▎ 摘　　要

NOVELTY - A nanofiber molecular sieve membrane comprises a base membrane, a selective separation layer, which is covered on the surface of the base membrane, and comprises reduced graphene oxide nanosheets, and a host-guest compound comprising silver and cucurbituril filled between the nanosheets. USE - The nanofiber molecular sieve membrane is useful in separation of neutral compounds in aqueous solution (claimed). ADVANTAGE - The nanofiber molecular sieve membrane has improved selectivity of small molecules while retaining water permeability, through precise construction of nano-transmission channels using the host-guest compound. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: preparation of the nanofiber molecular sieve membrane, which involves (1) obtaining a nanofiber base membrane, (2) mixing a silver-containing compound, cucurbituril and graphene oxide with water to obtain a mixed suspension, applying on the surface of the base membrane, and removing redundant water, and (3) thermally reducing graphene oxide on the composite membrane obtained in step (2); and use of cucurbituril or a silver-containing compound for improving the interception performance of the reduced graphene oxide membrane for organic substance.