Patent ID: 10434476

Abstract:
The invention relates to a multilayer metallic or ceramic membrane device, comprising a macroporous carrier layer including pores having a pore diameter of more than 50 nm, and at least one mesoporous intermediate layer disposed thereon, including pores having a pore diameter of 2 nm to 50 nm. The membrane device according to the invention furthermore comprises at least one microporous cover layer disposed on the mesoporous intermediate layer, including pores having an average pore diameter of 0.3 nm to 1.5 nm, comprising graphite oxide or few-layer graphene oxide or graphite or few-layer graphene. In an advantageous embodiment, the cover layer comprises between 5 and 1000 layers of graphene oxide. In an advantageous embodiment, the cover layer can comprise between 5 and 1000 layers of partially reduced graphene oxide or graphene as a result of the at least partial reduction of the graphene oxide. The multilayer, chemically and mechanically stable and temperature-resistant membrane device according to the invention, comprising the functional cover layer thereof including microporous graphene oxide or graphene, is advantageously suitable for use in water separation or purification, or for gas separation.