Highly compressed nanosolution restricted in cylindrical carbon nanospaces

Masayasu Nishi, Takahiro Ohkubo, Kazuma Tsurusaki, Atsushi Itadani, Bashir Ahmmad, Koki Urita, Isamu Moriguchi, Shigeharu Kittaka, Yasushige Kuroda

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We shed light on the specific hydration structure around a zinc ion of nanosolution restricted in a cylindrical micropore of single-wall carbon nanotube (SWNT) by comparison with the structure restricted in a cylindrical mesopore of multi-wall carbon nanotube (MWNT) and that of bulk aqueous solution. The average micropore width of open-pore SWNT was 0.87 nm which is equivalent to the size of a hydrated zinc ion having 6-hydrated water molecules. We could impregnate the zinc ions into the micropore of SWNT with negligible amounts of ion-exchanged species on surface functional groups by the appropriate oxidation followed by heat treatment under an inert condition. The results of X-ray absorption fine structure (XAFS) spectra confirmed that the proportion of dissolved species in nanospaces against the total adsorbed amounts of zinc ions on the open-pore SWNT and MWNT were 44 and 61%, respectively, indicating the formation of a dehydrated structure in narrower nanospaces. The structure parameters obtained by the analysis of XAFS spectra also indicate that the dehydrated and highly compressed hydration structure can be stably formed inside the cylindrical micropore of SWNT where the structure is different from that inside the slit-shaped micropore whose pore width is less than 1 nm. Such a unique structure needs not only a narrow micropore geometry which is equivalent to the size of a hydrated ion but also the cylindrical nature of the pore.

Original languageEnglish
Pages (from-to)2080-2088
Number of pages9
JournalNanoscale
Volume5
Issue number5
DOIs
Publication statusPublished - Mar 7 2013

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Carbon
Ions
Zinc
X ray absorption
Hydration
Functional groups
Heat treatment
Oxidation
Molecules
Geometry
Water

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Highly compressed nanosolution restricted in cylindrical carbon nanospaces. / Nishi, Masayasu; Ohkubo, Takahiro; Tsurusaki, Kazuma; Itadani, Atsushi; Ahmmad, Bashir; Urita, Koki; Moriguchi, Isamu; Kittaka, Shigeharu; Kuroda, Yasushige.

In: Nanoscale, Vol. 5, No. 5, 07.03.2013, p. 2080-2088.

Research output: Contribution to journalArticle

Nishi, M, Ohkubo, T, Tsurusaki, K, Itadani, A, Ahmmad, B, Urita, K, Moriguchi, I, Kittaka, S & Kuroda, Y 2013, 'Highly compressed nanosolution restricted in cylindrical carbon nanospaces', Nanoscale, vol. 5, no. 5, pp. 2080-2088. https://doi.org/10.1039/c2nr33681b
Nishi M, Ohkubo T, Tsurusaki K, Itadani A, Ahmmad B, Urita K et al. Highly compressed nanosolution restricted in cylindrical carbon nanospaces. Nanoscale. 2013 Mar 7;5(5):2080-2088. https://doi.org/10.1039/c2nr33681b
Nishi, Masayasu ; Ohkubo, Takahiro ; Tsurusaki, Kazuma ; Itadani, Atsushi ; Ahmmad, Bashir ; Urita, Koki ; Moriguchi, Isamu ; Kittaka, Shigeharu ; Kuroda, Yasushige. / Highly compressed nanosolution restricted in cylindrical carbon nanospaces. In: Nanoscale. 2013 ; Vol. 5, No. 5. pp. 2080-2088.
@article{e2eae903d10f4aa2ad5daf032e9a01e9,
title = "Highly compressed nanosolution restricted in cylindrical carbon nanospaces",
abstract = "We shed light on the specific hydration structure around a zinc ion of nanosolution restricted in a cylindrical micropore of single-wall carbon nanotube (SWNT) by comparison with the structure restricted in a cylindrical mesopore of multi-wall carbon nanotube (MWNT) and that of bulk aqueous solution. The average micropore width of open-pore SWNT was 0.87 nm which is equivalent to the size of a hydrated zinc ion having 6-hydrated water molecules. We could impregnate the zinc ions into the micropore of SWNT with negligible amounts of ion-exchanged species on surface functional groups by the appropriate oxidation followed by heat treatment under an inert condition. The results of X-ray absorption fine structure (XAFS) spectra confirmed that the proportion of dissolved species in nanospaces against the total adsorbed amounts of zinc ions on the open-pore SWNT and MWNT were 44 and 61{\%}, respectively, indicating the formation of a dehydrated structure in narrower nanospaces. The structure parameters obtained by the analysis of XAFS spectra also indicate that the dehydrated and highly compressed hydration structure can be stably formed inside the cylindrical micropore of SWNT where the structure is different from that inside the slit-shaped micropore whose pore width is less than 1 nm. Such a unique structure needs not only a narrow micropore geometry which is equivalent to the size of a hydrated ion but also the cylindrical nature of the pore.",
author = "Masayasu Nishi and Takahiro Ohkubo and Kazuma Tsurusaki and Atsushi Itadani and Bashir Ahmmad and Koki Urita and Isamu Moriguchi and Shigeharu Kittaka and Yasushige Kuroda",
year = "2013",
month = "3",
day = "7",
doi = "10.1039/c2nr33681b",
language = "English",
volume = "5",
pages = "2080--2088",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "5",

