A kind of partially hydroxylated graphene and preparation method thereof

A hydroxylation and graphene technology, applied in the field of nanomaterials, can solve problems such as difficult dispersion, complex methods, and weak interactions, and achieve the effects of improved electrical conductivity, uniform particle size, and good compatibility

Active Publication Date: 2019-09-13
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

However, there is a problem in the dispersion process of graphene. Since the complete structure of graphene is composed of benzene six-membered rings with stable bonds, it has high chemical stability, an inert surface, and weak interaction with other media. There is a strong π-π interaction between the layers, which causes the sheets to stack together and is difficult to disperse, it is difficult to disperse in a solvent, and it is even more difficult to uniformly compound with other organic or inorganic materials, which makes further research on graphene difficult. Therefore, improving the dispersion of graphene and its compatibility with various solvents and materials through the modification of functional groups has become an urgent problem to be solved in expanding the application field of graphene.
[0004] In the early days, the redox method was used to prepare graphene with some functional groups, but the method was more complicated. In the existing patent literature, there was research on the co-ball milling of graphene and strong alkali, but the graphene produced in this way had many defects. The properties of alkenes have a certain influence
It can also be treated with mixed acid, such as reducing graphene oxide with a mixture of nitric acid and sulfuric acid, which will also produce graphene with some oxygen-containing groups, but this method will release some toxic gases containing nitrogen, which is harmful to the environment

Method used

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  • A kind of partially hydroxylated graphene and preparation method thereof
  • A kind of partially hydroxylated graphene and preparation method thereof
  • A kind of partially hydroxylated graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of partially hydroxylated graphene, the steps are as follows:

[0037] Measure 30% hydrogen peroxide and 98% concentrated sulfuric acid with a volume ratio of 1:3, then slowly pour the above hydrogen peroxide into concentrated sulfuric acid in an ice-water bath environment, and continuously stir until uniform, then cool to room temperature to obtain Reaction solution; the reaction solution is added to a ball mill jar, and graphite nanosheets with a thickness of 10 to 100 nm are added thereto, wherein the mixing ratio of the graphite nanosheets and the reaction solution is to add 0.8 mg graphite nanosheets per milliliter of the reaction solution to carry out Ball milling, the ball milling speed is 100rpm, the ball milling time is 4h, and the reaction product is obtained; the reaction product is slowly poured into a large amount of deionized water for dilution, and the process is continuously stirred to speed up heat dissipation, and then neutralized t...

Embodiment 2

[0043] A preparation method of partially hydroxylated graphene, the steps are as follows:

[0044]Measure 30% hydrogen peroxide and 98% concentrated sulfuric acid with a volume ratio of 3:7, then slowly pour the above-mentioned concentrated sulfuric acid into hydrogen peroxide in an ice-water bath environment, and continuously stir until uniform, and then cool to room temperature to obtain Reaction solution; the reaction solution is added to a ball mill jar, and graphite nanosheets with a thickness of 10 to 100 nm are added thereto, wherein the mixing ratio of the graphite nanosheets and the reaction solution is to add 0.9 mg graphite nanosheets per milliliter of the reaction solution to carry out Ball milling, the ball milling speed is 150rpm, the ball milling time is 4h, and the reaction product is obtained; the reaction product is slowly poured into a large amount of deionized water for dilution, and the process is continuously stirred to speed up heat dissipation, and then ...

Embodiment 3

[0048] A preparation method of partially hydroxylated graphene, the steps are as follows:

[0049] Measure 30% hydrogen peroxide and 98% concentrated sulfuric acid with a volume ratio of 1:3, then slowly pour the above-mentioned concentrated sulfuric acid into hydrogen peroxide in an ice-water bath environment, and continuously stir until uniform, and then cool to room temperature to obtain Reaction solution; the reaction solution is added to a ball mill jar, and graphite nanosheets with a thickness of 10 to 100 nm are added thereto, wherein the mixing ratio of the graphite nanosheets and the reaction solution is to add 1.0 mg of graphite nanosheets per milliliter of the reaction solution to carry out Ball milling, the ball milling speed is 250rpm, the ball milling time is 4h, and the reaction product is obtained; the reaction product is slowly poured into a large amount of deionized water for dilution, and the process is continuously stirred to speed up heat dissipation, and t...

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Abstract

The invention discloses a preparation method of partially hydroxylated graphene. The preparation method comprises the following steps: 1) mixing 98% of concentrated sulfuric acid with 30% of hydrogen peroxide in an ice water bath, stirring uniformly and cooling to room temperature to obtain reaction liquid ; 2) adding the reaction liquid to a ball-milling tank, adding graphite nanosheets, and ball-milling for 1-10 hours to obtain a reaction product; and 3) diluting the reaction product into deionized water, neutralizing, filtering, washing, dialyzing and drying to obtain hydroxylated graphene. The preparation method is simple and easy to operate and easy to implement industrialization.

Description

technical field [0001] The invention relates to the technical field of nanometer materials. More specifically, it relates to a partially hydroxylated graphene and a preparation method thereof. Background technique [0002] Physicists Andrew Geim and Konstantin Novoselov of the University of Manchester successfully prepared graphene in 2004 by using the micromechanical exfoliation method. Since then, it has become a new star in the fields of chemistry, physics, materials, and electronics. Graphene is a new carbonaceous material with a two-dimensional honeycomb crystal structure formed by stacking a single layer of carbon atoms. Graphene also has the basic structural units of zero-dimensional fullerene, one-dimensional carbon nanotubes and three-dimensional graphite, so has many unique properties. Such as large specific surface area, excellent electrical conductivity, excellent mechanical properties, and ultra-light weight. Based on the various excellent properties of graph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/194B82Y30/00B82Y40/00
Inventor 孟秋华吴敏黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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