Graphene oxide/metal organic frame composite film, preparation method and application thereof

A metal-organic framework and graphene technology, applied in chemical instruments and methods, separation methods, membrane technology, etc., can solve problems such as complex process, selection of layer thickness of membrane MOF, failure to fully utilize the structural characteristics of MOF, etc., to achieve improved separation Effects of performance, broad versatility, good application value and prospects

Inactive Publication Date: 2019-09-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are usually complex, and the MOF selective layer of the prepared membrane is thick, which fails to give full play to the structural characteristics of MOF.

Method used

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  • Graphene oxide/metal organic frame composite film, preparation method and application thereof
  • Graphene oxide/metal organic frame composite film, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Modification of graphene oxide / metal gel: First, stir and ultrasonically disperse 0.1g graphene oxide in 100mL methanol solvent to prepare 1mg / mL GO dispersion; then add zinc acetate, stir and disperse at 50°C to prepare 10mg / mL zinc acetate solution; finally add an ethylenediamine stabilizer equal to the molar amount of the metal salt, and continue stirring for 0.5h to obtain a metal sol. Coating the prepared graphene oxide / metal sol on the surface of PES, the coating time is 2s, and after the coating is completed, treat at 100°C for 1 hour to obtain a graphene oxide / metal gel modified substrate;

[0027] (2) Preparing the precursor solution: add 0.1mol 2-methylimidazole and 0.025mol zinc acetate into 20mL methanol at a molar ratio of 4:1, then mix and stir evenly to obtain the MOF precursor solution;

[0028] (3) Preparation of MOF composite membrane: The organic membrane modified by the composite gel is then immersed in the MOF precursor solution, and a dense MOF...

Embodiment 2

[0030] (1) Modification of graphene oxide / metal gel: First, stir and ultrasonically disperse 0.1g graphene oxide in 100mL methanol solvent to prepare 1mg / mL GO dispersion; then add copper acetate, stir and disperse at 50°C, Prepare a 10 mg / mL copper acetate solution; finally add an ethylenediamine stabilizer in an amount equal to the molar amount of the metal salt, and continue stirring for 0.5 h to obtain a metal sol. Coating the prepared graphene oxide / metal sol on the surface of PES, the coating time is 60s, after the coating is completed, treat at 100°C for 1 hour, and obtain the substrate modified by graphene oxide / metal gel;

[0031] (2) Preparing the precursor solution: add 0.1mol trimesic acid and 0.05mol copper acetate into 20mL methanol at a molar ratio of 2:1, then mix and stir evenly to obtain the MOF precursor solution;

[0032] (3) Preparation of MOF composite membrane: The organic membrane modified by the composite gel is then immersed in the MOF precursor solut...

Embodiment 3

[0034](1) Modification of graphene oxide / metal gel: First, stir and ultrasonically disperse 0.1g graphene oxide in 100mL methanol solvent to prepare 1mg / mL GO dispersion; then add copper acetate, stir and disperse at 50°C, Prepare a 10 mg / mL copper acetate solution; finally add an ethylenediamine stabilizer in an amount equal to the molar amount of the metal salt, and continue stirring for 0.5 h to obtain a metal sol. Coating the prepared graphene oxide / metal sol on the surface of PES, the coating time is 60s, after the coating is completed, treat at 100°C for 1 hour to obtain a graphene oxide / metal gel modified substrate;

[0035] (2) Prepare the precursor solution: add 0.1mol trimesic acid and 0.05mol copper acetate into 20mL ethanol at a molar ratio of 2:1, then mix and stir evenly to obtain the MOF precursor solution;

[0036] (3) Preparation of MOF composite membrane: The organic membrane modified by the composite gel is then immersed in the MOF precursor solution, and a ...

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Abstract

The invention discloses a graphene oxide / metal organic frame composite film, a preparation method and an application thereof. The method comprises the following steps: firstly, stirring and ultrasonic dispersing graphene oxide in an organic solvent A to obtain graphene oxide dispersion liquid; then adding a metal salt A into the graphene oxide dispersion liquid, adding a stabilizer, and reacting to obtain a graphene oxide / metal sol; then uniformly coating the surface of the organic substrate by the graphene oxide / metal sol to obtain the graphene oxide / metal sol modified substrate; mixing and stirring an organic ligand, a metal salt B and an organic solvent B uniformly to obtain a precursor liquid; immersing the graphene oxide / metal sol modified substrate in the precursor liquid, and obtaining the graphene oxide / metal organic framework composite film by hydrothermal reaction. The graphene oxide / metal organic frame composite membrane of the invention is uniform and compact and is applied to the separation of H2 / CO2, H2 / N2 and H2 / CH4 gases.

Description

technical field [0001] The invention relates to a graphene oxide / metal organic framework composite membrane and its preparation method and application, belonging to the technical field of functional membrane preparation and separation application. Background technique [0002] The separation process is an important operation process in industrial production. Membrane separation has the advantages of low energy consumption, simple operation, low investment, and no pollution. Metal-organic framework compounds, as a new type of porous coordination compound, are composed of metal ions or clusters and organic ligands through coordination bonds. They have good chemical and thermal stability, large specific surface area, regular The advantages of pore structure and adjustable structure have shown good application prospects in the fields of gas adsorption and storage, catalysis, separation, and sensing. Therefore, the synthesis and application of metal-organic framework membranes (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/12B01D67/00B01D53/22
CPCB01D53/228B01D67/0079B01D69/12B01D71/06B01D2257/108
Inventor 张国亮张旭李洋孟琴
Owner ZHEJIANG UNIV OF TECH
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