| 摘要 |
The invention relates to a multi-layer, metal or ceramic membrane device comprising a macro-porous substrate layer having pores with a pore diameter greater than 50 nm, and at least one meso-porous intermediate layer arranged thereon and having pores with a pore diameter of 2 to 50 nm. The membrane device according to the invention additionally comprises at least one micro-porous covering layer arranged on the meso-porous intermediate layer and having pores with an average pore diameter of 0.3 to 1.5 nm, comprising graphite oxide or few-layered graphene oxide or graphite or few-layered graphene. In an advantageous embodiment, the covering layer comprises between 5 and 1000 layers of graphene oxide. Via at least partial reduction of the graphene oxide, in an advantageous embodiment, the cover layer can comprise between 5 and 1000 layers of partially reduced graphene oxide or graphene. The multi-layer, chemically and mechanically stable and temperature resistant membrane device according to the invention, comprising the functional micro-porous graphene oxide or graphene-containing covering layer, is advantageously suitable for use in water separation or water purification, or also for gas separation. |
