Preparation method of organic single-layer graphene solution

A single-layer graphene, organic solution technology, applied in the field of graphene, can solve the problems of high price, inability to meet diversified industrial uses, and the aqueous solution does not have the characteristics of other organic compounds.

Inactive Publication Date: 2014-04-16
北京纳新天地科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used reducing agents include hydrazine hydrate, hydroquinone, sodium borohydride, reducing sugar, aluminum powder, etc., but both hydrazine hydrate and hydroquinone are highly toxic and harmful to humans and the environment; although ascorbic acid is a It is an efficient and environmentally friendly reducing agent, but its price is expensive, which is not conducive to large-scal...

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  • Preparation method of organic single-layer graphene solution
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  • Preparation method of organic single-layer graphene solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a monolayer graphene organic solution, carried out according to the following steps:

[0032] (1) Prepare 100ml of a solution consisting of dodecyltriphenylphosphine bromide and N-methylpyrrolidone at a ratio of 1:2, soak 1g of 400 mesh natural graphite powder into the solution at -5°C , fully stirred for 30 minutes, and under the action of a working frequency of 45 kHz and a power of 160 W, ultrasonication was performed for 50 minutes to intercalate solvent molecules into the graphite molecules to obtain expandable graphite.

[0033] (2) In an argon-protected environment, heat to 80°C and hold for 20 minutes to obtain expanded graphite.

[0034] (3) Under the action of a working frequency of 60kHZ and a power of 160W, the expanded graphite solution was ultrasonically peeled off for 50 minutes to obtain a black single-layer graphene solution.

[0035] (4) Suction filter the graphene solution, wash the filter cake twice with 2% dilute hydrochloric...

Embodiment 2

[0038] A method for preparing a monolayer graphene organic solution, carried out according to the following steps:

[0039] (1) Prepare 100ml of a solution consisting of dodecyltriphenylphosphine bromide and N-methylpyrrolidone at a ratio of 2:1, and soak 5g of 600 mesh natural graphite powder into the solution at -8°C , fully stirred for 70min, and under the action of 45kHz working frequency and 160W power, ultrasonication for 2h made solvent molecules intercalate between graphite molecules to obtain expandable graphite.

[0040] (2) Under an argon protection environment, heat to 100°C and hold for 50 minutes to obtain expanded graphite.

[0041] (3) Under the action of a working frequency of 60kHZ and a power of 160W, the expanded graphite solution was ultrasonically peeled off for 2 hours to obtain a black single-layer graphene solution.

[0042] (4) Suction filter the graphene solution, wash the filter cake with 2% dilute hydrochloric acid for 5 times, wash with deionized...

Embodiment 3

[0045] A method for preparing a monolayer graphene organic solution, carried out according to the following steps:

[0046] (1) Take 100ml of dodecyltriphenylphosphine bromide solution, soak 3g of 800 mesh natural graphite powder into the solution in the environment of -10℃, stir for 60min, under the action of working frequency 45kHz and power 160W, Ultrasound for 1 h makes solvent molecules intercalate between graphite molecules to obtain expandable graphite.

[0047] (2) Under an argon protection environment, heat to 90°C and hold for 1 hour to obtain expanded graphite.

[0048] (3) Under the action of a working frequency of 60kHZ and a power of 160W, the expanded graphite solution was ultrasonically peeled off for 90 minutes to obtain a black single-layer graphene solution.

[0049](4) Suction filter the graphene solution, wash the filter cake three times with 2% dilute hydrochloric acid, wash with deionized water until neutral, and dry in an oven at 60°C for 7 hours to ob...

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Abstract

The invention relates to a preparation method of an organic single-layer graphene solution. According to the method, graphite is soaked in an intercalator, so that solvent molecules are intercalated into interlayers of the graphite to obtain a graphite intercalation compound, namely, expandable graphite; the expandable graphite is heated quickly under protection of argon, volumes of the solvent molecules on the interlayers of the graphite expand rapidly, and expanded graphite is obtained; after the expanded graphite is obtained, an ultrasonic dispersion liquid-phase stripping method is adopted for stripping screening so as to obtain a graphene solution, and solid graphene powder is obtained after suction filtration, washing and drying; and the solid graphene is ultrasonically dispersed in an organic solution, and the organic graphene solution which is high in single layer rate and uniform in dispersion and has corrosion inhibition on a metal composite is obtained finally.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a method for preparing a single-layer graphene organic solution. [0002] Background technique [0003] Graphene, carbon atoms via sp 2 A single-layer two-dimensional crystal formed by hybridization and mutual bonding is the basic structural unit for constructing other dimensional carbon materials (zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional graphite). Due to its excellent electrical, thermal and mechanical properties, it is expected to be widely used in high-function nanoelectronic devices, transparent conductive films, composite materials, catalytic materials, energy storage materials and other fields. After the stable existence of graphene, it has received a lot of research attention. Graphene has broad application prospects in many fields such as next-generation integrated circuits, energy storage materials, flexible display materi...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/19
Inventor 王云峰李晓斐
Owner 北京纳新天地科技发展有限公司
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