Preparation method of thin-layer graphene oxide material

A technology of graphene and graphene microchips, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of difficult operation, long time consumption, harsh preparation conditions, etc., and achieve low cost, high yield, and reaction The effect of low temperature

Active Publication Date: 2013-06-12
苏州格瑞丰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can prepare a large amount of graphene at a relatively low cost, it is also limite

Method used

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  • Preparation method of thin-layer graphene oxide material
  • Preparation method of thin-layer graphene oxide material
  • Preparation method of thin-layer graphene oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of graphene oxide

[0035] Take 0.2g of graphene microflakes and 10mL of concentrated sulfuric acid and mix uniformly at room temperature, then slowly add 0.6g of potassium permanganate in a room temperature water bath, then stir and react at room temperature for 2h, then add 5% HCl to remove unreacted Potassium permanganate, then washed to neutral with distilled water to obtain viscous graphene oxide, numbered K-3;

[0036] (2) Preparation of graphene oxide dispersion

[0037] Use a straw to absorb 1 mL of viscous graphene oxide, add it to 10 mL of distilled water or lye (pH=9), and sonicate at 500 W for 30 min to obtain a uniform and stable dispersion.

Embodiment 2

[0039] (1) Preparation of graphene oxide

[0040] Take 0.2g of graphene microflakes and 10mL of concentrated sulfuric acid and mix uniformly at room temperature, then slowly add 0.4g of potassium permanganate in a water bath at room temperature, then stir and react at room temperature for 2h, then add 5% HCl to remove unreacted Potassium permanganate, then washed to neutral with distilled water to obtain viscous graphene oxide, numbered K-2;

[0041] (2) Preparation of graphene oxide dispersion

[0042] Use a straw to absorb 1 mL of viscous graphene oxide, add it to 10 mL of distilled water or lye (pH=9), and sonicate at 500 W for 30 min to obtain a uniform and stable dispersion.

Embodiment 3

[0044] (1) Preparation of graphene oxide

[0045] Take 0.2g of graphene microflakes and 10mL of concentrated sulfuric acid and mix uniformly at room temperature, then slowly add 0.3g of potassium permanganate in a water bath at room temperature, then stir and react at room temperature for 2h, then add 5% HCl to remove unreacted Potassium permanganate, then washed to neutral with distilled water to obtain viscous graphene oxide, numbered K-1.5;

[0046] (2) Preparation of graphene oxide dispersion

[0047] Use a straw to absorb 1 mL of viscous graphene oxide, add it to 10 mL of distilled water or lye (pH=9), and sonicate at 500 W for 30 min to obtain a uniform and stable dispersion.

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Abstract

The invention discloses a preparation method of a thin-layer graphene oxide material. As preferable one of embodiments, the preparation method of the thin-layer graphene oxide material comprises the following steps of: sufficiently mixing graphene microchip, acid solvent and oxidant uniformly for reacting under a set temperature; and washing the mixture to be neutral and untrasonically treating the mixture to obtain the thin-layer graphene oxide material. A reducing agent is added to the thin-layer graphene oxide to carry out the reducing reaction to produce the reduced thin-layer graphene oxide material. Furthermore, the obtained thin-layer graphene oxide and the reduced thin-layer graphene oxide are dispersed in a solvent to obtain thin-layer graphene oxide dispersion liquid and reduced thin-layer graphene oxide dispersion liquid. The preparation method disclosed by the invention is simple in process, simple in needed equipment, safe and simple to operate, low in cost, strong in controllability, easy to realize large-scale industrial production, and capable of expanding the different application needs of the graphene oxide.

Description

technical field [0001] The invention relates to a preparation method of a graphene material, in particular to a preparation method of a thin-layer graphene oxide material. Background technique [0002] Graphene is a new type of carbon material with a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed, and is the basic structural unit of fullerenes, carbon nanotubes, and graphite. Due to its unique mechanical, quantum and electrical properties, it has become the most active research frontier in the field of materials science. [0003] At present, the preparation methods of graphene mainly include mechanical exfoliation method, epitaxial crystal growth, chemical vapor deposition method, chemical redox method and so on. Most of the chemical redox methods use bulk graphite of different sizes as raw materials. Although this method can produce a large amount of graphene at a relatively low cost, it is also limited by unfavorable f...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/198
Inventor 刘立伟陈明亮郭玉芬李伟伟魏相飞邱胜强廖书田龚佑品龙明生
Owner 苏州格瑞丰纳米科技有限公司
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