Carbon nanosheet and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-11261091-B2
Application number	US-201816957890-A
Country	US
Kind code	B2
Filing date	Dec 25, 2018
Priority date	Dec 25, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A carbon nanosheet, which is a sheet-form carbon nanomaterial having a larger area as compared with that of a similar conventional product and a side length of about 1 μm, and a method for producing the carbon nanosheet. The carbon nanosheet production method includes a step of mixing a solution of an iron atom-containing compound dispersed in a solvent with an alcohol, to thereby prepare a solution mixture; and a step of irradiating the solution mixture with plasma, to thereby produce a carbon nanosheet. The carbon nanosheet has a side length of 0.5 μm to 2.5 μm.

First claim

The invention claimed is:

1. A method for producing a carbon nanosheet, comprising
mixing a solution of an iron atom-containing compound dispersed in a solvent with an alcohol, to thereby prepare a solution mixture; and
irradiating the solution mixture with plasma, to thereby produce a carbon nanosheet.

2. A carbon nanosheet production method according to claim 1 , wherein
irradiating the solution mixture with plasma employs a first electrode in a gas phase and a second electrode in the solution mixture, and
electric discharge is caused to occur at the gas-liquid interface through application of a voltage between the first electrode and the second electrode.

3. A carbon nanosheet production method according to claim 1 , wherein,
irradiation the solution mixture with plasma, electric discharge is caused to occur between an end portion of the first electrode and a lateral surface of the second electrode.

4. A carbon nanosheet production method according to claim 2 , wherein at least one of the first electrode and the second electrode is made of a carbon material.

5. A carbon nanosheet production method according to claim 1 , wherein, irradiation the solution mixture with plasma, CN radicals are generated.

6. A carbon nanosheet production method according to claim 1 , wherein, irradiation the solution mixture with plasma,
a container for accommodating the solution mixture is employed, and
the solution mixture is irradiated with plasma, while the interior of the container is purged with noble gas.

7. A carbon nanosheet production method according to claim 1 , wherein the iron atom-containing compound is an organic compound.

8. A carbon nanosheet production method according to claim 7 , wherein the organic compound has a metal-nitrogen bond but no metal-carbon bond.

9. A carbon nanosheet production method according to claim 1 , wherein the alcohol is ethanol.

10. A carbon nanosheet production method according to claim 1 , wherein the solvent is an organic solvent.

11. A carbon nanosheet production method according to claim 1 , wherein, the solution mixture is irradiated with plasma at a plasma density of 3×10 14 cm −3 to 7×10 14 cm −3 .

12. A carbon nanosheet production method according to claim 1 , wherein the carbon nanosheet has a side having a length of 0.5 μm to 2.5 μm.

Assignees

• National Univ Corporation Tokai National Higher Education And Research System
• Univ Nagoya Nat Univ Corp

Inventors

• Hori Masaru
• Kondo Hiroki
• Ishikawa Kenji

Classifications

• H01J37/32

  Gas-filled discharge tubes (heating by discharge H05B) · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title