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Synthesis and Thermal Analyses of TiO2-Derived Nanotubes Prepared by the Hydrothermal Method

Published online by Cambridge University Press:  03 March 2011

Yoshikazu Suzuki  and
Susumu Yoshikawa
Yoshikazu Suzuki*
Affiliation:
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
Susumu Yoshikawa
Affiliation:
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

TiO2-derived nanotubes were prepared by hydrothermal treatment of TiO2 powder in NaOH aqueous solution. High-temperature x-ray diffraction (HT-XRD) andthermogravimetry-differential thermal analysis (TG-DTA) demonstrated the formation of TiO2 (B) phase (a metastable polymorph of titanium dioxide) from the nanotubes under heating at ∼800 °C, which indicates the as-prepared nanotubes should be composed of layered titanate, most probably as H2Ti3O7·nH2O (n < 3). Dehydration behavior and phase transformation confirmed by the HT-XRD study have suggested reliable reaction path and have well-solved the contradictions on the nanotube-formation mechanism among previous studies.

Keywords

HydrothermalNanoscaleCeramic
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 4 , April 2004 , pp. 982 - 985
Copyright
Copyright © Materials Research Society 2004

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