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

Method used

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Examples

Experimental program
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Example Embodiment

[0030] The present invention provides a technical scheme: a method for rapidly preparing reduced graphene and its composite material, including preparation raw materials and preparation methods, the preparation raw materials are as follows:

[0031] Graphene oxide and organic gas source;

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

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

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

[0035] In the present invention...

Example Embodiment

[0038] Example one:

[0039] Raw material required in this embodiment: methane is used as an organic gas source.

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

[0041] Take 3g of 325 mesh graphite powder and pre-oxidize it first.

[0042] The process of pre-oxidation treatment is to oxidize 325 mesh graphite and phosphorus pentoxide and other oxidants in a concentrated sulfuric acid environment, and then suction and filter to obtain pre-oxidized graphite.

[0043] Further, the pre-oxidized graphite is deeply oxidized to prepare graphene oxide.

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

[0045] The prepared graphene oxide solution is added with 100 ml of hydrochloric a...

Example Embodiment

[0051] Embodiment two:

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

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

[0054] Take 3g of 325 mesh graphite powder and pre-oxidize it first.

[0055] The process of pre-oxidation treatment is to oxidize 325 mesh graphite and phosphorus pentoxide and other oxidants in a concentrated sulfuric acid environment, and then suction and filter to obtain pre-oxidized graphite.

[0056] Furthermore, the pre-oxidized graphite is further oxidized to produce graphene oxide.

[0057] Then the pre-oxidized graphite and potassium permanganate are mixed in a concentrated sulfuric acid environment, and the reaction is diluted. Finally, hydrogen peroxide is added to remove the unreacted high-valence manganese ions. The color of the solution changes from dark brown to waxy yellow, that is, graphene oxide i...

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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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