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Method for preparing graphene oxide by adopting water-soluble initiator

A water-soluble initiator and fossil technology, applied in the field of new material graphene preparation, can solve the problems of low graphene yield, low yield, easy to pollute the environment, etc., and achieves no strong acid and metal ion pollution, and the preparation process is environmentally friendly. Simple to use effects

Inactive Publication Date: 2018-12-07
嘉兴烯成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical vapor deposition method can obtain high-quality graphene, but the yield is low and the substrate requirements are high; oxidation intercalation can achieve mass production of graphene during reduction, but because the structure of graphene is destroyed during the oxidation process, It is difficult to obtain high-quality graphene products, and it is easy to pollute the environment; the liquid phase exfoliation method uses ultrasonic energy to dissociate graphite sheets in a suitable solvent. However, the solvent exfoliation graphene yield is very low, which limits the graphene industrial production of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of water-soluble initiator prepares graphene oxide method, comprises the steps:

[0021] Using graphite powder as a raw material, add 5 g of raw material to a three-necked flask, and add 200 mL of deionized water to the three-necked flask, and stir to make the graphite powder evenly dispersed in the deionized water;

[0022] Then, add azobisisobutyronitrile; react for 2 h under the simultaneous action of stirring and ultrasound;

[0023] Finally, the graphene was separated by centrifugation at 8000r / min.

Embodiment 2

[0025] A kind of water-soluble initiator prepares graphene oxide method, comprises the steps:

[0026] Using graphite powder as a raw material, add 5 g of raw material into a three-necked flask, and add 300 mL of N-methylpyrrolidone into the three-necked flask, and stir to make the graphite powder evenly dispersed in the N-methylpyrrolidone;

[0027] Then, add benzoyl peroxide; react for 2 h under the simultaneous action of stirring and ultrasound;

[0028] Finally, the graphene was separated by centrifugation at 8000r / min.

Embodiment 3

[0030] A kind of water-soluble initiator prepares graphene oxide method, comprises the steps:

[0031] Using graphite powder as raw material, add 10 g of raw material into a three-necked flask, and add 200 mL of N,N-dimethylformamide into the three-necked flask, and stir to make the graphite powder in N,N-dimethylformamide Evenly dispersed;

[0032] Then, add benzoyl peroxide; react for 2 h under the simultaneous action of stirring and ultrasound;

[0033] Finally, the graphene was separated by centrifugation at 8000r / min.

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PUM

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Abstract

The invention belongs to the field of graphene preparation and relates to a method for preparing graphene oxide by adopting a water-soluble initiator. The method comprises the following steps: addinggraphite powder into a three-port flask; adding a solvent and then uniformly stirring; adding an initiator, and then reacting while stirring under an ultrasonic effect; centrifuging, thereby acquiringgraphene oxide. Compared with the prior art, the preparation method for graphene, provided by the invention, prepares the graphene according to the steps of generating free radicals by decomposing the initiator, intercalating the free radicals into graphene, peeling the intercalated graphene under the ultrasonic effect and then centrifugally treating; the whole preparation process is simple in operation and high in efficiency; the preparation process is green and environment-friendly and is free from strong acid and metal ion pollutions.

Description

technical field [0001] The invention belongs to the field of preparation of new material graphene, in particular to a method for preparing graphene oxide. Background technique [0002] Graphene is a single atom thick with SP 2 The flat plate structure of bonded carbon atoms, in theory, has a perfect hexagonal network structure. It has excellent physical and chemical properties such as high electrical conductivity, high thermal conductivity, high hardness and high strength, and has broad application prospects in the fields of electronics, information, energy, materials and biomedicine. [0003] At present, the main methods in the preparation of graphene include chemical vapor deposition, oxidation intercalation and reduction, and liquid phase exfoliation. Among them, the chemical vapor deposition method can obtain high-quality graphene, but the yield is low and the substrate requirements are high; oxidation intercalation can achieve mass production of graphene during reduct...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01B32/198
CPCC01B32/19C01B32/198
Inventor 叶鹏倪华钢秦存琪王梅
Owner 嘉兴烯成新材料有限公司