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Preparation method of high-dispersity graphene

A high-dispersity, graphene-based technology, applied in chemical instruments and methods, dyed low-molecular-weight organic compound treatment, inorganic chemistry, etc., can solve the problem of limiting the wide application of graphene, affecting the performance of graphene's excellent properties, and reducing graphene adsorption. ability and other problems, to achieve the effect of simple and easy preparation method, excellent dispersibility, and simple operation

Inactive Publication Date: 2022-01-07
四川烯都科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The agglomeration phenomenon not only reduces the adsorption capacity of graphene itself but also affects the excellent performance of graphene itself, which limits the wide application of graphene

Method used

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  • Preparation method of high-dispersity graphene

Examples

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Effect test

Embodiment 1

[0023] A preparation method of highly dispersed graphene, comprising the following steps:

[0024] (1) Take 70 mL of 0.5 M hydrochloric acid solution, 30 mg of graphene and 47 mg (0.5 mmol) of 4-aminopyridine in a 200 mL round bottom flask, and sonicate for 30 min.

[0025] (2) Add 15 mL (0.5 mmol) sodium nitrite aqueous solution and sonicate for 30 min at 0 °C, then add some sodium hydroxide and sonicate for 1 h.

[0026] (3) Neutralize and remove excess sodium hydroxide with excess dilute hydrochloric acid, and wash with water, ethanol, and acetone in turn until the filtrate is colorless, and finally dry at room temperature to obtain the highly dispersible graphene.

Embodiment 2

[0028] A preparation method of highly dispersed graphene, comprising the following steps:

[0029] (1) Take 70 mL of 0.5 M hydrochloric acid solution, 30 mg of graphene and 188 mg (2 mmol) of 4-aminopyridine in a 200 mL round bottom flask, and sonicate for 30 min.

[0030] (2) Add 15 mL (2 mmol) sodium nitrite aqueous solution and sonicate for 30 min at 0 °C, then add some sodium hydroxide and sonicate for 1 h.

[0031] (3) Neutralize and remove excess sodium hydroxide with excess dilute hydrochloric acid, and wash with water, ethanol, and acetone in turn until the filtrate is colorless, and finally dry at room temperature to obtain the highly dispersible graphene.

Embodiment 3

[0033] A preparation method of highly dispersed graphene, comprising the following steps:

[0034] (1) Take 70 mL of 0.5 M hydrochloric acid solution, 30 mg of graphene and 376 mg (4 mmol) of 4-aminopyridine in a 200 mL round bottom flask, and sonicate for 30 min.

[0035] (2) Add 15 mL (4 mmol) sodium nitrite aqueous solution and sonicate for 30 min at 5 °C, then add some sodium hydroxide and sonicate for 1.5 h.

[0036] (3) Neutralize and remove excess sodium hydroxide with excess dilute hydrochloric acid, and wash with water, ethanol, and acetone in turn until the filtrate is colorless, and finally dry at room temperature to obtain the highly dispersible graphene.

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Abstract

The invention provides a preparation method of high-dispersity graphene. According to the technical scheme, the dispersity of graphene is improved through a micromolecule covalent modification method, the high-dispersity graphene is prepared by combining organic micromolecule 4-aminopyridine with graphene in a covalent connection mode, and the graphene has the characteristics of high dispersity, difficulty in agglomeration and the like in an aqueous solution. According to the invention, the high-dispersity graphene prepared by the method has great application potential in multiple fields of catalysis, electrochemistry, biological medicine, solar cells and the like; and the raw materials are cheap and easy to obtain, and the preparation method is simple, economical and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of graphene material preparation, in particular to a preparation method of highly dispersed graphene. Background technique [0002] Graphene consists of a single layer of sp2 hybridized carbon atoms. It is a two-dimensional carbonaceous material with a hexagonal honeycomb crystal structure. Graphene is currently the thinnest and strongest nanomaterial. The thickness of nanosheets is 0.34 nm. Each carbon atom in graphene is connected to three adjacent carbon atoms through s bonds, and the remaining p electrons cannot form bonds. , it is likely to form p-bonds with surrounding atoms, and the bonding direction is perpendicular to the graphene plane. The structure of graphene is very stable, and its C-C bond length is only 0.142 nm. The connection between each carbon atom of graphene is very strong. When an external force acts on graphene, its internal atomic surface will be deformed and further bent to counteract exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C09C3/08C01B32/194
CPCC09C1/44C09C3/08C01B32/194C09C3/006C01P2004/03C01P2004/04C01P2002/85
Inventor 夏中均刘学涌郑代芳彭勇邱兴旭
Owner 四川烯都科技有限公司
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