| abstract |
The invention relates to a three-dimensional cyclodextrin/graphene aerogel composite adsorption material containing an amidoxime group and a preparation method and application thereof. The combination of the oxygen functional group and the oxygen-containing functional group of the cyclodextrin, on the one hand, introduces an amidoxime group, which greatly enhances the selective adsorption capacity of the composite material for hexavalent uranium; Amino group, which can react with oxygen-containing groups on graphene oxide sheets and oxygen-containing groups on carboxymethyl-β-cyclodextrin, so that amidoxime groups are cross-linked to graphene aerogels , increasing the degree of cross-linking of aerogels is beneficial to the formation of aerogels, and at the same time, the specific surface area of the composite material is greatly improved, giving the material a strong adsorption capacity, and it is used for enriching hexavalent uranium with a high enrichment rate. , The adsorption time is short. |