Layer perforation of two-dimensional layer-shaped metal organic framework and application

A metal-organic framework and two-dimensional layered technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of easy formation of pinholes or cracks, difficulty in scaling up the membrane preparation process, etc., and achieve good gas Separation performance, the effect of simple layer-opening method

Active Publication Date: 2015-02-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are many technical difficulties in the synthesis of pure metal organic framework membranes. The membranes are prone to pinholes or cracks during the growth process, which makes the membrane preparation process difficult to scale up.

Method used

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  • Layer perforation of two-dimensional layer-shaped metal organic framework and application
  • Layer perforation of two-dimensional layer-shaped metal organic framework and application
  • Layer perforation of two-dimensional layer-shaped metal organic framework and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Open layer of six-membered ring two-dimensional ZIF-7 material

[0036] The pre-synthesized six-membered ring two-dimensional ZIF-7 powder was dried in a vacuum oven at 150℃ for 24h.

[0037] The layer-opening solution is configured as follows:

[0038] Open layer solution: 0.08 g six-membered two-dimensional ZIF-7, 0.2 g octadecylamine mixed with 40 ml n-hexane;

[0039] The prepared mixture was placed in a 600-watt sonicator in a water bath for 30 minutes and stirred overnight; centrifuged at a centrifugal speed of 12,000 per minute for 20 minutes; the obtained slurry was washed once with n-hexane, 60 watts of ultrasound for 15 minutes, and centrifuged at 12,000 per minute for 20 Minutes; 40 ml of n-hexane is added to the slurry, 60 watts of ultrasonic for 15 minutes, 500 per minute speed centrifugation for 20 minutes. The obtained upper liquid transmission electron microscope image shows that it is a very thin sheet material (such as figure 1 Shown). No obvious X...

Embodiment 2

[0040] Example 2 Four-membered ring two-dimensional ZIF-7 material opened

[0041] The layer-opening liquid is configured as follows:

[0042] Open layer solution: 0.005 g of four-membered ring two-dimensional ZIF-7 mixed with 3.75 ml of n-hexane;

[0043] The prepared mixture is placed in a 600-watt ultrasonic instrument for 50 minutes in a water bath; centrifuged at 500 speed per minute for 10 minutes to remove large particles; the obtained upper liquid transmission electron microscope image shows that the layer is opened to obtain a very thin sheet material (such as figure 2 Shown). No obvious X-ray diffraction can be observed, indicating that the obtained ZIF-7 sheet material is very thin.

Embodiment 3 2

[0044] Example 3 Two-dimensional covalent triazine framework material CTF-1 open layer

[0045] Open layer solution: 0.05g CTF-1 mixed with 40ml n-hexane;

[0046] The prepared mixture is placed in a 600-watt ultrasonic instrument in a water bath for 50m of ultrasound; after standing for 20 minutes, the supernatant is taken. The obtained upper liquid projection electron microscope image shows that the layer is opened to obtain extremely thin flake materials (such as image 3 Shown). No obvious X-ray diffraction can be observed, indicating that the obtained CTF-1 sheet material is very thin.

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Abstract

The invention provides layer perforation of a two-dimensional layer-shaped metal organic framework and an application. The process comprises the following steps that the two-dimensional layer-shaped metal organic framework, an inserting layer object and a layering solvent are mixed; a mixture is subjected to water-bath ultrasound; the ultrasound power is 150-600 W and the ultrasound time is 30-100 minutes; a layer perforation product is obtained by washing and centrifuging; centrifugal rotary speeds are 500 rpm and 20500 rpm; the centrifuging time is 10-30 minutes; the layer perforation product is mixed with a solution of an organic matter; agitation is carried out for 24-72 hours, the ultrasound is carried out for 60-90 minutes and the ultrasound power is 60 W; a dip coating method is used for drawing a loading membrane on a porous base membrane; and the drawing parameters are as follows: ascending and descending speeds are 100-300 mm / min, the staying time is 10-30 seconds and the drawing is carried out for one time. The layer perforation disclosed by the invention can obtain the sheet-shaped two-dimensional layer-shaped metal organic framework; a metal organic framework / organic matter hybrid membrane with a certain separation performance can be prepared; and the synthetic repeatability is good.

Description

Technical field [0001] The invention belongs to the field of layering and sheet application of a two-dimensional layered metal organic framework, and specifically relates to a layering and application of a two-dimensional layered metal organic framework. Background technique [0002] For nearly half a century, as energy shortages have intensified and people’s awareness of environmental protection has increased, traditional industries with high energy consumption and high pollution are in urgent need of large-scale technological reforms. Compared with the separation technology in traditional industry, membrane separation technology has the advantages of low energy consumption, no pollution, easy to achieve continuous separation, easy to couple with other separation processes, separation under mild conditions, easy amplification and other advantages. Food, medicine, environmental protection, metallurgy and other industrial sectors have been widely used. [0003] Metal-organic framew...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/06B01D71/02B01D67/00B01D69/00B01D53/22
Inventor 杨维慎彭媛李砚硕刘杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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