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Preparation method of modified graphene

A graphene and modification technology, applied in the field of graphene preparation, can solve the problems of environmental pollution, complex process, single degree of functionalization, etc., and achieve the effect of improving the degree of functional modification and simplifying the preparation process

Active Publication Date: 2016-01-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the technology of high preparation cost, complicated process, single and low functionalization degree and s...

Method used

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  • Preparation method of modified graphene

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specific Embodiment approach 1

[0012] Specific implementation mode one: this implementation party is A kind of preparation method of modified graphene , the specific steps are as follows:

[0013] 1. Oxidation treatment of graphite: Add 0.3L~3L concentrated sulfuric acid with a mass fraction of 98% in a dry reactor, add 10g~100g of graphite powder, 0.1L~1L with a mass fraction of 65% Concentrated nitric acid, ultrasonic for 10min~60min, keep warm for 10min~100min at a temperature of 20℃~60℃, filter, and wash the obtained solid with distilled water repeatedly for 3 to 5 times. Drying at high temperature for 12h~36h to obtain graphite oxide;

[0014] 2. Preparation of benzophenone hydrazone derivatives: Add 2g to 20g of benzophenone derivatives into a round-bottomed flask, add 50mL to 1000mL of absolute ethanol and 1g to 50g of hydrazine hydrate with a mass fraction of 85% in sequence The solution is refluxed for 24h-72h at a temperature of 80°C and stirred, and then distilled under reduced pressure to add ...

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the benzophenone derivative described in step two is benzophenone, 4-phenylbenzophenone or 3,4-dimethyl base benzophenones. Others are the same as the first embodiment.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the benzophenone derivatives described in step two are 4,4'-dimethoxybenzophenone, 4,4' - Bis(dimethylamino)benzophenone or 4,4'-bis(dimethylamino)thiobenzophenone. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of modified graphene, relates to a preparation method of graphene and aims to solve the technical problems of high preparation cost, complicated process, single and low functionalization degree and serious environment pollution when graphene is prepared with an existing oxidation-reduction method. The preparation method comprises 1), oxidation treatment of graphite; 2), preparation of a benzophenone hydrazine derivative; 3), preparation of a diaryl diazomethane derivative; 4), preparation of modified graphene. According to the preparation method, a functional group is introduced to a reaction of high-activity carbine and graphite oxide, the functional modification degree is improved, the preparation process is simplified, and the preparation method is suitable for large-scale industrial production and follow-up application.

Description

Technical field [0001] The present invention involves a method of preparation of graphene. Background technique [0002] Graphene is a single -layer two -dimensional cellular lattice structure composed of carbon atoms. It has many excellent performance, such as high Yang's modulus and load migration rate, huge ratio surface area, excellent thermal guidance rateAnd light transmission, etc.Graphene materials have shown vast application prospects in the fields of catalyst carriers, flexible photoelectric components, biomass, and sensing materials.At present, the preparation methods of graphene are mainly micro -mechanical separation, extension growth method, chemical gas deposition, and graphite reduction method.Among them, graphite reduction method is the most widely used method for preparing graphene to date.As a chemical method for low -cost, as a low -cost, which can realize the mass production of graphene, it is highly valued by related scientific and technological workers.Howe...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 胡桢黄玉东黄云峰宋忱昊
Owner HARBIN INST OF TECH
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