Preparation method of hydroxylated graphene

A technology of hydroxylated graphene and graphene, which is applied in the field of graphene, can solve the problems of non-unique functional groups and the inability to obtain high-purity hydroxylated graphene, and achieve the effect of method safety

Active Publication Date: 2017-10-20
山东金城石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the common preparation scheme of hydroxylated graphene adopts chemical method. The hydroxylated graphene prepared in this way will contain some ca...

Method used

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  • Preparation method of hydroxylated graphene
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  • Preparation method of hydroxylated graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Graphite oxide preparation, method is the same as embodiment 1.

[0033] 2) Graphene oxide is prepared, the method is the same as in Example 1, the frequency of the ultrasonic stripping device is controlled at 18000Hz, the stripping time is 1.0h, the stripping temperature is controlled at 30°C, the oxygen content of the prepared graphene oxide is 40at%, and the infrared Spectral graph such as figure 1 shown.

[0034] 3) Preparation of hydroxylated graphene

[0035] Introduce a mixed gas of helium and nitrogen at a volume ratio of 1:1 into the constant temperature chamber for 30 minutes. After the air is removed from the entire space, the temperature is raised to 300°C. After the temperature is constant, graphene oxide is introduced into the chamber. The heat treatment time is 60min, the obtained graphene. The infrared spectrum of hydroxylated graphene is as follows figure 2 As shown, the C1s peak spectrum is as follows image 3 As shown, the SEM image as Figu...

Embodiment 2

[0037] 1) Graphite oxide preparation, method is the same as embodiment 1.

[0038] 2) Graphene oxide preparation, the method is the same as in Example 1, the frequency of the ultrasonic stripping device is controlled at 10000 Hz, the stripping time is 2.0 h, the stripping temperature is controlled at 40 ° C, and the oxygen content of the prepared graphene oxide is 35 at%.

[0039] 3) Preparation of hydroxylated graphene

[0040] Put the mixed gas of argon and nitrogen at a volume ratio of 1:1 into the constant temperature cabin for 30 minutes. After the air is removed from the entire space, the temperature is raised to 300 ° C. After the temperature is constant, the graphene oxide is passed into the cabin, and the heat treatment time is 15 minutes respectively. , 30min, 45min, the obtained graphene is analyzed by IR, XPS, EDS.

Embodiment 3

[0042] 1) Graphite oxide preparation, method is the same as embodiment 1.

[0043] 2) Graphene oxide preparation, the method is the same as in Example 1, the frequency of the ultrasonic stripping device is controlled at 20000 Hz, the stripping time is 0.5h, the stripping temperature is controlled at 45° C., and the oxygen content of the prepared graphene oxide is 45 at%.

[0044] 3) Preparation of hydroxylated graphene

[0045] Inject a mixture of inert gas (argon, neon) and nitrogen in a volume ratio of 1:1 into the constant temperature chamber for 30 minutes. After the air is removed from the entire space, the temperature is raised to 250°C. After the temperature is constant, the graphene oxide is passed through In the cabin, the heat treatment time is 15min, 30min, 45min, and 60min respectively, and the obtained graphene is analyzed by IR, XPS, and EDS.

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Abstract

The invention relates to a preparation method of hydroxylated graphene. The preparation method comprises steps of oxidation, freeze drying, and constant temperature targeting bond breaking, and at last hydroxylated graphene powder is obtained. The preparation method is safe, and is friendly to the environment; operation is convenient; preparation time is short; graphite oxide containing a plurality of oxygen-containing functional groups is subjected to constant temperature targeting bond breaking based on that the bond energy of combination bonds of different functional groups with graphene is different, so that high purity hydroxylated graphene is obtained. The obtained hydroxylated graphene only contains hydroxyl functional groups, and contains no other oxygen-containing functional groups, the purity ranges from 99.0 to 99.9%; and the hydroxy content ranges from 10 to 25at%.

Description

technical field [0001] The invention belongs to the field of graphene, in particular to a preparation method of hydroxylated graphene. Background technique [0002] Graphene has a wide range of applications due to its special electrical, thermal, mechanical and optical properties, but this potential requires that graphene can be processed on a large scale, its nanostructure can be maintained, and the interface and properties are in macroscopic materials. and applications, so that graphene materials can be effectively utilized. Therefore, the chemical modification process of graphene has become an indispensable link in the application strategy planning of graphene materials, especially in terms of macroscopic materials / components. [0003] Functional modification of graphene can improve and enhance the dispersion of graphene in solvents. At present, a variety of chemical modification methods (covalent and non-covalent) have been developed, which greatly improve the processa...

Claims

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Application Information

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IPC IPC(8): C01B32/192
CPCC01P2002/80C01P2002/82C01P2004/03C01P2006/80Y02P20/54
Inventor 张志旭张敏牟应科李欣魏成飞于卫昆
Owner 山东金城石墨烯科技有限公司
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