▎ 摘　　要

NOVELTY - Continuous permeable graphene film comprises at least 2 layers of graphene and nanochannels or nanopores that provide a fluid passage from one face of the permeable graphene film to the other. USE - The film is useful for making a permeable membrane and a deposited permeable continuous nanochannel graphene film on a support membrane, and purifying a feed water contaminated with a contaminant (all claimed). ADVANTAGE - The film: can be prepared by single-step process without using expensive feedstock gases and using renewable biomass as a carbon source; provides long-term flux stable MD membrane; and facilitates rapid permeation of water vapor and provides effective rejection of contaminants. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a permeable membrane comprising a permeable support membrane overlaid by the film; (2) preparing (M1) a deposited permeable continuous nanochannel graphene film comprising heating a metal substrate and an excess of carbon source in a sealed ambient environment to a temperature that produces carbon containing vapor from the carbon source, so that the vapor comes into contact with the metal substrate, maintaining the temperature for a time to form a graphene lattice, cooling the sample at a retarded cooling rate under reduced pressure for a delay time, and flash cooling the substrate under reduced pressure form a deposited permeable nanochannel graphene; (3) preparing (M2) a deposited permeable continuous nanochannel graphene film on a support membrane, comprising preparing deposited permeable continuous nanochannel graphene film on the substrate, decoupling the film from the substrate to provide a free permeable continuous nanochannel graphene film, and applying the free permeable continuous nanochannel graphene film to the support membrane; and (4) purifying (M3) a feed water contaminated with a contaminant, comprising providing the feed water to the permeable membrane, so that the feed water contacts the continuous permeable graphene film as a feed side, and allowing water to pass through the permeable membrane to a filtrate side to provide a filtrate, where the contaminant is retained on the feed water side.