Single-walled carbon nanotube synthesis using ferrocene and iron pentacarbonyl in a laminar flow reactor

Anna Moisala, Albert Nasibulin, David Brown, Hua Jiang, Leonid Khriachtchev, Esko I. Kauppinen (Corresponding Author)

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Abstract

A gas-phase process of single-walled carbon nanotube (SWCNT) formation, based on thermal decomposition of iron pentacarbonyl or ferrocene in the presence of carbon monoxide (CO), was investigated in ambient pressure laminar flow reactors in the temperature range of 600–1300 °C. Ferrocene was found to be a better catalyst precursor in the studied conditions since iron pentacarbonyl decomposes at lower temperatures resulting in the excessive growth of catalyst particles. In situ sampling carried out at 1000 °C showed that the SWCNT growth occurred from individual metal particles in the heating section of the furnace in the temperature range of 891–928 °C, in which the growth rate was estimated to exceed 2 μm/s. FT-IR measurements of gaseous products revealed that the majority of the CO disproportionation took place on the reactor walls. Raman measurements confirmed the results of TEM observations, namely, the formation of very high purity SWCNT product. On-line aerosol number size distributions were measured to detect the conditions of SWCNT formation and the product morphology changes. Mechanism of SWCNT formation in the gas phase from ferrocene and CO is discussed.
Original languageEnglish
Pages (from-to)4393-4402
JournalChemical Engineering Science
Volume61
Issue number13
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

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Keywords

  • aerosols
  • catalysis
  • carbon nanotubes
  • single-walled carbon nanotubes
  • SWCNT
  • laminar flow
  • nucleation
  • particle formation

Cite this

Moisala, A., Nasibulin, A., Brown, D., Jiang, H., Khriachtchev, L., & Kauppinen, E. I. (2006). Single-walled carbon nanotube synthesis using ferrocene and iron pentacarbonyl in a laminar flow reactor. Chemical Engineering Science, 61(13), 4393-4402. https://doi.org/10.1016/j.ces.2006.02.020