Opening mechanism of internal nanoporosity of single-wall carbon nanohorn

Shigenori Utsuini, Jin Miyawaki, Hideki Tanaka, Yoshiyuki Hattori, Takaomi Itoi, Nobuyuki Ichikuni, Hirofumi Kanoh, Masako Yudasaka, Sumio Iijima, Katsumi Kaneko

Research output: Contribution to journalArticle

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Abstract

Single-wall carbon nanohorn (SWNH), which is a tubular particle with a cone cap, was oxidized in an oxygen flow at various temperatures. N2 adsorption at 77 K, thermogravimetry (TG), differential thermal analysis (DTA), transmission electron microscopy, and Raman spectroscopy measurements were carried out on the oxidized SWNHs. The specific surface area of the oxidized SWNHs can be controlled by oxidation temperature, giving the maximum value of 1420 m2/g. The pore size distribution by the BJH method and the comparison plot of the N2 adsorption isotherms of SWNH oxidized at different temperatures against that of as-grown SWNH revealed the minimum oxidation temperature for opening internal nanopores. TG-DTA analyses determined the components of as-grown SWNH: amorphous carbon 2.5 wt %, defective carbon at the cone part 15 wt %, tubular carbon 70 wt %, and graphitic carbon 12 wt %. These systematic analyses provided the exact internal nanopore volume of 0.49 mL/g for pure SWNH particles.

Original languageEnglish
Pages (from-to)14319-14324
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number30
DOIs
Publication statusPublished - Aug 4 2005
Externally publishedYes

Fingerprint

Nanohorns
Carbon
carbon
Nanopores
Differential Thermal Analysis
Thermogravimetry
Temperature
thermogravimetry
Differential thermal analysis
Thermogravimetric analysis
Cones
cones
thermal analysis
Adsorption
carbon 12
Oxidation
oxidation
adsorption
temperature
Amorphous carbon

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Utsuini, S., Miyawaki, J., Tanaka, H., Hattori, Y., Itoi, T., Ichikuni, N., ... Kaneko, K. (2005). Opening mechanism of internal nanoporosity of single-wall carbon nanohorn. Journal of Physical Chemistry B, 109(30), 14319-14324. https://doi.org/10.1021/jp0512661

Opening mechanism of internal nanoporosity of single-wall carbon nanohorn. / Utsuini, Shigenori; Miyawaki, Jin; Tanaka, Hideki; Hattori, Yoshiyuki; Itoi, Takaomi; Ichikuni, Nobuyuki; Kanoh, Hirofumi; Yudasaka, Masako; Iijima, Sumio; Kaneko, Katsumi.

In: Journal of Physical Chemistry B, Vol. 109, No. 30, 04.08.2005, p. 14319-14324.

Research output: Contribution to journalArticle

Utsuini, S, Miyawaki, J, Tanaka, H, Hattori, Y, Itoi, T, Ichikuni, N, Kanoh, H, Yudasaka, M, Iijima, S & Kaneko, K 2005, 'Opening mechanism of internal nanoporosity of single-wall carbon nanohorn', Journal of Physical Chemistry B, vol. 109, no. 30, pp. 14319-14324. https://doi.org/10.1021/jp0512661
Utsuini, Shigenori ; Miyawaki, Jin ; Tanaka, Hideki ; Hattori, Yoshiyuki ; Itoi, Takaomi ; Ichikuni, Nobuyuki ; Kanoh, Hirofumi ; Yudasaka, Masako ; Iijima, Sumio ; Kaneko, Katsumi. / Opening mechanism of internal nanoporosity of single-wall carbon nanohorn. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 30. pp. 14319-14324.
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