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Low-temperature synthesis of titanate nanotubes in aqueous KOH

Low-temperature synthesis of titanate nanotubes in aqueous KOH
Low-temperature synthesis of titanate nanotubes in aqueous KOH
Although hydrothermal alkaline treatment of TiO2 in a concentrated, aqueous solution of KOH usually results in the formation of solid fibrous titanates, analysis of the temperature dependence of Ti(iv) concentration in KOH solution and comparison of these data with that for NaOH solution suggests that, at low temperatures, the treatment of TiO2 with KOH may result in formation of titanate nanotubes. This result was confirmed by 12 days treatment of TiO2 in 10 mol dm?3 KOH at 56?C, resulting in the formation of nanotubular titanates with similar morphology to those produced in a shorter time at higher temperatures using NaOH.The mechanism of nanotube formation and the necessary conditions of nanotube phase formation are considered.
0004-9425
95-98
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Cressey, Barbara A.
55c72b25-9179-4338-ac8f-c71f7613d44e
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Cressey, Barbara A.
55c72b25-9179-4338-ac8f-c71f7613d44e
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2

Bavykin, Dmitry V., Cressey, Barbara A. and Walsh, Frank C. (2007) Low-temperature synthesis of titanate nanotubes in aqueous KOH. Australian Journal of Chemistry, 60 (2), 95-98. (doi:10.1071/CH06359).

Record type: Article

Abstract

Although hydrothermal alkaline treatment of TiO2 in a concentrated, aqueous solution of KOH usually results in the formation of solid fibrous titanates, analysis of the temperature dependence of Ti(iv) concentration in KOH solution and comparison of these data with that for NaOH solution suggests that, at low temperatures, the treatment of TiO2 with KOH may result in formation of titanate nanotubes. This result was confirmed by 12 days treatment of TiO2 in 10 mol dm?3 KOH at 56?C, resulting in the formation of nanotubular titanates with similar morphology to those produced in a shorter time at higher temperatures using NaOH.The mechanism of nanotube formation and the necessary conditions of nanotube phase formation are considered.

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Published date: 2007
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 46067
URI: http://eprints.soton.ac.uk/id/eprint/46067
ISSN: 0004-9425
PURE UUID: 8cb07f46-9187-4ac6-bd82-5e66c5d0f2f0

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Date deposited: 17 May 2007
Last modified: 15 Mar 2024 09:16

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Contributors

Author: Barbara A. Cressey
Author: Frank C. Walsh

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