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Preparation method of individually-self-supporting MIL-53 metal-organic framework membrane material

A metal-organic framework, MIL-53 technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of low cost, easy availability of raw materials and easy operation

Inactive Publication Date: 2014-08-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like molecular sieve membrane materials, most of the reported MOF films are prepared on porous substrate materials, but the thermal stability, pore structure parameters, surface flatness and surface chemical groups of substrate materials will affect the growth and penetration of crystal membranes. separation performance

Method used

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  • Preparation method of individually-self-supporting MIL-53 metal-organic framework membrane material
  • Preparation method of individually-self-supporting MIL-53 metal-organic framework membrane material
  • Preparation method of individually-self-supporting MIL-53 metal-organic framework membrane material

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Experimental program
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Effect test

Embodiment 1

[0039] The steps to prepare a uniform and continuous independent self-supporting MIL-53 film by hydrothermal method are as follows:

[0040] The first step, precursor pretreatment: take a beaker, pour 25ml of deionized water, and immerse 15mg of AAO membrane (diameter 1.2cm, pore diameter 150-200nm, pore spacing 350-400nm, pore depth 50-70μm) Wash twice in deionized water, pour out the cleaning solution; then pour 25ml of absolute ethanol (mass percentage purity 97.0%) into the beaker, continue to wash twice and take it out; then put it into a petri dish, and dry it at a drying temperature of 60°C Dry treatment for 35 minutes; remove and clean the AAO membrane for use;

[0041] The anodized aluminum (AAO) diaphragm is selected from the double-pass AAO template produced by Shanghai Shangmu Technology Co., Ltd. Please refer to the SEM photo of the electron microscope scanning of the selected double-pass AAO template figure 2 and Figure 2A shown. figure 2 It is a high-power ...

Embodiment 2

[0049] The steps to prepare a uniform and continuous independent self-supporting MIL-53 film by hydrothermal method are as follows:

[0050] The first step, precursor pretreatment: take a beaker, pour 40ml of deionized water, and immerse 15mg of AAO membrane (diameter 2.5cm, pore diameter 150-200nm, pore spacing 350-400nm, pore depth 50-70μm) Wash twice in deionized water, pour out the cleaning solution, then pour 40ml of absolute ethanol (mass percentage purity 97.0%) into the beaker, continue to wash twice and take it out, then put it into a petri dish, and dry it at a drying temperature of 70°C Dry treatment for 50 minutes; remove and clean the AAO membrane for use;

[0051] The second step is to prepare the organic ligand solution: measure 15ml deionized and pour it into a beaker, weigh 100mg of analytically pure terephthalic acid, pour it into a beaker filled with deionized water, and then place the beaker under a magnetic force On the stirrer, after stirring at a consta...

Embodiment 3

[0056] The steps to prepare a uniform and continuous independent self-supporting MIL-53 film by hydrothermal method are as follows:

[0057] The first step, precursor pretreatment: take a beaker, pour 25ml of deionized water, and immerse 15mg of AAO membrane (diameter 1.2cm, pore diameter 150-200nm, pore spacing 350-400nm, pore depth 50-70μm) Wash twice in deionized water, pour out the cleaning solution; then pour 25ml of absolute ethanol (mass percentage purity 97.0%) into the beaker, continue to wash twice and take it out; then put it into a petri dish, and dry it at a drying temperature of 60°C Dry treatment for 35 minutes; remove and clean the AAO membrane for use;

[0058] The second step is to prepare an organic ligand solution: measure 25ml deionized and pour it into a beaker, weigh 100mg of analytically pure terephthalic acid, pour it into a beaker filled with deionized water, and then place the beaker under a magnetic force On the stirrer, after stirring at a constan...

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Abstract

The invention discloses a preparation method of an individually-self-supporting MIL-53 metal-organic framework membrane material. The preparation method comprises the following steps: a precursor pretreatment, organic ligand solution preparation, film preparation through a hydrothermal reaction, and a washing and drying treatment after the film forming. Specifically, the method comprises one step of soaking a metal oxide material into a water solution of an organic ligand, during this process, the organic ligand enters the channels of the metal oxide material, and then the metal oxide carries out reactions with the organic ligand so as to obtain continuous and individually-self-supporting MOF membrane. A hydrothermal method is adopted, the preparation is simple, and the target product is obtained only through a one-step reaction. The MIL-53 membrane can be used to separate carbon dioxide gas in the aerospace field.

Description

technical field [0001] The invention belongs to the technical field of functional materials, specifically relates to a method for preparing an independent self-supporting metal organic framework membrane material, and provides a novel method for controllably preparing an independent self-supporting MIL-53 metal organic framework membrane, which makes up for The existing preparation method is complex and has technical defects such as low film forming rate. Background technique [0002] With the acceleration of the modernization process of human society, the massive consumption of fossil energy has caused the greenhouse gas CO 2 The emission of carbon dioxide is increasing day by day, and the resulting global warming has attracted strong attention from the international community, and it has become one of the most urgent major problems facing human society in the 21st century. Membrane separation technology will be the best way to capture CO from various industrial exhaust ga...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/10B01D67/00
Inventor 高秋明张云露
Owner BEIHANG UNIV
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