Preparing method of micropore carbon-metal composite membrane capable of purifying haze in the air

The invention discloses a preparing method of a micropore carbon-metal composite membrane capable of purifying haze in the air. The molecular structure of the precursor of the metal composite membrane is polyimide polymer with a structural character of regular ducts. The micropore carbon-metal composite membrane is green and environmentally friendly in productive process, is characterized by having high temperature resistance, anti microbe, acid and alkali resistance and abundant super fine micropore structures and the like, and has a special advantage in removing PM 2.5 in the air. Through molecular designing, the polymer with a high free volume and the structural character of regular ducts is synthesized to be the precursor of the carbon membrane; by conducting building, adjusting and controlling on refined micropore structure and measure of the carbon membrane on a micro-level and loading metals such as platinum, rhodium and palladium which can catalyze and degrade nitric oxide to the surface of the carbon