▎ 摘　　要

Designing and developing advanced materials with reversible switching wettability are highly desirable for on-demand separation of oil/water emulsions. An advanced nanostructured porous membrane material with strong switchable wettability is successfully fabricated by depositing a modified graphene oxide complex onto metal meshes via a simple one-step electrodeposition method. Membranes with hydrophilic and underwater-superoleophobic properties can be converted to superhydrophobicity after rinsing with organic solvents, and they enable to be triggered back to the initial wettability by the negative electrical potential. As demonstrated, this wettability switch is driven by a change in the orientation of the molecular structure. Integrated with nanostructure, proper pore size, and switchable wettability, the mesh membrane realizes on-demand immiscible oil/water mixture and oil/water emulsion separation without energy-consumption. In addition, the corrosion resistance and simplicity of the system show great potential for practical applications.