm) is confined to the outer layer like skin. Thanks to the water skin effect and coevaporation of outer and inner…

• NN
  National Natural Science Foundation of China

  Award: 52075309
• SP
  Shaanxi Provincial Science and Technology Department

  Awards: 2021GY‐248, 2021-6, 2021GY-248