Metastable nature of titanate nanotubes in an alkaline environment


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), 4421-4427. (doi:10.1021/cg100529y).

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Description/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.

Item Type: Article
ISSNs: 1528-7483 (print)
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 169715
Date Deposited: 21 Dec 2010 15:30
Last Modified: 28 Mar 2014 15:17
Research Funder: EPSRC
Projects:
The hydrothermal route to metal oxide nanotubes: synthesis and energy conversion application. A First Grant Proposal
Funded by: EPSRC (EP/F044445/1)
Led by: Dmitry V. Bavykin
15 September 2008 to 14 September 2010
URI: http://eprints.soton.ac.uk/id/eprint/169715

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