Preparation method and application of porous nano sponge loaded MOF (Metal Organic Framework) material

The invention provides a preparation method of a porous nano sponge loaded MOF (Metal Organic Framework) material, which comprises the following steps: immersing a cleaned melamine sponge into a dopamine hydrochloride-tris (hydroxymethyl) aminomethane buffer solution at room temperature, cleaning and drying to obtain a treated polydopamine-melamine sponge; immersing the compounded sponge into a solution prepared from chitosan and acetic acid, adding glutaraldehyde to further promote crosslinking, and freeze-drying to obtain chitosan-cobalt ion composite sponge; and adding the composite sponge into a 2-methylimidazole-methanol solution at room temperature, stirring, washing, freezing and drying to obtain the porous nano sponge loaded MOF material. The obtained material has a porous structure and a high specific surface area, the preparation method is simple, the cost is low, and the service life of the material can be prolonged and the generation of wastes can be reduced through a regeneration step; and the ma