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

doi:10.1021/jp0512661

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 journal › Article › peer-review

116 Citations (Scopus)

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 language	English
Pages (from-to)	14319-14324
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	30
DOIs	https://doi.org/10.1021/jp0512661
Publication status	Published - Aug 4 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Opening mechanism of internal nanoporosity of single-wall carbon nanohorn",

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.",

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

year = "2005",

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doi = "10.1021/jp0512661",

language = "English",

volume = "109",

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T1 - Opening mechanism of internal nanoporosity of single-wall carbon nanohorn

AU - Utsuini, Shigenori

AU - Miyawaki, Jin

AU - Tanaka, Hideki

AU - Hattori, Yoshiyuki

AU - Itoi, Takaomi

AU - Ichikuni, Nobuyuki

AU - Kanoh, Hirofumi

AU - Yudasaka, Masako

AU - Iijima, Sumio

AU - Kaneko, Katsumi

PY - 2005/8/4

Y1 - 2005/8/4

N2 - 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.

AB - 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.

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DO - 10.1021/jp0512661

M3 - Article

C2 - 16852800

AN - SCOPUS:23844521332

SN - 1520-6106

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SP - 14319

EP - 14324

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 30

ER -

Opening mechanism of internal nanoporosity of single-wall carbon nanohorn

Abstract

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