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Metal organic frame composite material and preparation method thereof

A metal-organic framework and composite material technology, applied in the field of metal-organic framework composite materials and their preparation, can solve problems such as reducing specific surface area, and achieve the effects of uniform distribution and stable structure

Inactive Publication Date: 2014-12-03
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of binders will block the pores of MOFs to a certain extent and reduce the specific surface area.

Method used

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  • Metal organic frame composite material and preparation method thereof
  • Metal organic frame composite material and preparation method thereof
  • Metal organic frame composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of embodiment 1, ZIF-8 / polymer nanowire

[0033] (1) 400ml, 2mg / ml polymer PEG 113 - b -P4VP 67 After the nanowires were assembled in water, 0.4 ml of 1,4-dibromobutane was added for cross-linking (the degree of cross-linking was 100%), and stirred at room temperature for 2 days. After centrifugation, the solvent was switched to methanol, and the concentration of polymer nanowires was 2 mg / ml.

[0034] (2) Add 10ml polymer nanowire solution, 15ml methanol, and 25ml Zn(NO 3 )2 ·6H 2 O (250mM) methanol solution, 50ml 2-methylimidazole (250mM) methanol solution. Shake well and let stand at room temperature. After 24 hours, a white precipitate was obtained, which was collected by centrifugation, washed twice with methanol, and dried overnight in a vacuum oven to obtain 0.1025 g of a white solid. The field emission scanning electron microscopy results of the product are as follows figure 1 , XRD and nitrogen adsorption-desorption experiments such as ...

Embodiment 2

[0035] The preparation of embodiment 2, ZIF-8 / polymer nanowire

[0036] Polymer nanowire preparation process such as example 1 (1)

[0037] Add 10ml polymer nanowire solution, 15ml methanol, and then add 25ml Zn(NO 3 ) 2 · 6H 2 O (250mM) methanol solution, 25ml 2-methylimidazole (250mM) methanol solution. Shake well and let stand at room temperature. After 24 hours, a white precipitate was obtained, which was collected by centrifugation, washed twice with methanol, and dried overnight in a vacuum oven to obtain 0.1248 g of a white solid. The field emission scanning electron microscopy results of the product are as follows image 3 , the compressive strength as Figure 5 ZIF-8 / nanofiber.

Embodiment 3

[0038] Example 3, using polymer nanowires as a template, ZIF-8 grows into a ZIF-8 nanowire network along the polymer nanowires

[0039] Polymer nanowire preparation process such as example 1 (1)

[0040] Add 2ml of polymer nanowire (2mg / ml) solution, 83ml of methanol, and then add 5ml of Zn(NO 3 ) 2 ·6H 2 O (250mM) methanol solution, 10ml 2-methylimidazole (250mM) methanol solution. Shake well and let stand at room temperature. After 24 hours, a white flocculent precipitate was obtained, which was collected by centrifugation, washed twice with methanol, and dried overnight in a vacuum oven to obtain 0.0635 g of a white solid. The field emission scanning electron microscopy results of the product are as follows Figure 4 , the compressive strength as Figure 5 ZIF-8 fiber network.

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Abstract

The invention belongs to the technical field of nano composite materials and particularly relates to a metal organic frame composite material and a preparation method thereof. The preparation method comprises the steps of adding metal ions and organic ligand into polymer nanowire solution with a core-shell structure to form mixed solution; under the room temperature, crystallizing to obtain the polymer nanowire composite with the metal organic frame / core-shell structure. The composite has the geometric shape same as that of the crystal of the pure metal frame compound, the polymer nanowires penetrate through and cover the single crystal particle, and the particles are connected by the polymer nanowires. In addition, the metal organic frame nanowire network composite growing along the polymer nanowires can be obtained. Due to addition of the polymer nanowires, functional groups or particles can be introduced, and the functionality of the metal organic frame composite material is improved. The composite material has the advantages that the preparation process is simplified, the stability of macroscopic aggregates of the material is improved and the actual application of the material is facilitated.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and in particular relates to a metal organic framework composite material and a preparation method thereof. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous crystalline materials composed of metal ions and organic ligands. The pore size of most MOFs is in the micropore range (less than 2nm), so it has a large specific surface area. MOFs with different structures and functions can be obtained by choosing different metal ions and ligands. It is precisely because of the diversity of the structure and properties of this material and its unique porous crystal structure that it has a wide range of applications in the fields of gas adsorption, separation, detection and catalysis, and has become an emerging porous material. [0003] In addition to the advantages mentioned above, MOFs still have some disadvantages in practical applications, such as the ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28
Inventor 陈道勇易俊琦
Owner FUDAN UNIV
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