Graphene oxide and preparation method and application thereof

A technology of graphene and graphite flakes, which is applied in the field of graphene oxide and its preparation, can solve problems affecting the application of graphene, reduce the purity of graphene, and low purity of graphene oxide, and achieve simple preparation process, high purity, and easy preparation process controllable effect

Active Publication Date: 2015-06-10
苏州暖开智能地暖科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purity of graphene oxide is low, and the purity of graphene will also be reduced after the preparation of graphene in the later stage, which will affect the further application of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Open the reactor, add 240g of concentrated nitric acid, 25g of graphite flakes, 26g of potassium permanganate to the reactor, and the temperature in the reactor is 20℃. The above components are stirred and reacted. The reaction time is 50min;

[0018] (2) Raise the temperature of the reactor to 50°C, add 460g of water, 13g of sodium hypochlorite, and 8g of hydrogen peroxide, and then perform the reaction. The reaction time is 30min;

[0019] (3) Cool, and then centrifuge the various components in the reactor at 6000 rpm for 30 min;

[0020] (4) Collect the sediment, wash it with water, and then put the above sediment in water. Carry out ultrasonic treatment, ultrasonic power is 700w, ultrasonic time is 40min, after ultrasonic, graphene oxide is prepared.

Embodiment 2

[0022] (1) Open the reactor, add 220g of concentrated nitric acid, 15g of graphite flakes, 10g of potassium permanganate to the reactor, the temperature in the reactor is 10℃, and the above components are stirred and reacted. The reaction time is 30min;

[0023] (2) Increase the temperature of the reactor to 50°C, add 410g of water, 4g of sodium hypochlorite, and 5g of hydrogen peroxide, and then perform the reaction, the reaction time is 20min;

[0024] (3) Cool, and then centrifuge the various components in the reactor at 6000 rpm for 30 min;

[0025] (4) Collect the sediment, wash it with water, and then put the above sediment in water. Carry out ultrasonic treatment, the ultrasonic power is 400w, the ultrasonic time is 40min, after ultrasonic, graphene oxide is prepared.

Embodiment 3

[0027] (1) Open the reactor, add 225g of concentrated nitric acid, 18g of graphite flakes, 13g of potassium permanganate to the reactor, and a temperature of 10℃ in the reactor. The above components are stirred and reacted. The reaction time is 30min;

[0028] (2) Increase the temperature of the reactor to 50°C, add 420g of water, 11g of sodium hypochlorite, and 6g of hydrogen peroxide, and then perform the reaction, the reaction time is 30min;

[0029] (3) Cool, and then centrifuge the various components in the reactor at 6000 rpm for 30 min;

[0030] (4) Collect the sediment, wash it with water, and then put the above sediment in water. Carry out ultrasonic treatment, ultrasonic power is 500w, ultrasonic time is 40min, after ultrasonic, graphene oxide is prepared.

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PUM

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Abstract

The invention relates to graphene oxide and a preparation method and application thereof. The method for preparing the graphene oxide comprises the following steps: (1) opening a reactor, sequentially adding 220-240g of concentrated nitric acid, 15-25g of graphite scales and 10-26g of potassium permanganate into the reactor, and stirring and reacting the various components; (2) heating the reactor to the temperature of 50 DEG C, adding 410-460g of water, 4-13g of sodium hypochlorite and 5-8g of hydrogen peroxide, and reacting; (3) cooling, and centrifuging the various components in the reactor; and (4) collecting the precipitate, cleaning the precipitate by using water, and adding the precipitate into water; performing ultrasonic treatment under the conditions of the ultrasonic power of 400-700W and the ultrasonic time of 40 minutes, thereby obtaining the graphene oxide after the ultrasonic treatment. The method for preparing the graphene oxide disclosed by the invention is simple in process and controllable in process.

Description

Technical field [0001] The invention belongs to the field of new materials, and relates to graphene oxide and a preparation method and application thereof. Background technique [0002] Graphene is a carbon element composed of carbon atoms neatly arranged in a hexagonal lattice, with a very stable structure. Its perfect lattice structure is often mistaken for being stiff, but it is not the case. The connections between the individual carbon atoms of graphene are very flexible. When an external mechanical force is applied, the surface of the carbon atoms bends and deforms. In this way, the carbon atoms do not need to be rearranged to adapt to external forces, which also ensures the stability of the graphene structure, making graphene harder than diamond, and can be stretched like rubber. This stable lattice structure also enables graphene to have excellent conductivity. When the electrons in graphene move in the orbit, they will not be scattered due to lattice defects or the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 石冬喜
Owner 苏州暖开智能地暖科技有限公司
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