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Hydroxylated graphene as well as preparation method and application thereof

A technology of hydroxylated graphene and graphene, applied in the field of nanomaterials, can solve the problems of hydroxylated graphene containing impurity functional groups, difficult separation and unenvironmental protection, long reaction time, etc. simple method effect

Pending Publication Date: 2020-11-06
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of hydroxylated graphene, which solves the defects of the existing preparation method of hydroxylated graphene such as complex operation, long reaction time, difficult separation and environmental protection, and solves the existing The hydroxylated graphene prepared by the preparation method contains impurity functional groups, and the hydroxyl group is distributed on the edge of the graphene sheet to cause poor water solubility.

Method used

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  • Hydroxylated graphene as well as preparation method and application thereof
  • Hydroxylated graphene as well as preparation method and application thereof
  • Hydroxylated graphene as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method for hydroxylated graphene, comprising the following steps:

[0032] S0: Weigh 10g of graphite oxide and place it in a crucible, put it into the quartz tube of the tube furnace, then pass argon gas into the quartz tube to purge for 30min, and maintain the temperature after the tube furnace is heated to 500°C. Temperature, keep the quartz tube in a high-temperature tube furnace for 5 minutes, and make graphite oxide carry out high-temperature reaction to prepare thermally reduced graphene oxide (TRGO) with a porous structure. In particular, in the whole preparation process of TRGO, it should be The quartz tube was continuously filled with argon.

[0033] Specifically, the thermally reduced graphene oxide with a porous structure prepared at high temperature has a lateral size of 2-8um, and the diameter of the nanopores on the nanosheet is 1-5nm, so the thermally reduced graphene oxide with a porous structure has a high ratio surface area.

[0034]S1:...

Embodiment 2

[0040] A preparation method for hydroxylated graphene, comprising the following steps:

[0041] S0: Weigh 10g of graphite oxide and place it in a crucible, put it into the quartz tube of the tube furnace, and then blow nitrogen into the quartz tube for 30min, and maintain the temperature after the tube furnace is heated to 800°C , keep the quartz tube in a high-temperature tube furnace for 5 minutes, and make graphite oxide react at a high temperature to produce thermally reduced graphene oxide (TRGO) with a porous structure. In particular, during the entire preparation process of TRGO, the quartz The tube was continuously filled with nitrogen.

[0042] Specifically, the thermally reduced graphene oxide with a porous structure prepared at high temperature has a lateral size of 2-8um, and the diameter of the nanopores on the nanosheet is 1-5nm, so the thermally reduced graphene oxide with a porous structure has a high ratio surface area.

[0043] S1: The heat-reduced graphene...

Embodiment 3

[0052] A preparation method for hydroxylated graphene, comprising the following steps:

[0053] S0: Weigh 10g of graphite oxide and place it in a crucible, and put it into the quartz tube of the tube furnace, then blow nitrogen into the tube for 30 minutes, and maintain the temperature after the tube furnace is heated to 1000°C , keep the quartz tube in a high-temperature tube furnace for 5 minutes, and make graphite oxide react at a high temperature to produce thermally reduced graphene oxide (TRGO) with a porous structure. In particular, during the entire preparation process of TRGO, the quartz The tube was continuously filled with nitrogen.

[0054] Specifically, the thermally reduced graphene oxide with a porous structure prepared at high temperature has a lateral size of 2-8um, and the diameter of the nanopores on the nanosheet is 1-5nm, so the thermally reduced graphene oxide with a porous structure has a high ratio surface area.

[0055] S1: The heat-reduced graphene ...

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Abstract

The invention provides a preparation method of hydroxylated graphene, which comprises the following steps: S1, mixing thermally reduced graphene oxide with a porous structure and an alkaline compoundsolid powder in a mass ratio of (1: 10)-(1: 30), and grinding; and S2, washing the ground product to be neutral, and drying to obtain the hydroxylated graphene. The embodiment of the invention provides a new technology capable of grafting a hydroxyl functional group on the surface of a graphene sheet layer. The invention discloses a preparation method of hydroxylated graphene. The preparation method is simple, short in preparation time, free of toxic reagents, environment-friendly, easy to separate, low in cost and high in yield; the prepared hydroxylated graphene does not contain other oxygen-containing functional groups, the technical problem that hydroxyl only exists on the edge of a product structure in the existing preparation process of the hydroxylated graphene is solved, the hydroxyl functional groups can be uniformly distributed on the graphene, and the internal structure of the prepared graphene is kept intact.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a hydroxylated graphene, a preparation method thereof and an application of the hydroxylated graphene. Background technique [0002] In 2004, physicists Andrew Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom separated graphene from graphite by micromechanical exfoliation. 2 Two-dimensional carbon nanomaterials composed of hybrid orbitals in a hexagonal honeycomb lattice structure are widely used in many fields due to their unique two-dimensional layered six-membered ring atom crystal structure and good physical and chemical properties. Although graphene has many excellent properties, because the complete structure of graphene is composed of six-membered benzene rings with stable bonds, it has high chemical stability, an inert surface, and weak interaction with other media, and each sheet of graphite There is a strong π-π stacking effect ...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B32/194C01B2204/28
Inventor 袁小亚杨森
Owner CHONGQING JIAOTONG UNIVERSITY
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