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Preparation method of cationic metal-organic framework membrane material

A metal-organic framework, cationic technology, applied in chemical instruments and methods, water/sludge/sewage treatment, adsorbed water/sewage treatment, etc. To achieve the effect of ingenious overall conception, simple operation and broad market prospects

Active Publication Date: 2019-12-13
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the mutual combination of charged metal centers and organic ligands of MOFs, it is often electrically neutral, which limits its application in water environments, and also limits its selective adsorption to strongly polar compounds as an adsorbent.
Ionic metal-organic frameworks (iMOFs) is a new type of MOFs material reported in recent years, and its preparation and application research is still in its infancy.

Method used

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  • Preparation method of cationic metal-organic framework membrane material
  • Preparation method of cationic metal-organic framework membrane material
  • Preparation method of cationic metal-organic framework membrane material

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Embodiment 1

[0029] The preparation method of the cationic metal-organic framework material involved in the embodiment specifically includes the following steps:

[0030] S1. Preparation of metal-organic framework material NH2-UiO-66

[0031] (1) 0.23g of zirconium tetrachloride and 0.16g of aminoterephthalic acid were dissolved in 50mLN,N-dimethylformamide (DMF) solution and fully stirred and dissolved;

[0032] (2) reacting the mixture prepared in step (1) at 120° C. for 48 hours in a solvothermal reactor;

[0033] (3) Cool the solvothermal reaction kettle to room temperature, wash the obtained product several times with DMF, dry at 100°C for 12 hours, soak and wash the obtained product in ethanol several times, and dry at 70°C for 12 hours to obtain The metal-organic framework material NH2-UiO-66 is spare;

[0034] S2, preparation of NH2-UiO-66 mixed matrix membrane

[0035] (1) Disperse 60 mg of NH2-UiO-66 in 2 ml of acetone, ultrasonically disperse for 10 min, dissolve 40 mg of pol...

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Abstract

The invention provides a preparation method of a cationic metal-organic framework membrane material, and belongs to the field of metal-organic framework materials. A metal-organic framework material UiO-66-NH2 is prepared from aminoterephthalic acid and metalklic zirconium, and then a UiO-66-NH2 membrane is prepared from granular UiO-66-NH2 and polyvinylidene fluoride by adopting a mixed matrix process; and amino groups of the UiO-66-NH2 membrane are quaternized with methyl trifluoromethanesulfonate, and finally the quaternized UiO-66-NH2 membrane is acidized to form the cationic UiO-66-NMe<3+> membrane with an anion exchange group. The UiO-66-NMe<3+> material in the membrane form retains the efficient selective adsorbability of the metal-organic framework material, can be conveniently separated from an aqueous solution, and has a good application prospect in removal and enrichment of anionic pollutants in water.

Description

Technical field: [0001] The technical field of the metal-organic framework material of the present invention relates to a preparation method of a cationic metal-organic framework membrane material. Background technique: [0002] Metal-organic frameworks (MOFs) are a kind of nanoporous materials formed by organic-inorganic hybridization, and are currently one of the research hotspots and frontiers in the field of new materials. Metal-organic framework materials are mainly three-dimensional network structure crystals formed by the coordination bonding of aromatic acids or bases containing nitrogen and oxygen polydentate organic ligands and inorganic metal centers. Because MOFs materials combine inorganic components with organic components, they have many advantages compared with traditional porous materials, such as various types, strong functions, large porosity and specific surface area, strong controllability of pore size, and certain biocompatibility. [0003] Due to the...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/14C08J5/18C08L87/00C08L27/16C08G83/00C02F1/28
CPCC02F1/285C08G83/008C08J5/18C08J7/12C08J7/14C08J2387/00C08J2427/16
Inventor 马继平吴阁格
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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