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Regular graphene and preparation method thereof

A graphene and regular technology, applied in the field of regular graphene and its preparation, to achieve the effect of easy operation

Inactive Publication Date: 2013-01-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to synthesize graphene with regular geometric boundaries on a large scale and in a controlled manner has never been discovered or reported.

Method used

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  • Regular graphene and preparation method thereof
  • Regular graphene and preparation method thereof
  • Regular graphene and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0026] The first step, the preparation of catalyst:

[0027] The substrate is ultrasonically cleaned with deionized water, ethanol, and acetone in sequence, and then oven-dried, and then processed by chemical vapor deposition, physical vapor deposition, vacuum thermal evaporation, magnetron sputtering, plasma-enhanced chemical vapor deposition, electrochemical method or Deposition techniques such as printing deposit a layer of metal on the substrate surface, or directly use commercial metal foils (such as gold, silver, copper, iron, cobalt, nickel, etc.) as catalysts.

[0028] The second step, the vapor deposition device such as figure 1 As shown, the substrate or metal foil deposited with metal is placed in the middle of a clean quartz tube, and the quartz tube is placed in the electric furnace so that the middle of the quartz tube is exactly in the central area of ​​the electric furnace. First use a mechanical pump to pump out the air and moisture in the quartz tube, then p...

Embodiment 1

[0033] Embodiment 1, preparation regular graphene

[0034] In the first step, a 25um thick copper foil (purity 99.8%) is ultrasonically cleaned with deionized water, ethanol and acetone, and then dried in an oven.

[0035] In the second step, the copper foil is placed in the middle of a clean quartz tube, and the quartz tube is put into an electric furnace so that the middle of the quartz tube is located in the central area of ​​the electric furnace, and then 120 sccm of argon gas is passed into the quartz tube, 5 After ~10 minutes, the argon sparging was stopped. Turn on the vacuum pump to start vacuuming. When the pressure in the reaction chamber is 3 to 10 Pa, turn off the vacuum pump, and then feed the mixed gas of 100 sccm of argon and 300 sccm of hydrogen until the pressure in the reaction chamber is consistent with the external atmospheric pressure, and then stop feeding the argon. Only use 300sccm hydrogen as the carrier gas, and start heating after 10 minutes of vent...

Embodiment 2

[0039] Embodiment 2, preparation regular graphene

[0040] The preparation method is basically the same as in Example 1, except that when the electric furnace temperature reaches 1000° C., feed 20 sccm of methane as a carbon source, and the scanning electron micrograph of its product is as follows: Figure 7 As shown, the two-dimensional hexagonal structure can still be seen from the figure, but its shape begins to deviate from the ideal equiangular hexagonal structure. This fact is general, that is, the shape of graphene shifts toward more and more irregularity as the flow rate of the carbon source increases or, equivalently, the growth rate increases.

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Abstract

The invention discloses graphene with a regular shape and a preparation method thereof. The graphene with a regular shape is prepared by the chemical vapor deposition method and comprises the following steps: placing a metal foil or a substrate with a metal catalyst in a reactor without oxygen and water to ensure that the temperature of the metal foil or the substrate reaches 800-1050 DEG C, and then introducing a carbon source in the reactor to react and obtain the graphene with a regular shape. The obtained graphene in the invention has an equiangular hexagonal structure; and the method in the invention is convenient to operate, is simple and practical and can be used in mass production.

Description

technical field [0001] The invention relates to a regular graphene and a preparation method thereof. Background technique [0002] Graphene, that is, the monoatomic layer of graphite, is a two-dimensional structure in which carbon atoms are arranged in a honeycomb shape, and is also the basic unit of other low-dimensional carbon materials such as fullerenes and carbon nanotubes. According to the number of layers, graphene can be divided into single-layer graphene, double-layer graphene, and few-layer graphene. Graphene has been studied for a long time, but the truly independent and stable graphene was obtained by Geim et al. from the University of Manchester in the United Kingdom by stripping highly oriented graphite through adhesive tape. Since the discovery of graphene, due to its excellent performance and huge application prospects, it has triggered a research boom in the fields of physics and material science. However, the problem of controllable synthesis of graphene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 武斌耿德超黄丽平
Owner INST OF CHEM CHINESE ACAD OF SCI
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