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Preparation method of graphene, and graphene

A graphene and acrylate technology, applied in the field of carbon materials, can solve problems such as easy pollution of the environment, graphene surface damage, difficulty in meeting large-scale needs, etc., and achieve the effect of simple process, high unit yield, and easy industrialization

Active Publication Date: 2015-03-25
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Among these methods, the preparation efficiency of mechanical exfoliation method and epitaxial growth method is very low, and it is difficult to meet the needs of large-scale
Although the chemical vapor deposition method can obtain large-scale continuous graphene films, it is suitable for micro-nano electronic devices or transparent conductive films, but it cannot meet the large-scale needs of energy storage materials and functional composite materials.
The preparation of graphene material powder by oxidation-reduction method is relatively easy to realize, and is a common method for preparing graphene material powder, but this method uses a large amount of strong acid and oxidant in the process of preparing graphene, which seriously damages the graphene surface and is easy to It pollutes the environment, so it is not suitable for large-scale industrialized graphene preparation

Method used

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  • Preparation method of graphene, and graphene
  • Preparation method of graphene, and graphene
  • Preparation method of graphene, and graphene

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preparation example Construction

[0046] The invention provides a kind of preparation method of graphene, comprises the following steps: A) metal catalyst is mixed with carbon source, carries out adsorption, obtains the carbon source that adsorbs metal catalyst, and described carbon source comprises ion exchange resin, carbon material, One or more of biomass materials and gel materials; B) heating the reducing agent and the carbon source adsorbed with the metal catalyst in the step A) to obtain graphene.

[0047]The preparation method of graphene provided by the invention does not use strong acid, oxidant and other raw materials that seriously pollute the environment, has little environmental pollution, and is beneficial to the industrialization of graphene.

[0048] In the invention, the metal catalyst is mixed with the carbon source for adsorption to obtain the carbon source with the metal catalyst adsorbed. In the present invention, the carbon source is preferably mixed with a purification reagent for purif...

Embodiment 1

[0094] Take 100g of styrene-diethylene polyresin and crush it through a 200-mesh sieve, add it to a KOH solution with a mass fraction of 5%, stir and impregnate for 12 hours, filter and dry; add the dried ion-exchange resin to 1L of 0.05mol / L In the potassium ferricyanide solution, stir evenly, let stand for 6 hours, filter and dry; add the resin that adsorbs the metal ion catalyst into the solution containing 400g KOH, let stand for 6 hours, dry and pulverize; then mix the pulverized product with 5g aluminum powder Evenly, put it in a tube furnace, in an argon atmosphere, raise the temperature to 850°C at a heating rate of 4°C / min, keep it for 2 hours, take it out after naturally cooling down, pickle, filter, and dry in sequence to obtain graphene. The specific yield is 35%.

[0095] The present invention has carried out scanning electron microscope (SEM) test to the graphene that the present embodiment obtains, and the result is as follows figure 1 shown. figure 1 It is th...

Embodiment 2

[0097] Take 100g of activated carbon and crush it through a 200-mesh sieve, put it into 10% ozone gas for 12 hours and take it out; add it to 1L of 0.05mol / L nickel acetate solution, stir evenly, let it stand for 6 hours, filter and dry; put the activated carbon adsorbed metal ion catalyst Add it into the solution containing 400g KOH, let it stand for 6h, dry and pulverize it; then place the pulverized product in a tube furnace, in a hydrogen atmosphere, raise the temperature to 850℃ at a heating rate of 4℃ / min, and keep it for 2h, Take it out after natural cooling, pickle, filter, and dry in sequence to obtain graphene with a unit yield of 40%.

[0098] The present invention has carried out scanning electron microscope (SEM) test to the graphene that the present embodiment obtains, and the result is as follows figure 2 shown. figure 2 It is the SEM image of the graphene obtained in Example 2 of the present invention. Depend on figure 2 It can be seen that the graphene o...

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Abstract

The invention provides a preparation method of graphene. The preparation method comprises the following steps: (A) mixing a metal catalyst with a carbon source, and adsorbing to obtain the carbon source adsorbing the metal catalyst, wherein the carbon source comprises one or more of ion exchange resin, a carbon material, a biomass material and a gel-type material; and (B) heating a reducing agent and the carbon source adsorbing the metal catalyst in the step (A) to obtain the graphene. According to the preparation method, no raw material such as strong acid or an oxidant which can severely pollute the environment is adopted, and the graphene is obtained by in-situ catalytically carbonizing the carbon source by one step. The invention provides the graphene.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a method for preparing graphene and graphene. Background technique [0002] Graphene is a single-layer sheet structure composed of carbon atoms and a two-dimensional material with a thickness of only one carbon atom. Graphene has shown excellent performance in many aspects. For example, graphene is almost completely transparent, absorbing only 2.3% of light, and its light transmission is very good; the thermal conductivity of graphene is as high as 5300W / m K, which is higher than Carbon nanotubes and diamonds; the electron mobility of graphene at room temperature exceeds 15,000 cm 2 / V s, which is higher than that of carbon nanotubes and silicon crystals; the resistivity of graphene is only 10 -6 Ω·cm, lower than copper or silver, is currently the material with the smallest resistivity; in addition, graphene is also the thinnest but hardest material. The preparation o...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 周旭峰刘兆平姜萍郑超王国华沈鲁恺吕彬彬
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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