Porous graphene as well as preparation method and application thereof

A technology of porous graphene and graphene, which is applied in the field of preparation of porous graphene materials, can solve the problems of unsatisfactory industrial application, cost and complicated experimental process, etc., and achieve remarkable opening effect, wide application range and simple experimental process Effect

Inactive Publication Date: 2015-07-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a small number of chemical methods can achieve large-scale preparation, there are still big problems in the pore size distribution, and many methods use noble metals or complex chemicals. The cost and experimental process are relatively complicated, which still cannot meet industrial applications.

Method used

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  • Porous graphene as well as preparation method and application thereof
  • Porous graphene as well as preparation method and application thereof
  • Porous graphene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Add 10ml of 80mM ferric nitrate aqueous solution to 200ml of 0.05%wt / wt GO aqueous solution, stir at room temperature for 24h, then centrifuge, and dry GO at 60°C after compounding iron ions.

[0034] 2) Treat the dried sample at 900° C. for 30 minutes under a protective atmosphere. The sample obtained after cooling was soaked in dilute hydrochloric acid, washed with deionized water, and dried at 80° C. to obtain the final porous graphene material.

[0035] In this embodiment, due to the large amount of metal ions used in opening the pores, many pores are superimposed to form continuous pores, and there are also many small pores distributed, and the pore size distribution is not very uniform. The pores are evenly distributed on the graphene without enrichment in certain regions. Its pore size (diameter) distribution ranges from 50 to 400nm, mainly concentrated at 150nm, and the number of pores is 36 / μm 2 .

Embodiment 2

[0037] 1) Add 1ml of 80mM ferric nitrate aqueous solution to 200ml of 0.05%wt / wt GO aqueous solution, stir at room temperature for 24h, then centrifuge, and dry GO at 60°C after compounding iron ions.

[0038]2) Treat the dried sample at 900° C. for 30 minutes under a protective atmosphere. The sample obtained after cooling was soaked in dilute hydrochloric acid, washed with deionized water, and dried at 80° C. to obtain the final porous graphene material.

[0039] In this embodiment, since the amount of metal ions used in opening the pores is more appropriate, the pores are not superimposed on each other, and are basically isolated pores. In addition, the uniformity of the pore size distribution is better. The pores are evenly distributed on the graphene without enrichment in certain regions. Its pore size (diameter) distribution ranges from 20 to 200nm, mainly concentrated at 80nm, and the number of pores is 66 / μm 2 .

Embodiment 3

[0041] 1) Add 0.1ml of 80mM ferric nitrate aqueous solution to 200ml of 0.05% wt / wt GO aqueous solution, stir at room temperature for 24h, then centrifuge, and dry GO at 60°C after compounding iron ions.

[0042] 2) Treat the dried sample at 900° C. for 30 minutes under a protective atmosphere. The sample obtained after cooling was soaked in dilute hydrochloric acid, washed with deionized water, and dried at 80° C. to obtain the final porous graphene material.

[0043] In this embodiment, since the amount of metal ions used to open the pores is small, the pores do not overlap with each other and exist in isolation; the uniformity of the pore size distribution is better. In addition, compared to Example 2, the number of holes is much reduced. Pores are regionally enriched in graphene. Its pore size (diameter) distribution ranges from 150 to 200nm, mainly concentrated at 80nm, and the number of pores is 7.5 / μm 2 .

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Abstract

The invention discloses a method for preparing porous graphene. The method comprises the following steps: mixing a soluble metal saline solution with a graphene oxide water solution, stirring and drying, and performing thermal treatment and acid treatment to obtain the porous graphene material; the metal in the soluble metal saline solution is chosen from nickel, cobalt, copper, iron or manganese. The invention also discloses the porous graphene prepared by the method and an application of the the porous graphene to a supercapacitor. By adopting the method for trepanning graphene by using a metal cation, provided by the invention, the preparation process is simple, the application scope is wide, the aperture and pore distribution is simple to control and the industrialization of the porous graphene is possible.

Description

technical field [0001] The invention relates to a graphene material, in particular to a preparation method and application of a porous graphene material. Background technique [0002] For more than half a century, due to the increasing shortage of oil resources and the increasing pollution of the environment by the exhaust gas produced by burning oil in internal combustion engines (especially in large and medium cities), people have been studying a new energy device to replace internal combustion engines. At this stage, the research and development of hybrid power, fuel cells, and chemical battery products and applications have achieved certain results, such as Tesla electric vehicles, BYD electric buses, etc., but due to their inherent short service life and temperature characteristics Achilles' heels such as poor quality, chemical battery pollution, system complexity, and high cost have not been well resolved. With its excellent characteristics, supercapacitors can partia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01G11/24
CPCY02E60/13
Inventor 彭新生应玉龙
Owner ZHEJIANG UNIV
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