▎ 摘　　要

NOVELTY - Graphene oxide-based lead ion imprinted composite material comprises graphene oxide and a multilayer composite structure with uneven thickness composed of lead ion imprinted polymer uniformly distributed on the surface of the graphene oxide layer and the lead ion imprinted polymer is further dispersed with a hole. USE - The material is useful for removing lead ions in water (i.e. adsorption capacity for lead ions is greater than or equal to 96.5% when the water temperature is 25 degrees C) (claimed). ADVANTAGE - The material has high selectivity to lead ion; has good regeneration and recycling performance and no obvious attenuation after repeated use for many times. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the graphene oxide-based lead ion imprinted composite material, comprising taking modified graphene oxide obtained by modifying graphene oxide with organosilicon reagent, placing lead ion imprint and compound on the surface of the modified graphene oxide and removing the lead ion template, where the organosilicon reagent includes (3-methacryloylpropyl)-trimethoxysilane, gamma -glycidoxypropyltrimethoxysilane or gamma -aminopropyltrimethoxysilane.