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Macro preparation method for mesoporous ordered graphene

A mesoporous ordered, graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of graphene performance far from theoretical value, graphene re-agglomeration, high cost and other problems

Active Publication Date: 2013-05-22
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A certain proportion of graphene can be prepared by chemical exfoliation, liquid phase exfoliation and thermal exfoliation. However, how to overcome the strong π-π bonds in graphene and the re-agglomeration of graphene induced by the van der Waals force between graphite layers needs to be solved urgently.
Moreover, this type of exfoliation method often introduces a higher content of oxygen functional groups in graphene, resulting in the performance of the obtained graphene in many aspects far from the theoretical value.
Graphene prepared by chemical vapor deposition and epitaxial growth has good application prospects in the fields of electronics and optoelectronics, but its experimental conditions are relatively high, resulting in high costs.
The equipment used in the solvothermal method is simple and the price of raw materials is low, but there is also the problem of graphene re-agglomeration

Method used

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  • Macro preparation method for mesoporous ordered graphene
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  • Macro preparation method for mesoporous ordered graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 6g of magnesium strips and ignite the magnesium strips in a 500mL beaker filled with carbon dioxide gas. In 100mL of NH with a concentration of 0.1mol / L 4 HCO 3 Quenching treatment in aqueous solution. Soak the obtained reaction product with 500 mL of hydrochloric acid solution with a concentration of 2 mol / L for 24 hours, vacuum filter it under -0.1 MPa, and add deionized water to wash it fully during the suction filtration process, and then dry it at 60 ° C for 24 hours to obtain the medium Porous ordered graphene. Which attached figure 1 It shows that the thickness of the graphene sheet is 0.7-1.2nm, which is 1-2 layers, with figure 2 And attached image 3 It is proved that there is an ordered mesoporous structure in the graphene sheet, and the pore distribution is 2-10nm.

Embodiment 2

[0020] Weigh 2g of magnesium strips and ignite the magnesium strips in a 500mL beaker filled with carbon dioxide gas. In 40mL of NH with a concentration of 0.01mol / L 4 HCO 3 Quenching treatment in aqueous solution. Soak the obtained reaction product with 200 mL of sulfuric acid solution with a concentration of 2 mol / L for 24 hours, vacuum filter at -0.1 MPa, and add deionized water during the process of suction to fully wash, then dry at 60 ° C for 24 hours to obtain medium Porous ordered graphene.

Embodiment 3

[0022] Weigh 4g of magnesium strips and ignite the magnesium strips in a 500mL beaker filled with carbon dioxide gas. In 80mL of NH with a concentration of 0.05mol / L 4 HCO 3 Quenching treatment in aqueous solution. Soak the obtained reaction product with 400 mL of nitric acid solution with a concentration of 2 mol / L for 24 hours, vacuum filter at -0.1 MPa, and add deionized water during the process of suction to fully wash, then dry at 60 ° C for 24 hours to obtain medium Porous ordered graphene.

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Abstract

The invention relates to a macro preparation method for mesoporous ordered graphene, and belongs to the technical field of nanometer materials. The method is characterized in that graphene is prepared by chemical transformation of carbon dioxide gas and in-situ quenching method. The method comprises the following steps of: igniting magnesium in a container filled with carbon dioxide to perform reaction of magnesium and carbon dioxide, and quenching the reaction product in different media; then, removing magnesium and magnesium oxide in the mixture; and washing and drying to obtain graphene. The method has the advantages that mesoporous ordered graphene is self-grown without a template, the method is simple to operate, low in cost and environment-friendly, and prepared graphene is high in quality and yield.

Description

technical field [0001] The invention relates to a method for preparing mesoporous ordered graphene. Background technique [0002] Since Novoselov et al. used "tape technology" for the first time to report that the monoatomic layer two-dimensional material graphene can exist stably, and confirmed that this material has excellent mechanical, physical and electrical properties, the related research work on graphene has rapidly become an important part of physics, materials and Hotspots in chemical science research. In the past 7-8 years, basic research on graphene has been carried out extensively, and there is a prospect of further commercial application. At present, the method for preparing graphene has mechanical exfoliation method [Science 306 (2004) 666], chemical exfoliation method [Carbon 45 (2007) 1558], liquid phase exfoliation method [Nat Nanotechnol 3 (2008) 563], thermal exfoliation method [ J Phys Chem B 110(2006)8535], chemical vapor deposition method [Chinese pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 马衍伟张海涛张熊孙现众张大成
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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