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Preparation method for graphene

A technology of graphene and graphene, which is applied in the field of preparing graphene by chemical reagent reduction method, can solve the problems of cumbersome preparation process, harsh preparation process, difficulty in preparing graphene, etc., and achieve the effect of easy large-scale preparation and simple preparation process

Inactive Publication Date: 2013-05-01
郴州博太超细石墨股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for melatonin reduction, there will also be sp in the resulting graphene 3 The existence of C-N bonds (similar to the reduction of hydrazine compounds); for the reduction of tea polyphenols, plant extracts and dopamine, there is a common problem: there is a large gap between the reducing agent itself or the oxidation product of the reducing agent and graphene. Strong adsorption performance, it is not easy to prepare pure graphene; for the reduction of vitamin C and reducing sugar, it is often necessary to use a co-reductant under alkaline conditions, and the preparation process is slightly cumbersome; sodium borohydride and its substitutes, lithium hydride The reduction of aluminum requires the use of a freshly prepared high-concentration reducing agent, the preparation process is harsh, and the reducing agent is too active in water, which is also an urgent problem to be solved; using a mixed acid system for reduction requires the use of concentrated sulfuric acid and trifluoroacetic acid and other dangerous reagents are not conducive to the safe preparation of graphene
At present, there is no report on the preparation of graphene by reducing graphene oxide with food antioxidants

Method used

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Experimental program
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Embodiment 1

[0023] (1) Preparation of graphene

[0024] First prepare a graphene oxide aqueous solution with a concentration of 0.3 mg / mL and an ethanol solution of BHA and BHT with a concentration of 2.7 mg / mL (the concentration of citric acid is 1.35 mg / mL), and then mix the two, and after mixing, graphite oxide in the solution The concentrations of alkene and food antioxidants (BHA, BHT) were 0.1 mg / mL and 1.8 mg / mL, and then the mixture was reacted at 70 °C for 72 h, and the reaction product was washed with alkalized ethanol to remove unreacted Food antioxidants and their oxidation products can be dried to obtain pure graphene.

[0025] (2) Characterization of graphene oxide and graphene prepared by the present invention

[0026] In order to prove the successful preparation of graphene in the present invention, and also in order to illustrate the features such as the morphology of the prepared graphene of the present invention, a series of characterizations have been carried out to g...

Embodiment 2

[0029] Preparation of graphene

[0030] First prepare a graphene oxide aqueous solution with a concentration of 3.0 mg / mL and an ethanol solution of BHA and BHT with a concentration of 2.7 mg / mL (the concentration of citric acid is 1.35 mg / mL), and then mix the two, and after mixing, graphite oxide in the solution The concentrations of alkene and food antioxidants (BHA, BHT) were 1.0 mg / mL and 1.8 mg / mL, and then the mixture was reacted at 70 °C for 72 h, and the reaction product was washed with alkalized ethanol to remove unreacted Food antioxidants and their oxidation products can be dried to obtain pure graphene.

Embodiment 3

[0032] Preparation of graphene

[0033] First prepare a graphene oxide aqueous solution with a concentration of 6.0 mg / mL and an ethanol solution of BHA and BHT with a concentration of 2.7 mg / mL (the concentration of citric acid is 1.35 mg / mL), and then mix the two, and after mixing, graphite oxide in the solution The concentrations of alkene and food antioxidants (BHA, BHT) were 2.0 mg / mL and 1.8 mg / mL, and then the mixture was reacted at 70°C for 72 h, and the reaction product was washed with alkalized ethanol to remove unreacted Food antioxidants and their oxidation products can be dried to obtain pure graphene.

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Abstract

The invention discloses a preparation method for graphene. According to the method, the graphene is obtained by reduction and oxidization by adopting a food antioxidant. The preparation method is green, safe, mild and simple in the preparation process; and the obtained grapheme is high in quality and benefits mass preparation. The graphene prepared by the method has potential application value in aspects of separation, enriching, a composite material based on the grapheme and the like.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for preparing graphene by using a chemical reagent reduction method. Background technique [0002] Graphene is a two-dimensional substance with a hexagonal honeycomb structure composed of a single layer of carbon atoms. Since it was prepared in 2004, it has been widely used in many fields with its unique structure and excellent physical and chemical properties, such as Nano devices, nanocomposites, sensors, hydrogen storage materials, separation and enrichment, etc. However, the preparation of graphene is still an important factor limiting its further application. The preparation methods of graphene reported in the literature mainly include chemical vapor deposition, radial exfoliation of carbon nanotubes, mechanical / chemical methods of exfoliation of graphite, and epitaxial growth. Although these methods have achieved some applications in some specific fields, they a...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/186
Inventor 冯钰锜罗彦波
Owner 郴州博太超细石墨股份有限公司
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