Composite film material based on metal-organic framework nano-sheet and graphene oxide, preparation method thereof, and application thereof in gas separation

A metal-organic framework and gas separation technology, applied in semi-permeable membrane separation, chemical instruments and methods, separation methods, etc., can solve problems affecting selectivity, scale and yield

Active Publication Date: 2017-09-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF13 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some problems in the composition of a single material. For example, graphene oxide (GO) membranes use layer gaps and defects to permeate gas molecules, which af...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite film material based on metal-organic framework nano-sheet and graphene oxide, preparation method thereof, and application thereof in gas separation
  • Composite film material based on metal-organic framework nano-sheet and graphene oxide, preparation method thereof, and application thereof in gas separation
  • Composite film material based on metal-organic framework nano-sheet and graphene oxide, preparation method thereof, and application thereof in gas separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Prepare graphene oxide solution (solution A)

[0031] Purchase the graphene oxide (analytical pure) product of Pioneer Nano Company, take graphene oxide and deionized water to prepare 0.1g L -1 The original concentration solution of graphene oxide. Place the prepared original graphene oxide solution in an ultrasonic disperser for ultrasonic dispersion, seal it and let it stand for later use.

[0032] (2) Preparation of copper oxide nanosheet solution (solution B)

[0033] Accurately weigh copper nitrate in beaker A with an electronic balance, add deionized water and stir to accelerate dissolution to make 2mmolL -1 ; Take another beaker B and prepare 1.6mmol L with deionized water -1 For ethanolamine solution, mix equal volumes of the solutions in beakers A and B. Put the cleaned and dried magnets into the mixed solution beaker along the wall of the cup, and cover with a layer of parafilm to prevent a large amount of water from evaporating. The sealed mixed solu...

Embodiment 2

[0042] Steps (1) to (3) are the same as in Example 1.

[0043] (4) Preparation of two-dimensional composite membranes by layer-by-layer method

[0044] The installation and leak testing of the suction filtration device are the same as in Example 1. Add 5mL of solutions A and B sequentially to the suction filtration device to complete 3 cycles. After completing the last cycle and waiting for complete draining, continue to add another layer of 5mL solution A to cap, and wait for complete draining. After the initial film formation is completed, 25mL solution C needs to be added to convert the copper oxide nanosheets doped with re-oxidized graphene into HKUST-1 to obtain a composite film HKUST-1@GO-3.

[0045] (5) Characterization of membrane

[0046] It was subjected to powder X-ray diffraction pattern test, scanning electron microscope, transmission electron microscope, atomic force microscope characterization and mixed gas separation test. The gas test results are shown in T...

Embodiment 3

[0048] Steps (1) to (3) are the same as in Example 1.

[0049] (4) Preparation of two-dimensional composite membranes by layer-by-layer method

[0050] The installation and leak testing of the suction filtration device are the same as in Example 1. Add 5mL of solutions A and B sequentially to the suction filtration device to complete 4 cycles. After completing the last cycle and waiting for complete draining, continue to add another layer of 5mL solution A to cap, and wait for complete draining. After the initial film formation is completed, 25mL solution C needs to be added to convert the copper oxide nanosheets doped with re-oxidized graphene into HKUST-1 to obtain a composite film HKUST-1@GO-4.

[0051] (5) Characterization of membrane

[0052] It was subjected to powder X-ray diffraction pattern test, scanning electron microscope, transmission electron microscope, atomic force microscope characterization and mixed gas separation test. The gas test results are shown in T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Apertureaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite film material based on a metal-organic framework nano-sheet and graphene oxide, and an application thereof in gas separation, and belongs to the technical fields of film materials and separation thereof. A metal oxide nano-sheet is prepared at room temperature, the metal oxide nano-sheet and a graphene oxide dispersion are paved layer by layer to form a composite film material, wherein the graphene oxide is used as a main of a film, and is doped with the metal oxide nano-sheet; and the composite film material reacts with an organic ligand to form the metal-organic framework nano-sheet doped graphene oxide composite film material. The above strategy successfully keeps an ultrathin thickness, and introduces the metal-organic framework material having uniform tunnels into the film material, so the separation selectivity of the finally obtained composite film material is 6 times higher than that of a simple graphene oxide film, and is obviously better than a film material obtained through a direct method. A result of comparison of film materials having different layers shows that the selectivity of the film obviously increases with the increase of the cycle number, the selectivity at four cycles is an optimum value, and the selectivity at five cycles decreases.

Description

technical field [0001] The invention belongs to the technical field of membrane materials and their separation, and in particular relates to a composite membrane material based on metal organic framework nanosheets and graphene oxide and its application in gas separation. Background technique [0002] The separation and purification process of mixed substances is an important step in industrial production, which consumes a lot of energy and produces pollution. Mixed gases generally have similar physical properties and molecular sizes, so the separation process is challenging. Compared with traditional separation methods, the membrane separation process has the advantages of energy saving, high efficiency, easy operation, continuous work and small space. Membrane material is one of the cores of membrane separation process, ideal separation membrane material should have high gas permeability and selectivity at the same time. Membrane materials that are currently studied main...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D71/06B01D71/02B01D69/12B01D67/00B01D53/22
CPCB01D53/228B01D67/0079B01D69/12B01D71/021B01D71/06
Inventor 康子曦王洒洒范黎黎逄佳王荣明孙道峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap