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Graphene chemical modification method

A chemical modification, graphene oxide technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of increased conductivity, limited application, loss of conductivity of graphene oxide, etc., to achieve a simple method Effect

Active Publication Date: 2013-12-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of graphite oxide, the introduction of a large number of oxygen atoms destroys the conjugated structure of the graphite layer, and the graphene oxide generated by exfoliation loses its conductivity, although the conjugated structure of the graphene oxide plane can be modified by reduction methods. repair, which significantly increases its conductivity, but also limits its application in high-conductivity materials to a certain extent

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A typical chemical modification method of hydrophilic graphene G-JM600 comprises the following steps:

[0086] Configure 1.0mg / mL graphene oxide aqueous solution, and put it in at a ratio of 13.0g per gram of graphene oxide M-600, use 1M NaOH to adjust the pH value to 11, reflux reaction at 100°C for 4 hours, after cooling to room temperature, add 1M HCl to it to adjust the pH value of the system to 3, and wash the obtained precipitate with water until neutral, that is have to M-600 surface modified graphene functional material G-JM600.

[0087] The characterization results of relevant EA, XPS, XRD, FT-IR, and Raman show that M-600 is well modified on the surface of graphene, with a surface modification degree of about 8%.

[0088] The solubility test shows that the graphene functional material G-JM600 has good hydrophilicity and can be well dispersed in water.

[0089] Table 2. EA analysis results of G-JM600.

[0090]

[0091] Comparing the EA analysis result...

Embodiment 2

[0098] A typical chemical modification method of water-soluble graphene G-JM1000 comprises the following steps:

[0099] Prepare a 1.0mg / mL graphene oxide aqueous solution, and put it in at a ratio of 22.0g per gram of graphene oxide M-1000, use 1M NaOH to adjust the pH value to 11, reflux reaction at 100°C for 6 hours, after cooling to room temperature, add 1M HCl to it to adjust the pH value of the system to 3, and wash the obtained precipitate with water until neutral, that is have to M-1000 surface modified graphene functional material G-JM1000.

[0100] The characterization results of relevant EA, XPS, XRD, FT-IR, and Raman show that M-1000 is well modified on the graphene surface, with a surface modification degree of about 8%.

[0101] The solubility test shows that the graphene functional material G-JM1000 has good water solubility.

[0102] Table 3. EA analysis results of G-JM1000.

[0103]

[0104] Comparing the EA analysis results of G-JM1000 in the table...

Embodiment 3

[0111] The chemical modification method of a typical water-soluble graphene G-JM2070 comprises the following steps:

[0112] Prepare a 1.0mg / mL graphene oxide aqueous solution, and put it in at a ratio of 44.0g per gram of graphene oxide M-2070, use 1M NaOH to adjust the pH value to 11, reflux reaction at 100°C for 8 hours, after cooling to room temperature, add 1M HCl to it to adjust the pH value of the system to 3, and wash the obtained precipitate with water until neutral, that is have to M-2070 surface modified graphene functional material G-JM2070.

[0113] The characterization results of relevant EA, XPS, XRD, FT-IR, and Raman show that M-2070 is well modified on the graphene surface, with a surface modification degree of about 8%.

[0114] The solubility test shows that the graphene functional material G-JM2070 has excellent water solubility, and can also be dissolved in various organic solvents such as THF, DMF, alcohols, and ketones.

[0115] Table 4. EA analys...

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Abstract

The invention discloses a graphene chemical modification method. The graphene chemical modification method comprises the following steps that graphene oxide and compound with primary amine radicals are mixed and are added to water or mixed solution of organic solvent and water to obtain reaction solution, and reacting is carried out under alkaline conditions to direct obtain functional graphene materials. According to the method, micromolecules and macromolecules with amino groups can be connected to graphene in a bonding mode through further chemical reactions to prepare a plurality of graphene functional materials. The method is easy, universal and efficient.

Description

technical field [0001] The invention relates to a graphene modification method, in particular to a graphene chemical modification method. Background technique [0002] Graphene is a single atomic layer carbonaceous material discovered by physicists Novoselov and Geim of the University of Manchester in 2004. Each carbon atom in its structure is sp 2 The hybrid orbitals form a hexagonal two-dimensional plane with a honeycomb lattice, showing unique physical and chemical properties (K.S.Novoselov, A.K.Geim, S.V.Morozov, D.Jiang, Y.Zhang, S.V.Dubonos, I.V.Grigorieva, A.A.Firsov, Science2004, 306, 666; A.K. Geim, K.S. Novoselov, Nat. Mater. 2007, 6, 183). Graphene is the thinnest and toughest material known to mankind so far. It is almost completely transparent and has good thermal and chemical stability. The specific surface area is an ideal medium and support carrier for the construction of new functional materials. [0003] Theoretically, a perfect graphene surface should n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/198
Inventor 冯科王静吴骊珠陈彬张丽萍佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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