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MOFs (Metal-Organic Frameworks) with ph stability as well as preparation method and application of MOFs

A metal-organic framework and stable technology, applied in the direction of separation methods, zinc organic compounds, chemical instruments and methods, etc., can solve the problems of limited application, instability, poor thermal stability and acid-base stability of MOFs, and achieve good acid-base The effect of stability, low cost and good separation effect

Inactive Publication Date: 2014-11-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, a large number of MOFs with gas adsorption and separation properties have been synthesized and reported, but due to the poor thermal stability and acid-base stability of most MOFs, they are unstable in air, which limits their applications.

Method used

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  • MOFs (Metal-Organic Frameworks) with ph stability as well as preparation method and application of MOFs
  • MOFs (Metal-Organic Frameworks) with ph stability as well as preparation method and application of MOFs
  • MOFs (Metal-Organic Frameworks) with ph stability as well as preparation method and application of MOFs

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Embodiment

[0019] A metal-organic framework material stable to acid and alkali, the chemical formula is {[Zn 2.5 (nbta)(trz) 2 (H 2 O)] 3H 2 O} n , where: n is a natural number from 1 to positive infinity, where nbta is 5-nitro-1,2,3-benzenetricarboxylate ion, trz is 1H-1,2,4-triazole; the metal organic The frame material is made of transition metal Zn 2+ A three-dimensional network structure formed by ions and organic ligands through coordination bonds or intermolecular forces, in which the organic ligands are 5-nitro-1,2,3-benzenetricarboxylic acid and 1H-1,2,4-triazine azole; the three-dimensional network structure contains three kinds of Zn with different coordination modes 2+ Ions, the three N atoms of the 1H-1,2,4-triazole ligand are respectively coordinated with Zn1, Zn2, and Zn3 to form a two-dimensional surface, and the two-dimensional surface is 5-nitro-1,2, The 3-trimesic acid ligand is linked into a c A frame structure with pores in the direction; free guest water mole...

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Abstract

The invention relates to MOFs (Metal-Organic Frameworks) with ph stability. The chemical formula of the MOFs is {[Zn2.5(nbta)(trz)2(H2O)].3H2O}n, wherein the nbta is 5-nitro-1,2,3-benzene tricarboxylic acid radical ions, and trz is 1H-1,2,4-triazole; the preparation method comprises the following steps: adding zinc nitrate, the 5-nitro-1,2,3-benzene tricarboxylic acid radical ions and the 1H-1,2,4-triazole into a water solution, using anhydrous sodium carbonate to regulate the PH value, reacting for 72 h at the temperature of 80 DEG C, conducting filtration and washing, and obtaining the target product; the MOFs can be used for selective adsorption separation of the CO2 / N2. The MOFs have the advantages that the preparation technology of the MOFs is simple, the operation is easy, the cost is low, the period is short, the productivity is high, the prepared MOFs have better ph stability and further have better selective adsorption separation performance on the CO2 / N2.

Description

technical field [0001] The invention relates to the technical field of metal organic framework materials, in particular to an acid-base stable metal organic framework material and its preparation method and application. Background technique [0002] Climate warming caused by greenhouse gas emissions is a serious global environmental problem facing mankind. CO 2 The gas contributes the most to warming and becomes the primary greenhouse gas to be solved. According to the forecast of the U.S. Department of Energy, reduce CO by more than 60% globally 2 emissions to curb climate change. capture and separation of CO 2 The main methods are: chemical solvent absorption method, solid absorbent adsorption method and membrane separation method. Metal-organic frameworks (MOFs), as a new type of porous material, can be used in CO 2 Storage and CO 2 / N 2 The nature of the separation aspect has received increasing attention. Metal-organic frameworks are porous crystalline materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/06B01J20/22B01J20/30B01D53/02
CPCY02C20/40Y02P20/151
Inventor 师唯张晓平程鹏
Owner NANKAI UNIV
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