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Porous metal organic framework doped graphene oxide-based composite material and rapid preparation method and application thereof

An organic framework and porous metal technology, applied in chemical instruments and methods, airgel preparation, gel preparation, etc., can solve the problem of demanding reaction temperature, pressure, mechanical properties of membrane materials, preparation time, dye filtration and water passage. Quantitative performance research and other issues, to achieve the effect of low operating cost, conducive to commercial promotion, and controllable thickness

Active Publication Date: 2020-07-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both of these studies used the hydrothermal method to prepare composite membrane materials, which had strict requirements on the temperature and pressure of the reaction, and did not study the mechanical properties, preparation time, dye filtration and water flux performance of the membrane materials, and did not involve dyes. filter application

Method used

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  • Porous metal organic framework doped graphene oxide-based composite material and rapid preparation method and application thereof
  • Porous metal organic framework doped graphene oxide-based composite material and rapid preparation method and application thereof
  • Porous metal organic framework doped graphene oxide-based composite material and rapid preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0049] A porous metal-organic framework-doped graphene oxide-based composite membrane of this embodiment is prepared by the following method, and the steps are as follows:

[0050] (1) Add 0.1g of cobalt(II) acetate tetrahydrate, 0.1g of 5-(4-pyridine)-methoxyisophthalic acid, 0.1g of tetrakis(4-pyridylformaldehyde)methane, and 0.5g of polyvinylpyrrolidone Mix in 5mL N,N-dimethylformamide, stir the resulting mixture magnetically for 20 minutes, and then heat the reaction at 150°C for 30 minutes. After washing three times and drying in an oven at 80°C overnight, a purple cobalt-based porous metal-organic framework solid was obtained. The specific surface area is 298.73m 2 g -1 .

[0051] (2) The cobalt-based porous metal organic framework solid (184 mg) obtained in step (1) was dispersed in ultrapure water with a resistivity of 18.25 MΩ·cm (10 mL), and then ultrasonically treated for 30 minutes. Next, 1.0 mL of the obtained cobalt-based MOF dispersion was added to 25 mL of ...

Embodiment 2

[0058] A porous metal-organic framework-doped graphene oxide-based composite membrane of this embodiment is prepared by the following method, and the steps are as follows:

[0059] (1) 0.2g cobalt (II) acetate tetrahydrate, 0.2g 5-(4-pyridine)-methoxyisophthalic acid, 0.2g tetrakis(4-pyridyl formaldehyde)methane, 1.0g dodecyl Sodium benzenesulfonate was added to 10mL N-methylpyrrolidone and mixed, the resulting mixture was stirred magnetically for 20 minutes, then heated and reacted at 150°C for 40 minutes, after the reaction was completed, cooled to room temperature, the obtained product was centrifuged and washed with absolute ethanol After washing 5 times and drying overnight in an oven at 80°C, a purple cobalt-based metal-organic framework solid was obtained.

[0060] (2) The cobalt-based MOF solid (184 mg) obtained in step (1) was dispersed in 10 mL of N-methylpyrrolidone, and then sonicated for 30 minutes. Next, add 0.5 mL of the cobalt-based metal-organic framework dis...

Embodiment 3

[0064] A porous metal-organic framework-doped graphene oxide-based composite membrane of this embodiment is prepared by the following method, and the steps are as follows:

[0065] (1) Add 1.118g of zinc nitrate hexahydrate, 2.627g of 2-methylimidazole, and 5.590g of sodium polystyrene sulfonate into 30mL of methanol for mixing, stir the resulting mixture magnetically for 20 minutes, and then heat the reaction at 120°C After 4 hours, the reaction was cooled to room temperature, the obtained product was centrifuged and washed with methanol 7 times, and dried overnight in an oven at 70°C to obtain a white zinc-based metal organic framework solid.

[0066](2) Zn-based MOFs (184 mg) were dispersed in ultrapure water with a resistivity of 18.25 MΩ·cm (10 mL), followed by ultrasonic treatment for 30 minutes. Next, 0.5 mL of Zn-based metal-organic framework dispersion was added to 25 mL of ultrapure water dispersion of graphene oxide at a concentration of 1.5 mg / mL, the resulting mix...

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Abstract

The invention relates to a porous metal organic framework doped graphene oxide-based composite material and a rapid preparation method and application thereof. The preparation method comprises the following specific steps: sequentially adding a metal salt, an organic ligand and a surfactant into an organic solvent, stirring to react for a period of time, and centrifuging, washing and drying the product to obtain a porous metal organic framework; and respectively diluting and mixing the porous metal organic framework and graphene oxide, and obtaining the porous metal organic framework doped graphene oxide-based composite material by adopting a vacuum or pressure-assisted filtering method. Compared with the traditional vacuum / pressure auxiliary filtering method, the filtering time of the composite material is greatly shortened, the thickness is controllable, a two-dimensional film and three-dimensional hydrogel and aerogel can be prepared, the limitation that hydrogel and aerogel cannotbe prepared through the traditional filtering method is broken through, and the prepared composite film has higher water flux and stronger mechanical properties and has wide application prospects in the aspects of dye separation and water treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a graphene oxide-based composite material doped with a porous metal organic framework and its rapid preparation method and application, especially the application in dye separation and water treatment filter membranes. Background technique [0002] In recent years, graphene oxide has shown great promise in membrane development due to its unique two-dimensional structure, easily designed interlayer size, fast molecular permeability, excellent mechanical properties, and cost-effective preparation method (Adv. Mater ., 2016, 28(12): 2287-2310). As a new type of membrane application, graphene oxide material exhibits good permeability and precise separation ability, and can screen molecules and even ions (Science, 2014, 343(6172):740-742). Abraham et al reported a water flux of 7Lh for a graphene oxide membrane with a thickness of 5 μm prepared by vacuum filtr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/06B01J13/00C02F1/28C02F1/44C02F101/30
CPCB01D67/0079B01D69/12B01D71/021B01D71/06B01J13/0056B01J13/0065B01J13/0091C02F1/283C02F1/285C02F1/44C02F2101/308
Inventor 何大平王哲
Owner WUHAN UNIV OF TECH
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