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A kind of digestion method of metal organic framework material

A metal-organic framework and organic ligand technology, which is applied in the field of digestion of zirconium-based metal-organic framework materials, achieves the effects of fast digestion speed, mild reaction conditions and low price

Active Publication Date: 2021-08-10
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is efficient and the reaction conditions are mild, cesium fluoride is expensive and is a highly toxic chemical, which is very dangerous during use

Method used

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  • A kind of digestion method of metal organic framework material
  • A kind of digestion method of metal organic framework material
  • A kind of digestion method of metal organic framework material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A mild metal organic framework material digestion method provided in this example includes the following steps in order:

[0040] 1) Weigh 0.6325g ammonium bicarbonate and dissolve in 8mL deionized water;

[0041] 2) Add 0.1 g of UiO-66 (a zirconium-based MOF material with terephthalic acid as a ligand) to the solution prepared in step 1);

[0042] 3) Ultrasonicate the turbid solution obtained in step 2) for 20 minutes to obtain a clear and transparent UiO-66 digested solution.

[0043] Optical photographs of UiO-66 after digestion in ammonium bicarbonate aqueous solution are shown in figure 2 a.

Embodiment 2

[0045] A mild metal organic framework material digestion method provided in this example includes the following steps in order:

[0046] 1) Weigh 1.1057g potassium carbonate and dissolve it in 8mL deionized water;

[0047] 2) Add 0.1 g of UiO-66 (a zirconium-based MOF material with terephthalic acid as a ligand) to the solution prepared in step 1);

[0048] 3) The turbid liquid obtained in step 2) was ultrasonically treated for 3 minutes to obtain a clear and transparent UiO-66 digested solution.

[0049] Optical photographs of UiO-66 after digestion in potassium carbonate aqueous solution are shown in figure 2 b.

Embodiment 3

[0051] A mild metal organic framework material digestion method provided in this example includes the following steps in order:

[0052] 1) Weigh 1.9458g of ammonium citrate and dissolve it in 8mL of deionized water;

[0053] 2) Add 0.1 g of UiO-66 (a zirconium-based MOF material with terephthalic acid as a ligand) to the solution prepared in step 1);

[0054]3) Stir the turbid solution obtained in step 2) for 2880 minutes (48 hours) to obtain a clear and transparent UiO-66 digested solution.

[0055] Optical photographs of UiO-66 after digestion in ammonium citrate aqueous solution are shown in figure 2 c.

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Abstract

The invention provides a digestion method for metal organic framework materials. The method includes the following steps: 1) dissolving the salt in deionized water to prepare a salt solution with a certain concentration; 2) adding a zirconium-based MOF material to the solution in step 1); 3) stirring at a certain temperature or ultrasonicating for a certain period of time to obtain the zirconium The clear aqueous solution after the digestion of the base MOF material; the anion of the salt is any one of carbonate, bicarbonate and citrate, and the cation of the salt is lithium ion, ammonium ion, sodium ion and potassium ion Any one, in which the anion and cation can be freely combined and matched. When the anion is carbonate, the cation cannot be lithium ion. The MOF digestion method provided by the invention has mild reaction conditions and fast digestion speed; it has universal applicability to zirconium-based MOF.

Description

technical field [0001] The invention belongs to the fields of inorganic chemistry, organic chemistry and material science, and in particular relates to a digestion method of zirconium-based metal organic framework materials based on the interaction between acid radical ions and MOF metal nodes under mild conditions. Background technique [0002] Metal organic framework (MOF) is a porous crystalline material formed by metal ions or metal oxygen clusters and organic ligands with coordination ability through coordination bonds. Due to their high specific surface area, diverse and regular pore structure, and easily regulated functional group types, MOF materials are widely used in catalysis, drug loading, gas separation and storage, energy storage and other fields. Among the many kinds of MOF materials, zirconium-based MOF materials have high thermal and chemical stability, so they are mostly used as templates for the preparation of functional materials such as metal nanoparticl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 曹余良褚君柯福生王云晓艾新平杨汉西
Owner WUHAN UNIV
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