Differences in the catalyst removal from single- and double-walled carbon nanotubes

Jae Won Jang, Kyu Won Lee, Cheol Eui Lee, Bawl Kim, Cheol Jin Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Single-walled carbon nanotubes (SWCNTs) and double-walled carbon nanotubes (DWCNTs) synthesized by a catalytic chemical vapor deposition method showed partially incorporated metal catalysts inside the graphene walls. In order to remove the metal catalysts, acid and thermal treatments were successively carried out. The methods for effective catalyst removal in SWCNTs and DWCNTs were examined by means of thermogravimetric analysis, electron microscopy, and electron paramagnetic resonance. The DWCNTs showed distinctly different metal catalyst removal behavior from that of SWCNTs due to the double-wall structure. The acid treatment is less efficient for catalyst removal from DWCNTs, while catalysts in SWCNTs are effectively removed by acid treatment. Additional thermal treatment is quite effective to remove metal catalysts from DWCNTs.

Original languageEnglish
Pages (from-to)1069-1074
Number of pages6
JournalCurrent Applied Physics
Volume13
Issue number6
DOIs
Publication statusPublished - 2013 Aug 1

Fingerprint

Carbon Nanotubes
Carbon nanotubes
carbon nanotubes
catalysts
Catalysts
Single-walled carbon nanotubes (SWCN)
Metals
Acids
Heat treatment
metals
acids
Graphite
Graphene
Electron microscopy
Paramagnetic resonance
Thermogravimetric analysis
Chemical vapor deposition
electron microscopy
electron paramagnetic resonance
graphene

Keywords

  • Doubled-walled carbon nanotubes (DWCNTs)
  • Electron paramagnetic resonance (EPR)
  • Purification
  • Thermogravimetric analysis (TGA)

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Differences in the catalyst removal from single- and double-walled carbon nanotubes. / Jang, Jae Won; Lee, Kyu Won; Lee, Cheol Eui; Kim, Bawl; Lee, Cheol Jin.

In: Current Applied Physics, Vol. 13, No. 6, 01.08.2013, p. 1069-1074.

Research output: Contribution to journalArticle

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