(n,m) selectivity of single-walled carbon nanotubes by different carbon precursors on Co-Mo catalysts

Bo Wang, C. H.Patrick Poa, Li Wei, Lain-Jong Li, Yanhui Yang, Yuan Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

169 Scopus citations

Abstract

Single walled carbon nanotubes (SWCNTs) were synthesized using four different carbon precursors including CO, C2H5OH, CH 3OH, and C2H2 on Co-Mo catalysts. Semiconducting (n,m) abundance was evaluated by a method based on a single-particle tight-binding theoretical model taking into consideration the relative photoluminescence and absorption quantum efficiency for specific (n,m) tubes. (n,m) abundance determined in photoluminescence analysis was used to reconstruct the near-infrared Es11 absorption spectra. Carbon precursor pressure was found to be the key factor to the chirality control in this study. Narrowly (n,m) distributed SWCNTs can only be obtained under high-pressure CO or vacuumed C2H5OH and CH 3-OH. The majority of these nanotubes are predominately in the same higher chiral-angle region. The carbon precursor chemistry may also play an important role to obtain narrowly (n,m) distributed SWCNTs. (n,m) selectivity on Co-Mo catalysts shifts under different carbon precursors providing the route for (n,m) specific SWCNTs production.

Original languageEnglish (US)
Pages (from-to)9014-9019
Number of pages6
JournalJournal of the American Chemical Society
Volume129
Issue number29
DOIs
StatePublished - Jul 25 2007

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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