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Method for preparing MOF/carbon composite material under assistance of atomic layer deposition, obtained product and application

A technology of carbon composite materials and atomic layer deposition, applied in the direction of heat exchange materials, chemical instruments and methods, metal material coating technology, etc., can solve the problems of MOF particle agglomeration, keep the structure unchanged, and the preparation process is simple and easy The effect of improving the electromagnetic wave absorption performance

Active Publication Date: 2021-07-16
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing MOF / carbon composite materials assisted by atomic layer deposition and the resulting product. The present invention combines atomic layer deposition and preparation of MOF technology, the process is simple, the quantity of MOF can be accurately controlled, and it can also effectively solve the problem of The problem of MOF particle agglomeration, the obtained product has a stable structure and many active sites, and has a wide range of application values ​​in energy storage, electromagnetic wave absorption, heat conduction and other fields

Method used

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  • Method for preparing MOF/carbon composite material under assistance of atomic layer deposition, obtained product and application
  • Method for preparing MOF/carbon composite material under assistance of atomic layer deposition, obtained product and application
  • Method for preparing MOF/carbon composite material under assistance of atomic layer deposition, obtained product and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of different thickness ZIF-8 / graphene nanocomposites, the method is as follows:

[0039] 1. Graphene pretreatment

[0040]Take 20 mg of graphene with a sheet diameter of about 2 microns and a thickness of about 2 nanometers, dissolve it in a transparent vial of 15 ml of absolute ethanol, and ultrasonicate it for 15 minutes until there is no agglomeration, and use a rubber dropper to judge whether it is dispersed Evenly, a graphene dispersion is obtained.

[0041] 2. Preparation of ZnO / graphene composites with different thicknesses

[0042] Use a rubber dropper to evenly drop the graphene dispersion on the glass sheet. The thickness of the dispersion is about 2 mm. After natural drying, start the closed hot-wall reactor to deposit zinc oxide. Set the reaction temperature to 120 °C , turn on the water source, ozone, diethyl zinc source and inert gas pipeline, after setting the number of pulse cycles, run the program to deposit zinc oxide, after the growt...

Embodiment 2

[0056] 1. Carbon nanotube pretreatment

[0057] Take 20 mg of carbon nanotubes with a diameter of 3-15 and a nanotube length of 15-30 microns, and dissolve them in a transparent vial of 15 ml of absolute ethanol. The tubes are judged to be uniformly dispersed to obtain a carbon nanotube dispersion.

[0058] 2. Preparation of zinc oxide / carbon nanotube composites

[0059] Zinc oxide was deposited on the surface of carbon nanotubes according to the method in Example 1, and the deposition cycle was 50 cycles.

[0060] 3. Preparation of particle size ZIF-8 / carbon nanotube composites

[0061] Take 100 mg of ZnO / carbon nanotube composite material, disperse it in 15 mL of methanol, then drop the resulting dispersion into 15 mL of 8mol / L dimethylimidazole solution (methanol is the solvent), stir at room temperature for 2 h, and then centrifuge to obtain The product was washed 3 times with methanol, and then placed in a vacuum oven at 60 °C for 10 h to obtain a ZIF-8 / carbon nanotube...

Embodiment 3

[0063] The carbon nanotubes in Example 2 were replaced with carbon fibers to prepare a ZIF-8 / carbon fiber composite material.

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Abstract

The invention relates to a method for preparing an MOF / carbon composite material under the assistance of atomic layer deposition, an obtained product and application. The preparation method comprises the steps of preparing metal oxide / carbon composite materials with different thicknesses; and preparing the MOF / carbon composite material. The MOF / carbon composite material is prepared by taking a carbon material as a substrate and combining atomic layer deposition and an organic solution and metal matching experiment. The method is simple in process, meanwhile, the number of MOFs can be accurately controlled, the defects of MOF agglomeration and different particle sizes are effectively overcome, and the method has wide application value in the fields of energy storage, electromagnetic wave absorption, heat conduction and the like.

Description

technical field [0001] The invention relates to a method for preparing MOF / carbon composite materials assisted by atomic layer deposition, a product and an application thereof, and belongs to the technical field of nanomaterial preparation and structure regulation. Background technique [0002] At present, graphene has been widely used in commercial fields such as supercapacitors, solar cells, and heat-conducting materials due to its large specific surface area and excellent electrical and thermal conductivity. Unfavorable reasons such as poor impedance matching characteristics are usually combined with other materials to enhance its performance. [0003] As a semiconductor material, ZnO has the characteristics of large dielectric loss, and it has been reported as a promising microwave absorbing material. In recent years, metal-organic framework (MOF) has been regarded as a possible microwave absorbing material by researchers because of its high porosity and large specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08K3/04C08K7/06C23C16/40C23C16/455C09K5/14
CPCC08G83/008C08K3/04C08K3/041C08K7/06C23C16/406C23C16/407C23C16/45553C09K5/14C08K2201/011
Inventor 万耿平王桂振许雪飞周茂凡
Owner HAINAN UNIVERSITY
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