Carbon nanohorn carried material and process for producing carbon nanotube

• US 8,835,006 B2
• Filed: 05/31/2012
• Issued: 09/16/2014
• Est. Priority Date: 01/31/2006
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Iijima, Sumio, Yudasaka, Masako, Miyawaki, Jin
• Primary Examiner(s): MCCRACKEN, DANIEL
• Application Number:
  US13/484,916
• Publication Number:
  US 20120270051A1
• Time in Patent Office: 838 Days
• Field of Search: 4234471-4473, 423/445.B, 977742-754, 977842-848, 428/367, 204/157.47, 4272491-249
• US Class Current: 428/403
• CPC Class Codes: B01J 21/185 Carbon nanotubes carbon nanotubes per se C01B32/15
• CPC Class Codes: B01J 23/24 Chromium, molybdenum or tungsten
• CPC Class Codes: B01J 23/42 Platinum
• CPC Class Codes: B01J 23/74 Iron group metals
• CPC Class Codes: B01J 23/745 Iron
• CPC Class Codes: B01J 37/0207 Pretreatment of the support
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 2202/02 Single-walled nanotubes
• CPC Class Codes: C01B 2202/04 Nanotubes with a specific amount of walls
• CPC Class Codes: C01B 2202/06 Multi-walled nanotubes
• CPC Class Codes: C01B 32/162 characterised by catalysts
• CPC Class Codes: C01P 2004/13 Nanotubes
• CPC Class Codes: Y10S 977/773 Nanoparticle, i.e. structure having three dimensions of 100 nm or less
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A carbon nanohorn carried material for producing a carbon nanotube by a chemical vapor deposition (CVD) method, including a catalytic metal or a compound thereof contained inside carbon nanohorns or supported on exterior walls of the carbon nanohorns is provided. A carbon nanotube is produced by a CVD reaction using the carbon nanohorn carried material. A novel technical means for producing a carbon nanotube which does not use any noncarbon type carrier, can easily collect and purify the carbon nanotube and can control the length of the carbon nanotube can be provided.

Claims

1. A carbon nanohorn aggregate-carbon nanotube complex, wherein the carbon nanotube is terminated on the surface of the carbon nanohorn aggregate, wherein the complex comprises iron oxide particles, and wherein the length of the carbon nanotube is greater than the radius of the carbon nanohorn aggregate.