Method for preparing multi-shell hollow structure metal organic framework material

A metal-organic framework and hollow structure technology, which can be applied to 6/16 groups of organic compounds without C-metal bonds, organic chemistry, zinc-organic compounds, etc. Simple and easy method

Active Publication Date: 2017-12-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current methods can only synthesize polycrystalline single-layer hollow MOF materials
So far, no preparation methods for multilayer hollow MOF materials have been reported.

Method used

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  • Method for preparing multi-shell hollow structure metal organic framework material
  • Method for preparing multi-shell hollow structure metal organic framework material
  • Method for preparing multi-shell hollow structure metal organic framework material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Synthesis of Metal Organic Framework MIL-101:

[0034] Add chromium nitrate nonahydrate (0.8g) and terephthalic acid (0.22g) into 5mL deionized water respectively, after stirring and dissolving chromium nitrate nonahydrate, add it to the aqueous solution of terephthalic acid, continue stirring for about 5 minutes, and mix The solution was transferred to a 50 ml polytetrafluoroethylene-lined reaction kettle, and then placed in an oven at 180°C for hydrothermal reaction for 4 hours. The resulting green product was centrifuged and washed with N,N-dimethylformamide and Wash twice with deionized water and dry to obtain green metal-organic framework MIL-101 solid powder, the size of the obtained MIL-101 is about 180nm;

[0035] 2) Using proton solvent etching to obtain a single-layer hollow metal-organic framework MIL-101:

[0036] Disperse the above metal-organic framework MIL-101 into 20 mL of deionized water, take 5 mL of it and add it to a 50 mL polytetrafluoroethylen...

Embodiment 2

[0047] 1) Synthesis of Metal Organic Framework MIL-101:

[0048] Add chromium nitrate nonahydrate (0.4g) and terephthalic acid (0.11g) into 5mL deionized water respectively, after stirring and dissolving chromium nitrate nonahydrate, add it to the aqueous solution of terephthalic acid, continue stirring for about 5 minutes, and mix The solution was transferred to a 50 ml polytetrafluoroethylene-lined reaction kettle, and then placed in an oven at 180°C for hydrothermal reaction for 4 hours. The resulting green product was centrifuged and washed with N,N-dimethylformamide and Each was washed twice with deionized water, and after drying, a green metal-organic framework MIL-101 solid powder was obtained, and the obtained MIL-101 had a size of about 120 nm.

[0049] 2) Using proton solvent etching to obtain a single-layer hollow metal-organic framework MIL-101:

[0050] Disperse the above metal-organic framework MIL-101 into 20 mL of deionized water, take 5 mL of it and add it to...

Embodiment 3

[0057] 1) Synthesis of Metal Organic Framework MIL-101:

[0058] Add chromium nitrate nonahydrate (0.6g) and terephthalic acid (0.17g) into 5mL deionized water respectively, after stirring and dissolving chromium nitrate nonahydrate, add it to the aqueous solution of terephthalic acid, continue stirring for about 5 minutes, and mix The solution was transferred to a 50 ml polytetrafluoroethylene-lined reaction kettle, and then placed in an oven at 180°C for hydrothermal reaction for 4 hours. The resulting green product was centrifuged and washed with N,N-dimethylformamide and Each was washed twice with deionized water and dried to obtain a green metal-organic framework MIL-101 solid powder, and the size of the obtained MIL-101 was about 300 nm.

[0059] 2) Using proton solvent etching to obtain a single-layer hollow metal-organic framework MIL-101:

[0060] Disperse the above metal-organic framework MIL-101 into 20 mL of deionized water, take 5 mL of it and add it to a 50 mL p...

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Abstract

The invention discloses a method for preparing a multi-shell hollow structure metal organic framework material. The method comprises: preparing a metal organic framework material (MOF), dispersing in a protic solvent, and etching to obtain monolayer hollow MOF; epitaxially growing by using the MOF as a crystal seed to obtain MOF@MOF, dispersing in a protic solvent, and etching to obtain double-layer hollow MOF; and repeatedly performing epitaxial growth to obtain multi-shell MOF, and finally etching to obtain the multi-shell hollow structure MOF. According to the present invention, the method has advantages of simpleness, easy performing, mild condition, high safety and broad application prospect, and can obtain the multi-shell hollow MOF.

Description

technical field [0001] The invention belongs to the technical field of metal organic framework material preparation, and in particular relates to a method for preparing a multi-shell hollow structure metal organic framework material. Background technique [0002] Metal–organic frameworks (MOFs) are a class of porous materials assembled by metal ions / metal atom clusters and organic ligands. Due to its structural characteristics such as high specific surface area, adjustable pore size and window size, and easy modification of ligands, it has a wide range of applications in gas adsorption and separation, catalysis, and drug sustained release. In recent years, the method of improving the performance of MOF materials by regulating and modifying the morphology and structure of them has received great attention. Among them, hollow MOF materials composed of cavities and porous MOF shells have become a research hotspot. However, current methods can only synthesize polycrystalline s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F11/00C07F3/06
CPCC07F3/06C07F11/005
Inventor 刘军枫刘文贤孙晓明
Owner BEIJING UNIV OF CHEM TECH
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