Optimization of flame synthesis for carbon nanotubes using supported catalyst

Randy Lee Vander Wal; Lee J. Hall; Gordon M. Berger

doi:10.1021/jp020614l

Optimization of flame synthesis for carbon nanotubes using supported catalyst

Randy Lee Vander Wal, Lee J. Hall, Gordon M. Berger

Research output: Contribution to journal › Article › peer-review

98 Scopus citations

Abstract

A series of rich premixed flames are used to realize a post-flame gas mixture for optimum carbon nanotube (CNT) growth using inexpensive hydrocarbon fuels. The mixture of CO, CO₂, H₂, and H₂O is varied through use of hydrocarbon fuels with different H/C ratio in flames with different fuel/air ratios. Both SEM and HRTEM imaging are used to correlate the nanotube morphology and internal structure to the reaction gas composition. The variations observed are understood in light of the gas composition and the interaction of the reactive components with both the deposited Co catalyst particles and supporting metal substrate. Further comparisons between flames producing the same CO or H₂ concentrations identify the roles of these gases in CNT synthesis. Optimal flame synthesis conditions, defined upon a H₂ and CO concentration map, are gauged on the basis of CNT length, relative surface density, and level of graphitic structure.

Original language	English (US)
Pages (from-to)	13122-13132
Number of pages	11
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	51
DOIs	https://doi.org/10.1021/jp020614l
State	Published - Dec 26 2002

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Optimization of flame synthesis for carbon nanotubes using supported catalyst",

abstract = "A series of rich premixed flames are used to realize a post-flame gas mixture for optimum carbon nanotube (CNT) growth using inexpensive hydrocarbon fuels. The mixture of CO, CO2, H2, and H2O is varied through use of hydrocarbon fuels with different H/C ratio in flames with different fuel/air ratios. Both SEM and HRTEM imaging are used to correlate the nanotube morphology and internal structure to the reaction gas composition. The variations observed are understood in light of the gas composition and the interaction of the reactive components with both the deposited Co catalyst particles and supporting metal substrate. Further comparisons between flames producing the same CO or H2 concentrations identify the roles of these gases in CNT synthesis. Optimal flame synthesis conditions, defined upon a H2 and CO concentration map, are gauged on the basis of CNT length, relative surface density, and level of graphitic structure.",

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AU - Hall, Lee J.

AU - Berger, Gordon M.

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N2 - A series of rich premixed flames are used to realize a post-flame gas mixture for optimum carbon nanotube (CNT) growth using inexpensive hydrocarbon fuels. The mixture of CO, CO2, H2, and H2O is varied through use of hydrocarbon fuels with different H/C ratio in flames with different fuel/air ratios. Both SEM and HRTEM imaging are used to correlate the nanotube morphology and internal structure to the reaction gas composition. The variations observed are understood in light of the gas composition and the interaction of the reactive components with both the deposited Co catalyst particles and supporting metal substrate. Further comparisons between flames producing the same CO or H2 concentrations identify the roles of these gases in CNT synthesis. Optimal flame synthesis conditions, defined upon a H2 and CO concentration map, are gauged on the basis of CNT length, relative surface density, and level of graphitic structure.

AB - A series of rich premixed flames are used to realize a post-flame gas mixture for optimum carbon nanotube (CNT) growth using inexpensive hydrocarbon fuels. The mixture of CO, CO2, H2, and H2O is varied through use of hydrocarbon fuels with different H/C ratio in flames with different fuel/air ratios. Both SEM and HRTEM imaging are used to correlate the nanotube morphology and internal structure to the reaction gas composition. The variations observed are understood in light of the gas composition and the interaction of the reactive components with both the deposited Co catalyst particles and supporting metal substrate. Further comparisons between flames producing the same CO or H2 concentrations identify the roles of these gases in CNT synthesis. Optimal flame synthesis conditions, defined upon a H2 and CO concentration map, are gauged on the basis of CNT length, relative surface density, and level of graphitic structure.

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Optimization of flame synthesis for carbon nanotubes using supported catalyst

Abstract

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