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Method for rapidly preparing reduced graphene and composite material thereof

A composite material and graphene technology, which is applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of uneven distribution of microwaves and insufficient reduction of graphene oxide, achieving fewer layers, large heat release, The effect of low oxygen content

Inactive Publication Date: 2018-12-28
芦露华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microwave technology is of great significance for liquid-phase organic synthesis, but for graphene-based materials, there is a problem of uneven distribution of microwaves, which leads to insufficient reduction of graphene oxide.

Method used

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Examples

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preparation example Construction

[0030] The invention provides a technical solution: a method for rapidly preparing reduced graphene and its composite material, including a preparation raw material and a preparation method, and the preparation raw material is as follows:

[0031] Graphene oxide and organic gas sources;

[0032] The detailed steps of the preparation method are as follows:

[0033] Step a. prepare graphene oxide or graphene oxide / manganese dioxide with Hummers, obtain graphene oxide or graphene oxide / manganese dioxide powder;

[0034] Step b. Mix methane with air, generate a high-speed airflow through the compressor, drive the graphene oxide or graphene oxide / manganese dioxide to form an aerosol powder through the high-speed airflow and enter the combustion chamber, and heat the powder quickly after combustion. The gas enters the collection chamber, and the powder is collected and introduced into the nitrogen-protected collection chamber to be separated from the waste gas.

[0035] In the pre...

Embodiment 1

[0039] Raw materials required in this embodiment: organic gas source adopts methane.

[0040] The first step is to prepare the graphene oxide aerosol precursor:

[0041] Get 3g of 325 mesh graphite powder, first carry out pre-oxidation treatment.

[0042] The process of pre-oxidation treatment is to put 325-mesh graphite and phosphorus pentoxide and other oxidizing agents into concentrated sulfuric acid environment for oxidation, and then obtain pre-oxidized graphite by suction filtration.

[0043] Further, pre-oxidized graphite is undergoing deep oxidation to prepare graphene oxide.

[0044] Then pre-oxidized graphite and potassium permanganate were mixed in the environment of concentrated sulfuric acid, the reaction was diluted, and finally hydrogen peroxide was added to remove unreacted manganese ions. The color of the solution changed from dark brown to waxy yellow, that is, graphene oxide was successfully prepared.

[0045] The prepared graphene oxide solution was added...

Embodiment 2

[0052] The difference between the present embodiment and the first embodiment is that: the raw material required in the present embodiment: the organic gas source adopts ammonia.

[0053] The same first step is used to prepare the graphene oxide aerosol precursor:

[0054] Get 3g of 325 mesh graphite powder, first carry out pre-oxidation treatment.

[0055] The process of pre-oxidation treatment is to put 325-mesh graphite and phosphorus pentoxide and other oxidizing agents into concentrated sulfuric acid environment for oxidation, and then obtain pre-oxidized graphite by suction filtration.

[0056] Further, the pre-oxidized graphite is subjected to deep oxidation to prepare graphene oxide.

[0057] Then pre-oxidized graphite and potassium permanganate were mixed in the environment of concentrated sulfuric acid, the reaction was diluted, and finally hydrogen peroxide was added to remove unreacted high-valent manganese ions. The color of the solution changed from dark brown t...

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Abstract

The invention discloses a method for rapidly preparing reduced graphene and a composite material thereof. The method comprises preparation raw materials and preparation methods; the preparation raw materials are as follows: graphene oxide and an organic gas source; the preparation methods comprise the following specific steps: a, preparing graphene oxide from Hummers so as to obtain composite powder of graphene oxide or graphene oxide / manganese dioxide; b, ejecting the composite powder of graphene oxide or graphene oxide / manganese dioxide into a combustion chamber through a supersonic speed combustible mixed gas to form aerosol which is rapidly combusted, and collecting, thereby obtaining the composite powder of graphene oxide or graphene oxide / manganese dioxide. According to the method, reduced graphene is prepared through intense and rapid chemical reaction heat radiation, and because of intense reactions and good deoxidation effects, the obtained reduced graphene is low in oxygen content; the intense combustion reaction has large short-time heat radiation, the graphene oxide can be rapidly swelled and cracked by gases released in the reduction process, and then the obtained reduced graphene is small in layer number, simple in method and possible in large-scale production.

Description

technical field [0001] The invention relates to the technical field of graphene production and processing, in particular to a method for rapidly preparing reduced graphene and composite materials thereof. Background technique [0002] In recent years, graphene is an emerging, thinnest carbon nanomaterial. Graphene is a two-dimensional carbon material, which is a general term for single-layer graphene, double-layer graphene, and multi-layer graphene. Graphene has a series of excellent characteristics, such as: large specific surface area, high mechanical strength, high light transmittance, etc. Carbon nanotubes are also a new type of carbon material with a one-dimensional nanoscale. [0003] The carbon atoms in the carbon nanotubes are connected with three surrounding carbon atoms, and they form a hexagonal ring with the adjacent carbon atoms, and spread out in a honeycomb shape, and roll into a cylindrical tube. When it is transformed from a thin sheet to a tube, its morp...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01G45/02H01G11/24H01G11/36H01G11/46
CPCC01B2204/22C01B2204/32C01G45/02C01B32/184H01G11/24H01G11/36H01G11/46Y02E60/13
Inventor 芦露华
Owner 芦露华
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