Preparation method and application of MOFs composite material

The invention provides a preparation method of a MOFs composite material. According to the preparation method, the MOFs composite material is prepared by taking seaweed residue as araw material, the MOFs composite material is rich in functional groups, porous channel structures are formed on the surface after carbonization, and a large number of heavy metal ions in sewage can be adsorbed by utilizing the porous channel structures; in the process of preparing the MOFs composite material, a to-be-impregnated material is placed in a nano noble metal solution to be soaked, nano noble metal particles are formed on the surface of the soaked composite material, and the nano noble metal particles have good catalytic performance and can further catalyze decomposition of pollutants in sewage; the MOFs composite material also comprises polyacrylonitrile and polyethylene glycol, the soaked composite material is mixed with polyacrylonitrile and polyethylene glycol and then carbonized, and polyacrylonitrile and polyethylen