▎ 摘　　要

NOVELTY - Preparing graphene oxide-based chiral nanocomposite material comprises (i) dispersing the L-amino acid derivative gel factor in a metal ion solution, heating and cooling to obtain a composite hydrogel, where the L-amino acid derivative gel factor is a hydrogel factor with a benzene ring as the central core, L-phenylalanine as a side chain, and an amide bond as a linking chain to connect positions 1, 4 of the central core with the side chain and the metal ion is calcium ion, aluminum ion, copper ion or terbium ion.; (ii) dropping the graphene oxide solution into the composite hydrogel, shaking and mixing uniformly, and allowing to stand at room temperature for layering; and (iii) filtering to obtain graphene oxide-coated chiral solid composite material. USE - The nanocomposite material is useful for separating amino acid enantiomers and analyzing amino acid enantiomer content (all claimed). ADVANTAGE - The method solves the problems of low separation efficiency, complicated operation, difficult recycling and low reusable rate in the existing enantiomer separation process, and does not require complicated synthesis steps. The composite material can realize chiral conversion under the control of metal ions, and realize the adsorption of different types of amino acid enantiomers according to different chiral structures, obtains effective separation, is easy to recycle, can be reused many times, is convenient to operate, and has practical application value. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a graphene oxide-based chiral nanocomposite material obtained by the above mentioned method; and (2) use of graphene oxide-based chiral nanocomposite material for separating amino acid enantiomers.