| abstract |
The invention discloses a multi-level heterostructure membrane for photothermal seawater desalination and a preparation method. The membrane is based on a porous metal mesh, and a porous metal-carbon nanotube membrane is prepared by a chemical vapor deposition method; Methods The sulfide Ni 3 S 2 was grown on the surface of the porous metal film to form the porous metal/carbon nanotube/Ni 3 S 2 heterostructure film. The metal mesh of the present invention uses macroscopic pores as water transmission channels. After carbon nanotubes are prepared on the metal mesh, since the carbon nanotubes are relatively thin, according to the total flow continuity equation in fluid mechanics: V 1 A 1 =C, where V is the flow velocity, A is the cross-sectional area of the pipe, C is a constant, the thinner the pipe, the smaller the cross-sectional area A, the greater the liquid velocity V in the pipe, the faster the liquid flows, which is equivalent to increasing the transmission of water channel, the Ni 3 S 2 heterolayer grown on the carbon nanotubes has excellent light absorption ability, which increases the evaporation of seawater. |