Method for controllably preparing three-dimensional nanometer porous graphene powder by chemical vapor deposition method

A chemical vapor deposition, porous graphene technology, applied in chemical instruments and methods, graphene, nano-carbon, etc., to achieve the effects of controllable size, controllable number of layers, and controllable specific surface area

Active Publication Date: 2019-01-25
陕西兴汉澜墨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the common core problems in the process of large-scale preparation of graphene powder by the above-mentioned chemical vapor deposition method, and to provide a method that is easy to realize large-scale and controllable preparation of high-quality three-dimensional nanoporous graphene powder

Method used

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  • Method for controllably preparing three-dimensional nanometer porous graphene powder by chemical vapor deposition method
  • Method for controllably preparing three-dimensional nanometer porous graphene powder by chemical vapor deposition method
  • Method for controllably preparing three-dimensional nanometer porous graphene powder by chemical vapor deposition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Dissolve 11g of sodium formate in 50mL of deionized water, then add it to 100g of magnesium oxide powder (500 mesh), stir and mix uniformly, the resulting mixture is dried at 100°C until the moisture content is less than 1%, and then ground to prepare Powder, make the particle size ≥500 mesh.

[0033] 2. Put the solid powder obtained in step 1 into a tube furnace, and pass in dried air at 850°C for high temperature activation treatment. The activation time is 20 minutes. After the high temperature activation treatment is completed, the solid powder is ground Milling.

[0034] 3. Place the solid powder activated at high temperature in step 2 in a tube furnace, heat it to 300°C under air isolation, and pour 10 mL of acrylic acid into the tube furnace at a rate of 1 mL / min to make the acrylic acid in the solid The surface of the powder undergoes polymerization reaction to obtain a solid powder coated with polyacrylic acid on the surface.

[0035] 4. Place the solid powder co...

Embodiment 2

[0045] 1. Dissolve 9g of sodium acetate in 50mL of deionized water, then add 100g of magnesium hydroxide (400 mesh), stir and mix uniformly, the resulting mixture is dried at 100℃ until the moisture content is less than 1%, and it is ground to make powder , Make the powder particle size ≥400 mesh.

[0046] 2. Put the solid powder obtained in step 1 into a tube furnace, and pass dried air into it at 850℃ for high-temperature activation treatment. The activation time is 25min. After the high-temperature activation treatment, the solid powder is ground. Milling.

[0047] 3. Place the solid powder activated at high temperature in step 2 in a tube furnace, heat it to 400°C under air isolation, and pass 10 mL of methyl acrylate into the tube furnace at a rate of 1 mL / min to make acrylic acid The methyl ester is polymerized on the surface of the solid powder to obtain a solid powder coated with polymethyl acrylate on the surface.

[0048] 4. Place the solid powder coated with polymethyl a...

Embodiment 3

[0051] 1. Dissolve 7g of sodium oxalate in 50mL of deionized water, then add 100g of magnesium carbonate (300 mesh), stir and mix evenly, the resulting mixture is dried at 100°C until the moisture content is less than 1%, and it is ground to make powder. Make the powder particle size ≥300 mesh.

[0052] 2. Put the solid powder obtained in step 1 into a tube furnace, and pass the dried air into it at 900°C for high-temperature activation treatment. The activation time is 35min. After the high-temperature activation treatment is completed, it will be ground. Milling.

[0053] 3. Place the solid powder activated at high temperature in step 2 in a tube furnace, heat it to 450°C under air isolation, and pass 10 mL of ethyl acrylate into the tube furnace at a rate of 1 mL / min to make acrylic acid The ethyl ester undergoes polymerization reaction on the surface of the solid powder to obtain a solid powder coated with polyethyl acrylate on the surface.

[0054] 4. Place the solid powder co...

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Abstract

The invention discloses a method for controllably preparing a three-dimensional nanometer porous graphene powder by a chemical vapor deposition method. The method comprises the following steps of treating a solid catalyst by salt, and activating at high temperature; coating the surface of the solid powder, subjected to high-temperature activating, with a polymer, leading the solid powder, coated with the polymer, into a carbon source at high temperature, performing the chemical vapor deposition, and growing graphene; pickling, filtering, and drying, so as to obtain the three-dimensional nanometer porous graphene powder. The method has the advantages that the common core problem of particle agglomeration of a solid catalyst in a large-scale preparation process of graphene powder by the chemical vapor deposition method is solved by the surface coating of the catalyst; by adjusting the amount of the carbon source, the particle size of the solid catalyst and the amount of salt, the high-quality three-dimensional nanometer porous graphene powder can be controllably prepared; the technology process is simplified, the higher requirement preparation conditions on equipment is decreased, and the large-scale controllable preparation of the three-dimensional nanometer porous graphene powder is easy to implement.

Description

Technical field [0001] The invention belongs to the technical field of graphene preparation, and specifically relates to a method for preparing three-dimensional nanoporous graphene powder controlled by a chemical vapor deposition method. Background technique [0002] Graphene is a kind of sp 2 The hybrid orbitals form a new type of carbon nanomaterial with a hexagonal honeycomb lattice. The perfect structure of graphene gives it good electrical, thermal, optical, mechanical and other properties, making it have a wide range of potential applications in the chemical industry, energy storage, electronic devices, biomedicine, aerospace and other fields. Thanks to the excellent physical and chemical properties of graphene, countries around the world are actively engaged in the development and commercial application of graphene. Compared with other countries, my country has become one of the most active countries in graphene research and application development, and the upstream and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186
CPCC01B2204/04C01B2204/32C01B32/186
Inventor 李红莉
Owner 陕西兴汉澜墨科技有限公司
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