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

A metal-organic framework, two-dimensional layered technology, applied in membrane technology, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of easy formation of pinholes or cracks, difficult to enlarge the membrane preparation process, etc., to achieve good gas separation. Performance, simple effect of open-layer method

Active Publication Date: 2013-03-20
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

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 Six-membered ring two-dimensional ZIF-7 material layer opening

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

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

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

[0039] The prepared mixture was placed in a 600-watt ultrasonic instrument for ultrasonication in a water bath for 30 minutes, and stirred overnight; centrifuged at a speed of 12,000 rpm for 20 minutes; minutes; add 40 ml of n-hexane to the slurry, ultrasonicate at 60 watts for 15 minutes, and centrifuge at 500 rpm for 20 minutes. The resulting TEM image of the supernatant shows that it is a very thin sheet-like material (e.g. figure 1 shown). No obvious X-ray diffraction can be observed, indicating that the obtained ZIF-7 sheet material is very thin.

Embodiment 2

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

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

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

[0043] The prepared mixture was placed in a 600-watt ultrasonic instrument for ultrasonication in a water bath for 50 minutes; centrifuged at a speed of 500 per minute for 10 minutes to remove large particles; the transmission electron microscope image of the obtained supernatant showed that the layer was 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 layer opening

[0045] Layer opening solution: mix 0.05 g of CTF-1 with 40 ml of n-hexane;

[0046] The prepared mixture was placed in a 600-watt sonicator in a water bath and sonicated for 50 minutes; after standing for 20 minutes, the supernatant was taken. The resulting transmission electron microscope image of the supernatant shows that the delamination yields extremely thin sheet-like materials (e.g. 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 delamination and sheet application of a two-dimensional layered metal-organic framework, and in particular relates to the delamination and application of a two-dimensional layered metal-organic framework. Background technique [0002] For nearly half a century, with the aggravation of energy shortage and people's increasing awareness of environmental protection, traditional high energy consumption and high pollution industries are in urgent need of large-scale technological reforms. Membrane separation technology is widely used in chemical, Food, medicine, environmental protection, metallurgy and other industrial sectors have been more and more widely used. [0003] Metal-organic framework materials are a class of new materials developed in recent decades by the complexation of metals and organic ligands. Cage size has become a research hotspot in the field of porous materials. The earliest report of metal-organ...

Claims

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Application Information

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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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