Kinetics of alkali metal ion exchange into nanotubular and nanofibrous titanates
Kinetics of alkali metal ion exchange into nanotubular and nanofibrous titanates
The kinetics of intercalation of Li+, Na+, K+ and Cs+ cations between the layers of titanate nanotubes and nanofibres have been studied in an aqueous suspension of nanotubes at 25ºC. The rate of intercalation was found to be similar for different cations and depended on the length of the nanotubes. The decrease in nanotube length resulted in a higher rate of ion-exchange, indicating that the transport of cations in titanate nanotubes occurred probably along their length. In contrast, the transport of cations in titanate nanofibres probably dominated in the direction perpendicular to length. Correlations between the rate of intercalation and the crystal structure modification following intercalation have been established for nanotubular and nanofibrous titanates.
diffusion coefficient, hydrothermal synthesis, nanomaterials, TiO2, titanates.
14644-14651
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
October 2007
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Bavykin, Dmitry V. and Walsh, Frank C.
(2007)
Kinetics of alkali metal ion exchange into nanotubular and nanofibrous titanates.
The Journal of Physical Chemistry C, 111 (40), .
(doi:10.1021/jp073799a).
Abstract
The kinetics of intercalation of Li+, Na+, K+ and Cs+ cations between the layers of titanate nanotubes and nanofibres have been studied in an aqueous suspension of nanotubes at 25ºC. The rate of intercalation was found to be similar for different cations and depended on the length of the nanotubes. The decrease in nanotube length resulted in a higher rate of ion-exchange, indicating that the transport of cations in titanate nanotubes occurred probably along their length. In contrast, the transport of cations in titanate nanofibres probably dominated in the direction perpendicular to length. Correlations between the rate of intercalation and the crystal structure modification following intercalation have been established for nanotubular and nanofibrous titanates.
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Published date: October 2007
Keywords:
diffusion coefficient, hydrothermal synthesis, nanomaterials, TiO2, titanates.
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 48933
URI: http://eprints.soton.ac.uk/id/eprint/48933
ISSN: 1932-7447
PURE UUID: 478413b4-3b19-4c2c-b4fc-34b258f76ed0
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Date deposited: 18 Oct 2007
Last modified: 15 Mar 2024 09:51
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