Metal-organic framework material separation membrane, preparation method therefor, and use thereof

A preparation method for a metal-organic framework material separation membrane, comprising the following steps:

• (1) preparing a solution containing a first organic solvent, an organic ligand, a first metal compound, and an auxiliary agent that is water or glacial acetic acid;
• (2) subjecting a base membrane to a pretreatment, wherein the pretreatment comprises introducing, on the surface of the base membrane, metal atoms of the first metal compound in step (1);
• (3) mixing the pretreated base membrane in step (2) with the solution in step (1) to obtain a first mixture, and heating the first mixture for reaction, so as to obtain the metal-organic framework material separation membrane;
• and
• (4) optionally, subjecting the separation membrane to a cleaning treatment,
• wherein in step (3), a ratio of a surface area of the pretreated base membrane in step (2) to a volume of the solution obtained in step (1) is (0.01-100) m2/L, and
• wherein the base membrane is selected from one or more of polypropylene membrane, polyethylene membrane, polyvinyl chloride membrane, and polytetrafluoroethylene membrane.