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Graphene capable of being dispersed in organic solvent and water-phase synthesis method thereof

An organic solvent and graphene technology, applied in the field of graphene and its aqueous phase synthesis, can solve the problems of excessive content and hindering the application of graphene

Inactive Publication Date: 2015-05-20
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the commonly prepared graphene sol often contains excessive reducing agents and other impurities because it cannot be further purified, which hinders the application of graphene.

Method used

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  • Graphene capable of being dispersed in organic solvent and water-phase synthesis method thereof
  • Graphene capable of being dispersed in organic solvent and water-phase synthesis method thereof
  • Graphene capable of being dispersed in organic solvent and water-phase synthesis method thereof

Examples

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preparation example Construction

[0095] Preparation of Graphene Materials Dispersible in Organic Solvents

[0096] Graphene material of the present invention can be prepared by the following method:

[0097] (1) providing a compound of formula Ia, or a dispersion containing said compound of formula Ia, said dispersion is formed by dispersing formula Ia in an organic solvent;

[0098] (2) Reducing the compound of formula Ia with a reducing agent to obtain the compound of formula I.

[0099] In another preferred example, the reducing agent is selected from the group consisting of hydrazine hydrate, methyl hydrazine, hydroiodic acid, p-toluenesulfonyl hydrazide, sodium borohydride, lithium aluminum tetrahydride, VC, arylhydrazine, aromatic Amines, or combinations thereof.

[0100]In another preferred example, the reaction time of the step (2) is 0.1-12h.

[0101] In another preferred example, the organic solvent is selected from the group consisting of aromatic hydrocarbon solvents, aliphatic hydrocarbon solv...

Embodiment 1

[0133] The preparation of embodiment 1 graphene

[0134] In the first step, add 120mL of concentrated sulfuric acid to a clean beaker, and place it in an ice-water bath to cool to 0°C, add 5g of flake graphite and 2.5g of sodium nitrate to it, stir for 5min, then add 15g of potassium permanganate in batches , control the temperature of the system not to exceed 20°C, after stirring for 2 hours, raise the temperature to 35°C and stir for 30 minutes. Continuously drop 250 mL of deionized water into the system to rapidly raise the temperature to about 98°C, and stir for 30 min. Add 500mL of deionized water and 50mL of 30% (mass concentration) hydrogen peroxide to stop the reaction, and stop after stirring for 5min. Let stand overnight, and remove the supernatant after the graphene oxide particles settle. Then filter through a 0.22-micron polytetrafluoroethylene membrane, wash with a large amount of water to remove various ions, until no white precipitate is formed by adding a sa...

Embodiment 2

[0137] The preparation of embodiment 2 graphene

[0138] The preparation method is basically the same as in Example 1, except that the brominated alkane compound used is n-octane bromide, which is fully reacted with graphene oxide to obtain C8NR, which can be obtained by hydrazine reduction to obtain C8R.

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Abstract

The invention provides a graphene capable of being dispersed in an organic solvent and a water-phase synthesis method thereof. Specifically, the invention provides a graphene material capable of being dispersed in an organic solvent, and the graphene has a structure represented by the formula I. The definitions of each group are listed in the description. The invention also provides a method for preparing the graphene in a water-phase reaction system.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular, the invention relates to a graphene dispersible in an organic solvent and an aqueous phase synthesis method thereof. Background technique [0002] Graphene, that is, single-layer graphite, is made of sp 2 A new type of carbon material with a monolayer thick two-dimensional honeycomb structure composed of hybrid carbon atoms connected to each other. Due to its special structure, graphene has many special physical properties and extraordinary electrical, thermal, optical and mechanical properties, and has great potential in electronics, structural materials, energy storage materials, catalytic materials, sensing materials, etc. Application prospect. Since its discovery in 2004, it has been a research hotspot for scientists all over the world. [0003] However, in order to realize the practical application of graphene, its macro-controllable preparation method must be solved first...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 陈庆云李维实赵刚赵福刚赵帅吴浩王炜刘超
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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