Nitrogen physisorption and site blocking on single-walled carbon nanotubes

S. K. Lee, S. Iwata, S. Ogura, Y. Sato, K. Tohji, K. Fukutani

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

N 2 physisorption on Single-Walled Carbon Nanotubes (SWCNTs) was investigated by cryogenic thermal-desorption spectroscopy (cryo-TDS). TDS spectra revealed a desorption peak at 48 K (α) for as-purified SWCNTs and an additional desorption peak at 73 K (β) for air-oxidized SWCNTs. When N 2 and H 2 were coadsorbed on SWCNTs, H 2 adsorption was blocked by the N 2 preadsorption. By comparing the TDS data with and without the N 2 preadsorption, the α and β peaks were attributed to N 2 adsorbed on the groove site and inside of SWCNTs, respectively.

Original languageEnglish
Pages (from-to)293-296
Number of pages4
JournalSurface Science
Volume606
Issue number3-4
DOIs
Publication statusPublished - 2012 Feb

Keywords

  • Gas adsorption
  • Hydrogen
  • Nitrogen
  • Single-walled carbon nanotube

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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