Design of Superhydrophobic CoFeO Solar Seawater Desalination Device and Its Application in Organic Solvent Removal.

Environmental pollution and clean water production are challenges to the development of human society. In this paper, devices consisting of a superhydrophobic Ni-CoFeO foam layer (floating layer), a hydrophilic channel and a superhydrophilic Ni-CoFeO foam layer (photothermal conversion layer) were designed. The light energy was converted into heat on the photothermal layer, for which the hydrophilic channel provided a small amount of water. The superhydrophobic layer ensured the floating and selective adsorption of organic solvents on the water surface, whose contact angle reached 157°, and the steam production rate reached 1.68 kg·m·h. Finally, the LSV curve demonstrated that the Ni-CoFeO foam prepared had a minimum starting potential, achieving the multifunctionality of the Ni foam.