Heterogeneity analysis of single-walled carbon nanotubes from the adsorption equilibria of nitrogen and benzene

Wang Geun Shim, Hyun Chul Kang, Chan Kim, Jae Wook Lee, Sang Chai Kim, Chul Jin Lee, Hee Moon

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nitrogen adsorption/desorption isotherms and gravimetric methods were employed to examine the structural and adsorption properties of selected adsorbent. The equilibrium data of benzene were also obtained at three different temperatures (303.15, 313.15, and 323.15 K) with pressures up to 7 kPa. The results of nitrogen and benzene sorption isotherm revealed that SWCNTs exhibit type II with the features of type I. The Toth and UNILAN models were found to provide a reasonable correlation between the adsorption isotherm data. In addition, the adsorption second virial coefficient and the isosteric heat of adsorption were determined by using these isotherm models. The isosteric heat of adsorption and adsorption energy distribution indicated that SWCNTs have energetically and structurally heterogeneous surfaces.

Original languageEnglish
Pages (from-to)3583-3588
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume6
Issue number11
DOIs
Publication statusPublished - 2006 Nov

Keywords

  • Adsorption
  • Heterogeneity
  • Single-walled carbon nanotubes (SWCNTs)

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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