| CPC C01B 32/184 (2017.08) [B82Y 40/00 (2013.01); C01P 2002/52 (2013.01); C01P 2002/82 (2013.01)] | 31 Claims |

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1. An ultrafiltration membrane, wherein said ultrafiltration membrane comprises a nano-defective graphene film, wherein the nano-defective graphene film has an ID/IG ratio of 1.2 or higher, and wherein said nano-defective graphene film is a monolayer.
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