▎ 摘　　要

NOVELTY - Preparing graphene quantum dots and zeolitic imidazolate framework (GQDs@ZIF-8) type metal organic frame material involves mixing the carbon source, histidine and water, and freeze-drying to obtain a freeze-dried mixture. The freeze-dried mixture is heated to perform a pyrolysis reaction, obtained a pyrolysis reaction solution, and the pyrolysis reaction solution includes methylimidazole modified graphene quantum dots. The pyrolysis reaction liquid is mixed with the lye and stirring to obtain the lye, and adjusted the pH value of the alkalizing solution to 6.5-7.5. The obtained liquid is dialyzed and dried sequentially to obtain methyl imidazole modified graphene quantum dots. The aqueous dispersion of methylimidazole modified graphene quantum dots and the soluble divalent zinc solution are blended and centrifuged in sequence, and obtained GQDs@ZIF-8 metal organic frame material. USE - Method for preparing graphene quantum dots and zeolitic imidazolate framework type metal organic frame material used for volatile organic compounds (VOCs) monitoring (Claimed). ADVANTAGE - The method enables to prepare a graphene quantum dots and zeolitic imidazolate framework type metal organic frame material has a methyl imidazole active site, and has high sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a GQDs@ZIF-8 metal organic framework material, which comprises a graphene quantum dots and a ZIF-8 type metal organic framework material modified on the surface of the graphene quantum dots.