IL-coated MOFs composite material and preparation method and application thereof

The invention relates to the technical field of nano porous materials, in particular to an IL (at) MOFs composite material and a preparation method and application thereof, and the method comprises the following steps: preparing MIL-101 (Cr) from an organic ligand and metal salt; preparing [BOHmim] Cl from the cation donor and the anion; mIL-101 (Cr) is activated and degassed in vacuum and added into a methanol solution dissolved with [BOHmim] Cl, magnetic stirring is conducted for a certain time under the room-temperature open atmosphere condition, and vacuum and normal-pressure switching is conducted till no bubble is generated; and evaporating the methanol to dryness, and drying to obtain the IL-coated MOFs composite material. The IL (at) MOFs composite material has high SO2 adsorption capacity and strong selectivity, can realize deep and selective removal of trace SO2, and has good stability and SO2 corrosion resistance. 本发明涉及纳米多孔材料技术领域，具体地说，是一种IL@MOFs复合材料及其制备方法与应用，该方法用有机配体和金属盐制得MIL-101(Cr)；用阳离子供体和阴离子制得[B