Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of flexible graphene oxide/metal organic framework composite filter membrane

A metal-organic framework, composite filtration technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as no obvious improvement in filtration effect, inability to maintain stable connection between MOFs and GO, and detachment of MOFs. Achieve the effect of easy assembly into devices, improved retention performance, and excellent flexibility

Active Publication Date: 2020-08-25
TIANJIN UNIV
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor adopts the same method to prepare MOFs / GO composite membranes, according to the existing experimental data (data see appendix Figure 4-5 ), because this weak physical adsorption cannot maintain the stable connection between MOFs and GO, resulting in a large amount of MOFs falling off during the filtration process, and its filtration effect is not significantly improved compared with pure GO membranes.

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
  • Preparation method of flexible graphene oxide/metal organic framework composite filter membrane
  • Preparation method of flexible graphene oxide/metal organic framework composite filter membrane
  • Preparation method of flexible graphene oxide/metal organic framework composite filter membrane

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A method for preparing a flexible graphene oxide / metal-organic framework composite filter membrane; the specific preparation process includes the following steps:

[0035] 1) Weigh graphene oxide, zinc nitrate hexahydrate and 2-methylimidazole, add respectively in the same solvent, prepare uniform graphene oxide dispersion liquid, zinc nitrate solution and 2-methylimidazole solution, and zinc nitrate solution Add it into the graphene oxide dispersion liquid, then add the 2-methylimidazole solution, and mix evenly to obtain the precursor mixed liquid.

[0036] In step 1, the solvent can be deionized water, N,N-dimethylformamide (DMF) and its aqueous solution, methanol and its aqueous solution, etc.

[0037] In step 1, the mass ratio of graphene oxide, zinc nitrate hexahydrate and 2-methylimidazole is 1:(8-16):(9-18).

[0038] In step 1, the graphene oxide concentration range in the precursor mixed liquid is 0.2-0.5mg / mL, and the concentration of zinc nitrate (as ZnNO 3...

Embodiment 1

[0047] 1. Preparation of ZIF-8@GO / GO composite membrane

[0048] 1) Weigh graphene oxide, zinc nitrate hexahydrate and 2-methylimidazole (the mass ratio of the three is 1:8:9), and add them into deionized water respectively to prepare a uniform graphene oxide dispersion, zinc nitrate solution and 2-methylimidazole solution, adding zinc nitrate solution to the graphene oxide dispersion, then adding 2-methylimidazole solution, mixing evenly to obtain a precursor mixed solution, wherein the concentration of graphene oxide is 0.5mg / mL, zinc nitrate The concentration is 2.5mg / mL, and the concentration of 2-methylimidazole is 4.5mg / mL.

[0049] 2) Pour the precursor mixture into the reaction kettle, and heat it in an electric blast drying oven for 1 hour, set the temperature at 110°C to obtain a suspension of ZIF-8@GO composite particles, centrifuge the suspension, and wash , placed in an electric blast drying oven and dried to obtain gray-black ZIF-8@GO particles. Its SEM picture...

Embodiment 2

[0055] Preparation of ZIF-8@GO / GO Composite Membrane

[0056] 1) Weigh graphene oxide, zinc nitrate hexahydrate and 2-methylimidazole (the mass ratio of the three is 1:8:9), and add them into deionized water respectively to prepare a uniform graphene oxide dispersion, zinc nitrate solution and 2-methylimidazole solution, adding zinc nitrate solution to the graphene oxide dispersion, then adding 2-methylimidazole solution, mixing evenly to obtain a precursor mixed solution, wherein the concentration of graphene oxide is 0.2mg / mL, zinc nitrate The concentration is 1.0mg / mL, and the concentration of 2-methylimidazole is 1.8mg / mL.

[0057] 2) Pour the precursor mixture into the reaction kettle, and heat it in an electric blast drying oven for 1 hour, set the temperature at 170°C to obtain a suspension of ZIF-8@GO composite particles, centrifuge the suspension, and wash , placed in an electric blast drying oven and dried to obtain ZIF-8@GO particles.

[0058] 3) Evenly disperse g...

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
Hole sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a flexible graphene oxide / metal organic framework composite filter membrane. 2-methylimidazole zinc salt (ZIF-8) is used as a typical metal organic framework (MOFs), a hydrothermal method and a solvothermal method are used for preparing 2-methylimidazole zinc salt and graphene oxide composite particles (ZIF-8-coated GO composite particles) with chemical bonding, the composite particles and GO are subjected to cross-linking compounding, and the ZIF-8-coated GO / GO composite film with graphene oxide as a matrix and the composite particles as reinforcements is obtained. The obtained composite membrane can realize self-supporting, and can still keep complete under the bending action of a certain limit. Mesopores formed by the graphene oxide sheetlayer, micropores of the metal organic framework and macropores formed by adding the composite particles jointly endow the composite membrane with a hierarchical pore structure so that the compositemembrane has a richer pore channel structure, and the pollutant filtering performance is improved. Experimental data show that the membrane has excellent interception performance on pollutants such asPb < 2 + > and methylene blue.

Description

technical field [0001] The invention relates to a preparation method of a flexible graphene oxide / metal organic framework composite filter membrane (MOFs / GO composite membrane), which belongs to the technical field of preparation of flexible graphene oxide membrane and pollutant filtration. Background technique [0002] The development of modern industrial production has produced many pollutants that are harmful to the environment. These pollutants have posed a huge threat to the water supply of two-thirds of the world's population. Membrane separation technology is a kind of membrane material with selective permeability to separate the mixture through the energy difference on both sides of the membrane or its own selective permeability, so as to complete the separation, extraction, concentration or enrichment of different components. A separation technology based on the set has been widely used in the advanced treatment of sewage in recent years. [0003] Commonly used mem...

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): B01D67/00B01D69/12B01D71/02B01D71/06B01D71/10B01D71/16B01D71/34B01D71/36C02F1/28C02F1/44
CPCB01D71/021B01D71/06B01D69/12B01D67/0079B01D71/16B01D71/10B01D71/34B01D71/36C02F1/44C02F1/285
Inventor 苏冬李博昆赵晓迪杨智杰黎姿
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com