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Method for inducing and preparing Co-ZIF-67 metal organic framework membrane by utilizing different-source zinc oxide layer

A metal-organic framework, co-zif-67 technology, applied in the field of preparing Co-ZIF-67 metal-organic framework films induced by different source zinc oxide layers, can solve the problems of weak bonding force between the film and the carrier surface, and achieve good preparation The effect of repeatability, good mechanical stability

Active Publication Date: 2016-08-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method not only provides the active site for Co-ZIF-67 membrane nucleation, but also solves the problem of weak binding force between the membrane and the carrier surface

Method used

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  • Method for inducing and preparing Co-ZIF-67 metal organic framework membrane by utilizing different-source zinc oxide layer
  • Method for inducing and preparing Co-ZIF-67 metal organic framework membrane by utilizing different-source zinc oxide layer
  • Method for inducing and preparing Co-ZIF-67 metal organic framework membrane by utilizing different-source zinc oxide layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Synthesis of Co-ZIF-67 film induced by zinc oxide nano-network connection layer.

[0043] (1) Carrier pretreatment:

[0044] Before synthesis, use deionized water and ethanol to ultrasonically wash several times to remove surface particles and stains; bake in a muffle furnace at 500°C for 2 hours to remove organic impurities, and place it in a desiccator after cooling down to room temperature for later use.

[0045] (2) The inner surface of the alumina ceramic tube carrier is introduced with a zinc oxide nano-network connection layer:

[0046] The molar ratio is Zn(CH 3 COO) 2 2H 2 O, CO (NH 2 ) 2 , NaCl, EDTA=1:6:0.368:0.15:180:400 is a synthetic solution, the outer wall of the ceramic tube is tightly wrapped with polytetrafluoroethylene, suspended vertically in the kettle, reacted at 90°C for 10 hours, and dried naturally. Rinse with deionized water, and the inner wall of the ceramic tube can get a zinc oxide network connection layer with a thickness ...

Embodiment 2

[0054] The experimental steps of Example 1 were repeated, except that in step (3), the synthesis temperature of Co-ZIF-67 was 80°C. attached by Figure 2a , 2b It can be seen that if the synthesis temperature of the Co-ZIF-67 film is lowered to 80°C, a continuous and dense film layer with a thickness of about 7 μm can still be formed. 俥

Embodiment 3

[0056] Repeat the experimental procedure of Example 1, the difference is that before step (3), the 2-MIm methanol solution of 0.5mol / L is used to activate the ZnO mesh layer at 50°C for 0.5h, and the attached Figure 3a , 3b It can be seen that the film is formed after activation by ligand methanol solution, and the film layer is more uniform, continuous and defect-free.

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Abstract

The invention provides a method for inducing and preparing a Co-ZIF-67 metal organic framework membrane by utilizing a different-source zinc oxide layer. Firstly, the zinc oxide layer different from Co-ZIF-67 in source pre-grows on a porous ceramic carrier, then Zn2+ on the carrier is firstly matched with an organic ligand in a solution and then is connected with Co2 in the Co-ZIF-67 synthesis solution, and a Co-ZIF-67 continuous membrane with metal ions different from metal irons of zinc oxide is induced and prepared. The zinc oxide layer provides growth active sites and connecting points of the Co-ZIF-67 membrane, and the obtained Co-ZIF-67 membrane is continuous and complete, has good preparation repeatability, stability, and a gas screening function and is superior to a Co-ZIF-The 67 membrane prepared by adopting a conventional seeding method and an in-situ method. By the adoption of the method, the problems of difficult nucleation growth and poor stability of the metal organic framework Co-ZIF-67 membrane are solved, and a new thought and method is provided for Co-ZIF-67 membrane preparation.

Description

technical field [0001] The invention provides a method for preparing Co-ZIF-67 metal-organic framework membranes by using zinc oxide coatings from different metal sources to induce the preparation of Co-ZIF-67 metal-organic framework membranes, which solves the difficulty of heterogeneous nucleation of Co-ZIF-67 metal-organic framework membranes and the difficulty in forming continuous and complete membranes The problem of weak binding force and poor stability between the layer and the carrier provides a new idea for the preparation of Co-ZIF-67 membrane. Background technique [0002] Metal-organic framework membranes have the dual advantages of MOFs material performance and membrane structure characteristics. It is a new type of membrane material that has emerged and developed rapidly in recent years. It has good and unique performance in membrane processes such as gas separation and pervaporation. performance, has good potential application value, especially in gas membran...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D67/00
CPCB01D67/0002B01D67/0088B01D71/06
Inventor 张雄福张祥李雨佳年佩刘海鸥
Owner DALIAN UNIV OF TECH
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