DOI: 10.1116/1.1380721. Gas-phase production of carbon single-walled nanotubes from carbon monoxide via the HiPco process: A parametric study

Gas-phase production of carbon single-walled nanotubes from carbon monoxide via the HiPco process: A parametric study

10.1116/1.1380721

Crossref journal-article

American Vacuum Society

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films (20)

Abstract

We have demonstrated large-scale production (10 g/day) of high-purity carbon single-walled nanotubes (SWNTs) using a gas-phase chemical-vapor-deposition process we call the HiPco process. SWNTs grow in high-pressure (30–50 atm), high-temperature (900–1100 °C) flowing CO on catalytic clusters of iron. The clusters are formed in situ: Fe is added to the gas flow in the form of Fe(CO)5. Upon heating, the Fe(CO)5 decomposes and the iron atoms condense into clusters. These clusters serve as catalytic particles upon which SWNT nucleate and grow (in the gas phase) via CO disproportionation: CO+CO⇒CO2+C(SWNT). SWNT material of up to 97 mol % purity has been produced at rates of up to 450 mg/h. The HiPco process has been studied and optimized with respect to a number of process parameters including temperature, pressure, and catalyst concentration. The behavior of the SWNT yield with respect to various parameters sheds light on the processes that currently limit SWNT production, and suggests ways that the production rate can be increased still further.

Bibliography

Bronikowski, M. J., Willis, P. A., Colbert, D. T., Smith, K. A., & Smalley, R. E. (2001). Gas-phase production of carbon single-walled nanotubes from carbon monoxide via the HiPco process: A parametric study. Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 19(4), 1800â1805.

Authors 5

Michael J. Bronikowski (first)
Peter A. Willis (additional)
Daniel T. Colbert (additional)
K. A. Smith (additional)
Richard E. Smalley (additional)

References 24 Referenced 574

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Dates

Type	When
Created	23 years ago (July 27, 2002, 5:12 a.m.)
Deposited	2 years ago (Aug. 9, 2023, 12:56 a.m.)
Indexed	1 month, 2 weeks ago (July 3, 2025, 4:21 p.m.)
Issued	24 years, 1 month ago (July 1, 2001)
Published	24 years, 1 month ago (July 1, 2001)
Published Print	24 years, 1 month ago (July 1, 2001)

Funders 0

None

BibTeX

@article{Bronikowski_2001, title={Gas-phase production of carbon single-walled nanotubes from carbon monoxide via the HiPco process: A parametric study}, volume={19}, ISSN={1520-8559}, url={http://dx.doi.org/10.1116/1.1380721}, DOI={10.1116/1.1380721}, number={4}, journal={Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films}, publisher={American Vacuum Society}, author={Bronikowski, Michael J. and Willis, Peter A. and Colbert, Daniel T. and Smith, K. A. and Smalley, Richard E.}, year={2001}, month=jul, pages={1800–1805} }

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  "abstract": "<jats:p>We have demonstrated large-scale production (10 g/day) of high-purity carbon single-walled nanotubes (SWNTs) using a gas-phase chemical-vapor-deposition process we call the HiPco process. SWNTs grow in high-pressure (30\u201350 atm), high-temperature (900\u20131100\u200a\u00b0C) flowing CO on catalytic clusters of iron. The clusters are formed in situ: Fe is added to the gas flow in the form of Fe(CO)5. Upon heating, the Fe(CO)5 decomposes and the iron atoms condense into clusters. These clusters serve as catalytic particles upon which SWNT nucleate and grow (in the gas phase) via CO disproportionation: CO+CO\u21d2CO2+C(SWNT). SWNT material of up to 97 mol\u200a% purity has been produced at rates of up to 450 mg/h. The HiPco process has been studied and optimized with respect to a number of process parameters including temperature, pressure, and catalyst concentration. The behavior of the SWNT yield with respect to various parameters sheds light on the processes that currently limit SWNT production, and suggests ways that the production rate can be increased still further.</jats:p>",
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