Metastable nature of titanate nanotubes in an alkaline environment
Metastable nature of titanate nanotubes in an alkaline environment
A systematic analysis of the effect of composition and temperature of a NaOH/KOH binary aqueous mixture on the morphological properties of titanate nanostructures formed under alkaline hydrothermal transformation of TiO2 at atmospheric conditions has been performed using HRTEM techniques. All observed nanostructures, including nanosheets, nanotubes, nanofibres and nanoparticles, have been mapped over a wide range of composition (from pure NaOH to pure KOH) and temperature (from 50 ºC to 110 ºC). Attempts to intensify the TiO2 transformation by addition of titanate nanotubes seeds or agitation of the reaction mixture have resulted in formation of thermodynamically stable nanofibres rather than nanotubes. The effects of kinetic and thermodynamic control of the reaction are discussed regarding the transformation of TiO2 to nanosheets, nanotubes and nanofibres.
4421-4427
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Kulak, Alexander N.
7dc57b4f-aae0-42a4-ae15-fd50ab6521c2
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
2010
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Kulak, Alexander N.
7dc57b4f-aae0-42a4-ae15-fd50ab6521c2
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Bavykin, Dmitry V., Kulak, Alexander N. and Walsh, Frank C.
(2010)
Metastable nature of titanate nanotubes in an alkaline environment.
Crystal Growth & Design, 10 (10), .
(doi:10.1021/cg100529y).
Abstract
A systematic analysis of the effect of composition and temperature of a NaOH/KOH binary aqueous mixture on the morphological properties of titanate nanostructures formed under alkaline hydrothermal transformation of TiO2 at atmospheric conditions has been performed using HRTEM techniques. All observed nanostructures, including nanosheets, nanotubes, nanofibres and nanoparticles, have been mapped over a wide range of composition (from pure NaOH to pure KOH) and temperature (from 50 ºC to 110 ºC). Attempts to intensify the TiO2 transformation by addition of titanate nanotubes seeds or agitation of the reaction mixture have resulted in formation of thermodynamically stable nanofibres rather than nanotubes. The effects of kinetic and thermodynamic control of the reaction are discussed regarding the transformation of TiO2 to nanosheets, nanotubes and nanofibres.
Text
2010-Metastable_Nature_of_Titanate_Nanotubes_in_an_Alkaline_Environment.pdf
- Version of Record
Restricted to Registered users only
Request a copy
More information
Published date: 2010
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 169715
URI: http://eprints.soton.ac.uk/id/eprint/169715
ISSN: 1528-7483
PURE UUID: c56feede-6b78-4e89-ba86-2b12fba68268
Catalogue record
Date deposited: 21 Dec 2010 15:30
Last modified: 14 Mar 2024 02:21
Export record
Altmetrics
Contributors
Author:
Alexander N. Kulak
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics