MXene precipitate/polyvinyl alcohol/sodium alginate composite aerogel three-dimensional evaporator and preparation method thereof

The invention relates to the technical field of seawater desalination, in particular to an MXene sediment/polyvinyl alcohol/sodium alginate composite aerogel three-dimensional evaporator and a preparation method of the MXene sediment/polyvinyl alcohol/sodium alginate composite aerogel three-dimensional evaporator. The upper surface of the heat insulation carrier is provided with a three-dimensional aerogel body which is formed by continuously and vertically arranged porous channels formed by directionally freezing polyvinyl alcohol, sodium alginate and MXene precipitates, the side surface temperature of the three-dimensional aerogel body is lower than the environment temperature, the surface of the three-dimensional aerogel body is provided with a stable water film layer, and the three-dimensional aerogel body is high in evaporation rate and resistant to salt; a water guide piece in contact with the three-dimensional aerogel body is arranged in each hole. The MXene sediment is used as a photo-thermal material