Preparation method and application of a metal-organic framework membrane assembled on the surface of zeolite molecular sieve grains

Abstract

The invention discloses a preparation method and application of a zeolite molecular sieve crystal surface assembled metal organic framework membrane. The preparation method comprises the steps of: firstly adding a metal cobalt salt, aromatic carboxylic acid, a molecular sieve and an organic solvent into a container and carrying out full mixing reaction, then conducting purification and vacuum drying treatment to obtain a precursor of the zeolite molecular sieve crystal surface assembled metal organic framework membrane material; then putting the precursor into an airtight device and carrying out steam assisted crystallization reaction, finally subjecting the product to purification and drying treatment, thus obtaining the zeolite molecular sieve crystal surface assembled metal organic framework membrane material. The preparation method provided by the invention combines low-temperature assembly and steam assisted crystallization for preparation, is rapid in reaction, greatly shortens the synthesis time, and substantially lowers the energy consumption, also the synthesis method is simple, the yield is high, no harsh condition exists in the synthesis process, and a lot of tedious procedures are eliminated.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic non-metallic catalytic materials, in particular to a preparation method and application of a metal-organic framework membrane assembled on the surface of zeolite molecular sieve grains. Background technique [0002] Metal-organic frameworks (MOFs) are unique self-assembled metal ions or clusters of metal ions and suitable multidentate bridging ligands through covalent bonds or ion-covalent bonds. A class of inorganic-organic hybrid porous materials with controllable size and morphology (Z.Y.Li, C.J.Cramer and O.K.Farha. Sintering-Resistant Single-Site Nickel Catalyst Supported by Metal-Organic Framework.J.Am. Chem.Soc.2016,138,1977-1982.), which combines the characteristics of both inorganic compounds and organic compounds. Due to the complexity of its composition, the diversity of metals and ligands, and the adjustable coordination environment, MOFs have become one of the most p...

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Problems solved by technology

[0004] In summary, MOFs series materials have become a hot spot in the research field as a very promising material for adsorption, separation and catalysis. Although there is a certain degree of research on hybrid membranes, so far, MOFs have not been used in inorganic materials. The preparation of membranes on molecular sieve materials and the research on catalytic applications are still less, which limits the application of pure MOFs membrane organic materials and inorganic materials in catalytic reactions and the control of product selectivity.

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