Fe-catalyzed single-walled carbon nanotube synthesis within a flame environment

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Flame synthesis of single walled carbon nanotubes (SWNT) is demonstrated using Fe nanoparticles [introduced by nebulization of an iron (III) nitrate salt solution] within a pyrolysis flame configuration. The roles of the nebulized solution solvent, metal nitrate concentration, pyrolysis flame gas composition, and the surrounding flame gas composition are interpreted as reflecting suitable concentrations of reactants without excessive pyrolysis products or deactivating species. The preferential reactivity of the catalyst particle toward CO and not toward C2H2 is understood as reflecting nanoparticle restructuring, interactions between co-adsorbates and reactant pyrolysis products. Fe is found to exhibit preferential reactivity toward CO for SWNT catalysis with this reactivity being strongly dependent upon catalyst particle size within our flame conditions. H2 appears to moderate the dissociative adsorption through electronic interactions with co-adsorbates, mediated by the catalyst nanoparticle and by maintaining a catalytically clean particle surface.

Original languageEnglish (US)
Pages (from-to)37-47
Number of pages11
JournalCombustion and Flame
Volume130
Issue number1-2
DOIs
StatePublished - Jul 22 2002

Fingerprint

Single-walled carbon nanotubes (SWCN)
flames
Pyrolysis
carbon nanotubes
pyrolysis
Adsorbates
Carbon Monoxide
synthesis
Nanoparticles
Nitrates
reactivity
Catalysts
gas composition
catalysts
Flame synthesis
Gases
nanoparticles
nitrates
Chemical analysis
Catalysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

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title = "Fe-catalyzed single-walled carbon nanotube synthesis within a flame environment",
abstract = "Flame synthesis of single walled carbon nanotubes (SWNT) is demonstrated using Fe nanoparticles [introduced by nebulization of an iron (III) nitrate salt solution] within a pyrolysis flame configuration. The roles of the nebulized solution solvent, metal nitrate concentration, pyrolysis flame gas composition, and the surrounding flame gas composition are interpreted as reflecting suitable concentrations of reactants without excessive pyrolysis products or deactivating species. The preferential reactivity of the catalyst particle toward CO and not toward C2H2 is understood as reflecting nanoparticle restructuring, interactions between co-adsorbates and reactant pyrolysis products. Fe is found to exhibit preferential reactivity toward CO for SWNT catalysis with this reactivity being strongly dependent upon catalyst particle size within our flame conditions. H2 appears to moderate the dissociative adsorption through electronic interactions with co-adsorbates, mediated by the catalyst nanoparticle and by maintaining a catalytically clean particle surface.",
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}

Fe-catalyzed single-walled carbon nanotube synthesis within a flame environment. / Vander Wal, Randy Lee.

In: Combustion and Flame, Vol. 130, No. 1-2, 22.07.2002, p. 37-47.

Research output: Contribution to journalArticle

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