Controlled opening of single-wall carbon nanohorns by heat treatment in carbon dioxide

Elena Bekyarova; Katsumi Kaneko; Masako Yudasaka; Daisuke Kasuya; Sumio Iijima; Ana Huidobro; Francisco Rodriguez-Reinoso

doi:10.1021/jp026737n

Controlled opening of single-wall carbon nanohorns by heat treatment in carbon dioxide

Elena Bekyarova
, Katsumi Kaneko^*
, Masako Yudasaka
, Daisuke Kasuya
, Sumio Iijima
, Ana Huidobro
, Francisco Rodriguez-Reinoso

^*Corresponding author for this work

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

80 Citations (Scopus)

Abstract

The opening of bud-type single-wall carbon nanohorns (SWNHs) by heat treatment in CO₂ was studied by TEM and nitrogen adsorption (77 K). The adsorption isotherms indicate that oxidation by CO₂ at 1273 K provides a sufficient nanohorn opening. The pore structure parameters of the open nanohorns can be controlled by varying the treatment conditions; the size of the generated nanopores increases with the temperature and time of treatment. In addition, TPD experiments indicate a significant decrease of the oxygen content in SWNHs opened by heat treatment in CO₂. This is in contrast to the procedures reported in the literature for opening of carbon nanotubular structures, typically introducing oxygen functional groups.

Original language	English
Pages (from-to)	4479-4484
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	19
DOIs	https://doi.org/10.1021/jp026737n
Publication status	Published - 15 May 2003
Externally published	Yes

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title = "Controlled opening of single-wall carbon nanohorns by heat treatment in carbon dioxide",

abstract = "The opening of bud-type single-wall carbon nanohorns (SWNHs) by heat treatment in CO2 was studied by TEM and nitrogen adsorption (77 K). The adsorption isotherms indicate that oxidation by CO2 at 1273 K provides a sufficient nanohorn opening. The pore structure parameters of the open nanohorns can be controlled by varying the treatment conditions; the size of the generated nanopores increases with the temperature and time of treatment. In addition, TPD experiments indicate a significant decrease of the oxygen content in SWNHs opened by heat treatment in CO2. This is in contrast to the procedures reported in the literature for opening of carbon nanotubular structures, typically introducing oxygen functional groups.",

author = "Elena Bekyarova and Katsumi Kaneko and Masako Yudasaka and Daisuke Kasuya and Sumio Iijima and Ana Huidobro and Francisco Rodriguez-Reinoso",

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AU - Bekyarova, Elena

AU - Kaneko, Katsumi

AU - Yudasaka, Masako

AU - Kasuya, Daisuke

AU - Iijima, Sumio

AU - Huidobro, Ana

AU - Rodriguez-Reinoso, Francisco

PY - 2003/5/15

Y1 - 2003/5/15

N2 - The opening of bud-type single-wall carbon nanohorns (SWNHs) by heat treatment in CO2 was studied by TEM and nitrogen adsorption (77 K). The adsorption isotherms indicate that oxidation by CO2 at 1273 K provides a sufficient nanohorn opening. The pore structure parameters of the open nanohorns can be controlled by varying the treatment conditions; the size of the generated nanopores increases with the temperature and time of treatment. In addition, TPD experiments indicate a significant decrease of the oxygen content in SWNHs opened by heat treatment in CO2. This is in contrast to the procedures reported in the literature for opening of carbon nanotubular structures, typically introducing oxygen functional groups.

AB - The opening of bud-type single-wall carbon nanohorns (SWNHs) by heat treatment in CO2 was studied by TEM and nitrogen adsorption (77 K). The adsorption isotherms indicate that oxidation by CO2 at 1273 K provides a sufficient nanohorn opening. The pore structure parameters of the open nanohorns can be controlled by varying the treatment conditions; the size of the generated nanopores increases with the temperature and time of treatment. In addition, TPD experiments indicate a significant decrease of the oxygen content in SWNHs opened by heat treatment in CO2. This is in contrast to the procedures reported in the literature for opening of carbon nanotubular structures, typically introducing oxygen functional groups.

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DO - 10.1021/jp026737n

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SP - 4479

EP - 4484

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 19

ER -

Controlled opening of single-wall carbon nanohorns by heat treatment in carbon dioxide

Abstract

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