Abstract
Metal-organic framework materials have the advantages of large specific surface area, high porosity, strong adjustability of framework structure, adjustable chemical and thermal properties, etc., and can be used as ideal membrane materials. In this paper, the preparation methods and conditions of several common metal-organic framework materials, as well as how to adjust the pore size, are reviewed, and the advanced membrane treatment technology is prospected.
Highlights
Common preparation methods of metal-organic framework films include in-situ synthesis, secondary growth, mixed matrix membrane, chemical modification of carrier surface and layer-by-layer growth
The surface of α-Al2O3 carrier was modified by polyethyleneimine, and the MOF synthesized by Cu (NO3) 2 ·3H2O and 4,4- hexafluoroisopropylidene benzoic acid was connected with the modified α-Al2O3 to prepare a continuous and dense
1-D Cu (ii)-BTC seeds with suitable concentration were spin-coated on α-Al2O3, and the dense Cu3(BTC)2 films were successfully prepared by secondary growth
Summary
In-situ synthesis is a method of soaking the carrier without any crystal in the precursor solution, growing a large number of crystals. The metal-organic framework material forms crystal nucleus, and it grows alternately to produce continuous thin films. Huang Aisheng's research group [1] used different coupling agents (such as silane, dopamine, etc.) as connecting carriers, and prepared different ZIF series
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