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Modified grapheme preparation method

A technology of graphene and graphene film, which is applied in the field of graphene to achieve the effect of increased electrical conductivity, low cost, and good electrical conductivity

Active Publication Date: 2014-05-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent directly reduces graphene oxide coated with nano-metals, the nano-metals are gold, silver or platinum, and nano-metals such as copper, iron or nickel cannot be directly plated on graphene due to their strong activity

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Embodiment 1

[0034] A kind of preparation method of modified graphene, such as figure 1 shown, including the following steps:

[0035] S1. Preparation of graphene oxide:

[0036] S11. Low-temperature stage: add flake graphite and sodium nitrate washed with dilute hydrochloric acid and deionized water into concentrated sulfuric acid, mix the three evenly through ultrasonic treatment, place them in an ice bath, and then slowly add permanganate to it Potassium, the solution turns dark green;

[0037] The mass ratio of described flake graphite, sodium nitrate, concentrated sulfuric acid and potassium permanganate is 1:1:50:6;

[0038] S12. Medium temperature stage: transfer the solution obtained in step S11 into a 50°C water bath and stir for 7 hours, the solution turns brown, slowly add deionized water, then raise the temperature of the water bath to 70°C, react for 45min, and then add hydrogen peroxide to The solution turned golden yellow, and water was added after 20 minute...

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Abstract

The invention discloses a modified grapheme preparation method. Nanometer metallic oxide particles are dispersed in oxidized grapheme dispersion liquid, and then high-temperature reduction is conducted to form a grapheme film doped with the metal nanometer particles. The modified grapheme preparation method is environmentally friendly, free of pollution and low in cost. The conductivity of obtained modified grapheme is improved by more than three times. The metal nanometer particles evenly adhere to the surface of the grapheme, and the agglomeration phenomenon does not occur, so that the grapheme has good conducting performance; the modified grapheme preparation method can be applied to nanometer composite materials, Li-ion batteries and composites materials, based on grapheme, such as grapheme paper of super capacitors.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of modified graphene. Background technique [0002] Graphene can be understood as a combination of graphite (Graphite) and ene (Ene), because it has a graphite-like perfect geometric structure and the same special properties and wide applications as ene. Graphene is made of sp- 2 A single layer of two-dimensional honeycomb structure material in which hybridized carbon atoms are closely arranged, the C-C bond length is 0.142nm, and the thickness is one carbon atom thickness (0.335nm). The basic unit that constitutes fullerene (zero-dimensional), carbon nanotube (one-dimensional), and graphite (three-dimensional). In 2004, Professor Geim and Novoselov of the University of Manchester in the United Kingdom stripped graphene with a very simple method through experiments. Graphene is very different from other three-dimensional structure substances. It is a semi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 赵灵智崔朝阳唐芬玲欧阳剑张怡琼王碧霄
Owner SOUTH CHINA NORMAL UNIVERSITY
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