Unlock instant, AI-driven research and patent intelligence for your innovation.

A metal-organic framework-loaded graphene microsphere and its preparation method and application

An organic framework and metal-loaded technology, applied in negative electrodes, structural parts, electrochemical generators, etc., can solve the problems of large interface resistance, uncontrollable size, uneven dispersion, etc., to ensure electrical conductivity, simple method, and improve activity The effect of surface area

Active Publication Date: 2021-11-05
NANJING TECH UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene loaded with MOFs usually still has practical problems such as uneven dispersion, easy agglomeration, large interface resistance, and uncontrollable size.
The development of simple, efficient, and energy-saving techniques to fabricate graphene materials loaded with MOFs with controllable structures still faces great challenges.

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
  • A metal-organic framework-loaded graphene microsphere and its preparation method and application
  • A metal-organic framework-loaded graphene microsphere and its preparation method and application
  • A metal-organic framework-loaded graphene microsphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Zinc nitrate powder is added to the graphene oxide aqueous solution of 5 grams per liter, so that the zinc ion concentration is 0.05 moles per liter, and ultrasonic 1 hour obtains a uniform mixed dispersion, such as figure 1 As shown, it is in the form of viscous gel;

[0040] (2) Put the mixed dispersion liquid into the atomization drying system, set the atomization temperature to be 150 degrees Celsius, and obtain the graphene oxide microspheres containing zinc ions through collection;

[0041] (3) Disperse the graphene oxide microspheres containing zinc ions in methanol, stir and add dimethylimidazole so that the molar ratio of dimethylimidazole to zinc ions is 40:1, and place it in a reaction kettle at 150 degrees Celsius as a solvent Thermally reacted for 6 hours, taken out and washed with water to obtain graphene microspheres loaded with zinc-based MOFs.

[0042] The appearance of the graphene microspheres loaded with zinc-based MOFs obtained in this example ...

Embodiment 2

[0044] (1) Add zinc nitrate powder to 1 gram per liter of graphene oxide aqueous solution, so that the concentration of zinc ions is 0.01 mole per liter, and obtain a uniform mixed dispersion for 0.5 hours by ultrasonication;

[0045] (2) Put the mixed dispersion liquid into the atomization drying system, set the atomization temperature to be 120 degrees Celsius, and obtain graphene oxide microspheres containing zinc ions through collection;

[0046] (3) disperse the graphene oxide microspheres containing zinc ions in the mixed solution (volume ratio 1:1) of methanol and water, stir and add dimethylimidazole, so that the mol ratio of dimethylimidazole and zinc ions is 8:1, placed in a reaction kettle for solvothermal reaction at 120 degrees Celsius for 2 hours, taken out and washed with water to obtain graphene microspheres loaded with zinc-based MOFs.

[0047] The appearance of the graphene microspheres loaded with zinc-based MOFs obtained in this example is gray-black powder...

Embodiment 3

[0049] (1) Zinc nitrate powder is added to the graphene oxide aqueous solution of 10 grams per liter, so that the concentration of zinc ions is 0.1 mole per liter, and ultrasonic 2 hours obtain a uniform mixed dispersion, such as figure 1 shown;

[0050] (2) Put the mixed dispersion liquid into the atomization drying system, set the atomization temperature to be 200 degrees Celsius, and obtain graphene oxide microspheres containing zinc ions through collection;

[0051] (3) Disperse the graphene oxide microspheres containing zinc ions in ethanol, stir and add dimethylimidazole so that the molar ratio of dimethylimidazole to zinc ions is 80:1, and place it in a reaction kettle at 180 degrees centigrade as a solvent Thermally reacted for 12 hours, taken out and washed with water to obtain graphene microspheres loaded with zinc-based MOFs.

[0052] The appearance of the graphene microspheres loaded with zinc-based MOFs obtained in this example is gray-black powder. Its electric...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a metal-organic framework-loaded graphene microsphere and its preparation method and application. The steps are as follows: first, the graphene oxide raw material is dissolved in water and stirred, and then a certain amount of metal salt is added to the solution and mixed evenly, and passed The effect of atomization and drying transforms it into graphene oxide microspheres containing metal ions, and then synthesizes metal-organic frameworks on graphene microspheres in situ by solvent heat through the action of ligands. The obtained composite microspheres have a rich multi-level structure, rich active sites, controllable pore structure and good conductivity, and have broad application prospects in sensing, energy storage and catalysis.

Description

technical field [0001] The invention belongs to the field of graphene composite materials, and relates to a graphene microsphere loaded with a metal organic framework, a preparation method and an application thereof. Background technique [0002] Metal-organic frameworks (MOFs) consist of metal-cation centers coordinated with organic ligands to form expandable frameworks. Their crystalline porous structure and tunable chemical composition endow MOFs with unparalleled versatility in developing functional materials. Even more attractive, MOFs can be used as precursors for the production of a variety of derivatives, including the aforementioned metal oxides and porous carbons. These derivatives can inherit the morphology, porosity, and chemical composition from their precursors to further evolve into hierarchical porous structures with highly dispersed, exposed, and stable active sites. In this case, through the purposeful selection of metal ions and organic ligands, the stru...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L87/00C08K3/04C08G83/00H01M4/60H01M4/62H01M10/0525
CPCC08G83/008C08J3/12C08J2387/00C08K3/042H01M4/602H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 黄铁骑朱纪欣
Owner NANJING TECH UNIV