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Graphene preparation method capable of reducing usage amount of reducing agent and suitable for rapid filtering

A graphene and reducing agent technology, which is applied in the field of graphene preparation, can solve problems such as deterioration of the operating environment, waste of reducing agents, and increased production costs

Active Publication Date: 2016-03-16
安军伟 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of such a large amount of excess reducing agent will result in the waste of reducing agent, the increase of production cost and the deterioration of the operating environment

Method used

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  • Graphene preparation method capable of reducing usage amount of reducing agent and suitable for rapid filtering
  • Graphene preparation method capable of reducing usage amount of reducing agent and suitable for rapid filtering
  • Graphene preparation method capable of reducing usage amount of reducing agent and suitable for rapid filtering

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Embodiment Construction

[0035] According to the present invention, there is provided a method for preparing graphene, comprising the steps of:

[0036] 1) Keep the aqueous solution of graphene oxide at 60-100°C for at least 30 minutes, and then cool to no higher than 20°C;

[0037] 2) adding a pH regulator to the aqueous solution of graphene oxide processed in step 1), and adjusting its pH to 6-12; and

[0038] 3) reducing the pH-adjusted aqueous solution obtained in step 2) with a reducing agent to obtain graphene.

[0039] In the method of the present invention, the aqueous solution of graphene oxide is kept at 60-100 DEG C for at least 30 minutes and then cooled to no higher than 20 DEG C for pretreatment, and then the pH is adjusted and then reduced, which can be compared with the situation without pretreatment. Greatly reduce the amount of reducing agent. In the case of no pretreatment, the dosage of the reducing agent (such as hydrazine hydrate) is usually 2-5 times the molar amount of the re...

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Abstract

The invention relates to a graphene preparation method. The method comprises the following steps: 1) maintaining an aqueous solution of graphene oxide at 60 to 100 DEG C for at least 30 min and then cooling the aqueous solution of graphene oxide to a temperature of no more than 20 DEG C; 2) adding a pH value conditioning agent into the aqueous solution of graphene oxide to adjust the pH value of the aqueous solution of graphene oxide to 6 to 12; and 3) reducing the pH value-adjusted aqueous solution obtained in the step 2) by using a reducing agent so as to obtain graphene. With the method, the usage amount of the reducing agent can be substantially reduced in preparation of graphene. Moreover, preparation of graphene oxide through a method including extra steps a) to j) enables the preparation process of graphene to be substantially shortened and the prepared graphene to have high purity.

Description

technical field [0001] The present invention relates to a method for preparing graphene with reducing the amount of reducing agent, and the method can also realize fast filtration. Background technique [0002] Since graphene was first fabricated by Andre K. Geim in 2004, as a new type of two-dimensional nanocarbon material, graphene has attracted extensive attention and in-depth research in the scientific community. Graphene is a new type of carbonaceous material with a thickness of a single layer of carbon atoms and is composed of carbon atoms arranged in a two-dimensional honeycomb lattice structure. It is considered to be the basic unit of all other dimensional carbonaceous materials. Zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional graphite. Graphene is composed of carbon atoms with sp 2 The single-atom carbon layer formed by hybridization has a very stable structure, excellent mechanical properties, peculiar electrical properties a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 安军伟宋明智
Owner 安军伟