High yiel vapor phase deposition method for large scale sing walled carbon nanotube preparation
First Claim
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1. A method of preparing single walled carbon nanotubes comprising depositing a carbon-containing compound under vapor phase conditions onto a supported catalyst comprising a metal catalyst and an aerogel support while heating under reaction conditions of temperature sufficient and time sufficient to form the single walled carbon nanotubes on the aerogel supported catalyst.
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Abstract
An improved vapor phase deposition method for preparation of single walled carbon nanotubes on an aerogel supported metal catalyst. The total yield of SWCNTs often is at least about 100%, based the weight of the catalyst, for a reaction time of at least about 30 minutes.
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18 Claims
- 1. A method of preparing single walled carbon nanotubes comprising depositing a carbon-containing compound under vapor phase conditions onto a supported catalyst comprising a metal catalyst and an aerogel support while heating under reaction conditions of temperature sufficient and time sufficient to form the single walled carbon nanotubes on the aerogel supported catalyst.
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18. A method of preparing single walled carbon nanotubes comprising depositing a carbon-containing compound under vapor phase conditions onto a supported catalyst comprising a metal catalyst and an aerogel support where the carbon-containing compound is selected from the group consisting of methane, carbon monoxide, and combinations thereof, where the metal catalyst is selected from the group consisting of Fe/Mo, Fe/Pt, and combinations thereof, where the aerogel support is selected from the group consisting of Al2O3 aerogel support, Al2O3/SiO2 aerogel support, and combinations thereof, where the aerogel supported catalyst has been dried by drying selected from the group consisting of supercritical drying, freeze drying, and combinations thereof, and where said depositing is with a sufficient flow rate of the carbon-containing compound, with sufficient heat for a sufficient time, to obtain a yield of at least about 100% based on the weight of the catalyst.
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