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Preparation method of graphene/oxidized graphene

A technology of graphene and acid graphite, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as difficult control of quality and yield, difficulty in large-scale preparation of graphene, etc., achieve important industrial application potential, obvious The effect of innovative theory and process, easy scale production

Inactive Publication Date: 2014-03-12
余泉茂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main factors restricting the research and application of graphene materials are: the difficulty of large-scale preparation of graphene and the difficulty in controlling the quality and yield during the preparation process

Method used

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  • Preparation method of graphene/oxidized graphene
  • Preparation method of graphene/oxidized graphene
  • Preparation method of graphene/oxidized graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take a certain amount of acid element graphite, treat it in the air at 1000°C for 1 hour, then in situ reduction treatment at 1000°C in the nitrogen-hydrogen mixture of 5.0% H2 for 1 hour, then add 2.0% polyethylene glycol by mass ratio and 2.0% by mass ratio Sodium dodecylbenzene sulfonate, mixed with water to form a slurry with a concentration of 80.0%, ball milled in a ball mill at 2000 rpm for 12 hours, separated by a high-speed centrifuge at 10,000 rpm, can be dispersed in an aqueous solution Good graphene. image 3 The microstructure morphology of the graphene prepared in this embodiment is shown.

Embodiment 2

[0030] Take a certain amount of acid graphite, and treat it in the air at 1000°C for 0.5 hours, then add 2.0% by mass ratio of sodium methylcellulose and 2.0% by mass ratio of sulfonated polyaniline, and make a slurry with a concentration of 80.0% with water , in a ball mill at 2000 rpm for 10 hours, and separated by a high-speed centrifuge at 9000 rpm, graphene oxide with good dispersion in aqueous solution can be obtained. Figure 4 The microstructural morphology of the graphene oxide prepared in this example is shown.

Embodiment 3

[0032] Take a certain amount of acid element graphite and treat it in nitrogen at 1200°C for 1 hour, then in situ reduction treatment at 200°C in 10.0% H2 nitrogen-hydrogen mixture for 5 hours, then add sodium hexametaphosphate with a mass ratio of 0.05% and a mass ratio of 20.0 % of perylene tetracarboxylate, mixed with water to form a slurry with a concentration of 80.0%, grind it in a stirring mill for 12 hours, and separate it by a high-speed centrifuge at 10,000 rpm to obtain a good dispersion in aqueous solution. Graphene.

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Abstract

The invention relates to a preparation method of graphene / oxidized graphene. The preparation method comprises the following steps: a, carrying out high-temperature and in-situ reduction treatments on raw material (acid graphite or treated acid graphite) to prepare oxidized graphene without reduction treatment; b, adding a dispersant and a non-chemical bond modifier; and c, mechanically peeling and then separating to obtain graphene / oxidized graphene. The preparation method of graphene / oxidized graphene has remarkable theoretical and technical innovations; the raw material is cheap and easy to obtain in a great amount; the process of the preparation method is pollution-free; the technical equipment for preparation is relatively simple and easy to operate, and the process is easy to control and can be easily put into production in a large scale; the prepared graphene / oxidized graphene has excellent performance and few defect; and the preparation cost of graphene / oxidized graphene is remarkably lowered.

Description

technical field [0001] The invention relates to a carbon nanomaterial preparation technology, in particular to a graphene / graphene oxide preparation method. Background technique [0002] Graphene is a single-layer graphite sheet with a two-dimensional ordered structure that exists alone, and graphene oxide is an oxide of graphene. Graphene has been theoretically studied for more than 60 years, but it has always been considered a hypothetical structure that cannot be stabilized alone. Voshlov succeeded in experimentally isolating graphene, which has a two-dimensional structure of single-layer carbon, from graphite, confirming that it can exist alone. [0003] Graphene and graphene oxide have excellent mechanical, thermal, electrical and optical properties, such as: the strength of graphene can reach 130 GPa, which is the highest strength material known so far; the thermal conductivity can reach 5000 W m -1 k -1 , is 3 times that of diamond; graphene carrier mobility is as ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/19C01B32/198
Inventor 余泉茂
Owner 余泉茂
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