}

TY - JOUR

T1 - Highly compressed nanosolution restricted in cylindrical carbon nanospaces

AU - Nishi, Masayasu

AU - Ohkubo, Takahiro

AU - Tsurusaki, Kazuma

AU - Itadani, Atsushi

AU - Ahmmad, Bashir

AU - Urita, Koki

AU - Moriguchi, Isamu

AU - Kittaka, Shigeharu

AU - Kuroda, Yasushige

PY - 2013/3/7

Y1 - 2013/3/7

N2 - We shed light on the specific hydration structure around a zinc ion of nanosolution restricted in a cylindrical micropore of single-wall carbon nanotube (SWNT) by comparison with the structure restricted in a cylindrical mesopore of multi-wall carbon nanotube (MWNT) and that of bulk aqueous solution. The average micropore width of open-pore SWNT was 0.87 nm which is equivalent to the size of a hydrated zinc ion having 6-hydrated water molecules. We could impregnate the zinc ions into the micropore of SWNT with negligible amounts of ion-exchanged species on surface functional groups by the appropriate oxidation followed by heat treatment under an inert condition. The results of X-ray absorption fine structure (XAFS) spectra confirmed that the proportion of dissolved species in nanospaces against the total adsorbed amounts of zinc ions on the open-pore SWNT and MWNT were 44 and 61%, respectively, indicating the formation of a dehydrated structure in narrower nanospaces. The structure parameters obtained by the analysis of XAFS spectra also indicate that the dehydrated and highly compressed hydration structure can be stably formed inside the cylindrical micropore of SWNT where the structure is different from that inside the slit-shaped micropore whose pore width is less than 1 nm. Such a unique structure needs not only a narrow micropore geometry which is equivalent to the size of a hydrated ion but also the cylindrical nature of the pore.

AB - We shed light on the specific hydration structure around a zinc ion of nanosolution restricted in a cylindrical micropore of single-wall carbon nanotube (SWNT) by comparison with the structure restricted in a cylindrical mesopore of multi-wall carbon nanotube (MWNT) and that of bulk aqueous solution. The average micropore width of open-pore SWNT was 0.87 nm which is equivalent to the size of a hydrated zinc ion having 6-hydrated water molecules. We could impregnate the zinc ions into the micropore of SWNT with negligible amounts of ion-exchanged species on surface functional groups by the appropriate oxidation followed by heat treatment under an inert condition. The results of X-ray absorption fine structure (XAFS) spectra confirmed that the proportion of dissolved species in nanospaces against the total adsorbed amounts of zinc ions on the open-pore SWNT and MWNT were 44 and 61%, respectively, indicating the formation of a dehydrated structure in narrower nanospaces. The structure parameters obtained by the analysis of XAFS spectra also indicate that the dehydrated and highly compressed hydration structure can be stably formed inside the cylindrical micropore of SWNT where the structure is different from that inside the slit-shaped micropore whose pore width is less than 1 nm. Such a unique structure needs not only a narrow micropore geometry which is equivalent to the size of a hydrated ion but also the cylindrical nature of the pore.

UR - http://www.scopus.com/inward/record.url?scp=84874085157&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874085157&partnerID=8YFLogxK

U2 - 10.1039/c2nr33681b

DO - 10.1039/c2nr33681b

M3 - Article

VL - 5

SP - 2080

EP - 2088

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 5

ER -