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Preparation method of water-soluble fluorinated graphene

A fluorinated graphene, water-soluble technology, applied in the field of materials, can solve the problems of high risk of operation, high risk, poor dispersion of fluorinated graphene, etc., and achieve the effect of simple process and low cost

Inactive Publication Date: 2016-09-28
HENAN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of method is fast and effective, the cost of raw materials is high, the requirements for reaction equipment are harsh, and the operation is dangerous.
In addition, fluorinated graphene can also be obtained by mechanical or chemical exfoliation of fluorinated graphite. Because graphene is not directly used in the raw material, the reaction cost is reduced, but because it is difficult to control the exfoliation of single-layer carbon atoms, the resulting product often has layers Larger, and the fluorinated graphite prepared by mechanical or chemical exfoliation is produced by the reaction of fluorine gas and graphite, which still has the disadvantages of high requirements for reaction equipment and high risk, and the fluorinated graphene prepared by the above two methods still has The defect of poor dispersion greatly limits its application value

Method used

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  • Preparation method of water-soluble fluorinated graphene
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  • Preparation method of water-soluble fluorinated graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a kind of preparation method of water-soluble fluorinated graphene, and concrete steps comprise:

[0031] Synthesis of graphene oxide: Weigh 2.0 g of flake graphite and 1.0 g of sodium nitrate, add them to 46 mL of concentrated sulfuric acid, slowly add 6 g of potassium permanganate in an ice-water bath, and control the temperature of the reaction solution to 15 ℃ for stirring reaction for 2 hours, then the temperature of the reaction solution was raised to 40 ℃ to react until the solution turns yellow to obtain a yellow suspension, add 92 mL of deionized water to the yellow suspension and raise the temperature to 90 ℃ for 2 hours. After the reaction was completed and cooled to room temperature, 15 mL of hydrogen peroxide solution was added to the reaction solution for centrifugation. precipitation;

[0032] The lower precipitate was washed three times with deionized water and hydrochloric acid with a mass fraction of 5%, and then t...

Embodiment 2

[0039] This embodiment provides a kind of preparation method of water-soluble fluorinated graphene, and concrete steps are roughly the same as the steps in embodiment 1, and difference is that the raw material ratio and parameter in each step are different:

[0040] In the synthesis step of graphene oxide, the temperature of the reaction solution after controlling the reaction for 2 hours is 30°C until the solution is yellow;

[0041] In the preparation step of the water-soluble fluorinated graphene, the concentration of the graphene oxide solution is 0.5 mg / mL, the mass fraction of the nitric acid in the reaction solution system is 10%, the mass fraction of the hydrofluoric acid 1%.

[0042] The water-soluble fluorinated graphene provided in this embodiment is detected by infrared, and at 1000cm -1 ~1250cm -1 The peak representing the C-F structure appeared in the range, thus indicating that the fluorination process of graphene oxide was successfully realized, thereby prepa...

Embodiment 3

[0044] This embodiment provides a kind of preparation method of water-soluble fluorinated graphene, and concrete steps are roughly the same as the steps in embodiment 1, and difference is that the raw material ratio and parameter in each step are different:

[0045] In the synthesis step of graphene oxide, 1.0 g of dried flake graphite was added to a four-necked flask filled with a mixture of 1.0 g of sodium nitrate and 30 mL of concentrated sulfuric acid, ultrasonically mixed evenly, stirred in an ice-water bath and slowly added Potassium permanganate 6.0 g, and the temperature of control reaction solution is 10 ℃ for stirring reaction for 2 hours, then the temperature of the reaction solution was raised to 35 ℃ to react until the solution turns yellow to obtain a yellow suspension, add 100 mL of deionized water to the yellow suspension and heat up to 90 ℃ for 2 hours. After the reaction was completed and cooled to room temperature, 15 mL of hydrogen peroxide solution was...

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Abstract

The invention provides a preparation method of water-soluble fluorinated graphene. The method comprises the steps of providing graphene oxide; dispersing the graphene oxide into deionized water to form a graphene oxide solution, then adding hydrofluoric acid and concentrated nitric acid into the graphene oxide solution, carrying out a reaction for 5-30 hours, and controlling the temperature of the reaction solution to be 150-200 DEG C; after the reaction, evaporating the product to dry to obtain the water-soluble fluorinated graphene. The preparation method is simple in technology and low in cost; the obtained water-soluble fluorinated graphene product has better dispersity.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing water-soluble fluorinated graphene. Background technique [0002] Graphene is a new type of two-dimensional honeycomb carbon-based nanomaterial formed by a single layer of carbon atoms densely packed through sp2 hybridization. It has superior physical and chemical properties, such as a large theoretical specific surface area (2630 m 2 / g), high thermal conductivity (5000 W / m K) and high electrical conductivity (64 mS / cm), etc., have great application value in energy storage and conversion, electronic devices, biosensing and other fields. Through the addition or substitution of fluorine on the graphene carbon atom layer, the energy band gap of graphene can be adjusted, and the chemical response characteristics of graphene can be changed, making it more applicable in the fields of semiconductor devices, field effect transistors, and biosensing. nature. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01P2002/82
Inventor 曹晓雨谢玲玲朱利敏杨新丽王聚峰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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