Influence of the neutralization process on the preparation of titanate nanotubes by hydrothermal synthesis

abstract

The influence of the neutralization process after hydrothermal synthesis on the structure and morphology of titanate nanotubes was investigated by X-ray diffraction, high-resolution transmission electron microscopy and Raman spectroscopy. Well formed nanotubes were obtained during the hydrothermal treatment of anatase in highly alkaline conditions. Synthesis at 150 degrees C led to the formation of layered titanate structure with the general formula Na2-xHxTi2O5 center dot 1.8 H2O, where x depends on pH. The tubular morphology is not dependent on the Na+/H+ ion exchange reaction.

keywords

TRITITANATE NANOTUBES; SOLAR-CELLS; TIO2; FEATURES; CARBON

subject category

Chemistry; Materials Science

authors

Maxim, F; Ferreira, P; Vilarinho, PM

our authors

acknowledgements

The authors acknowledge FCT, FEDER and FAME Network. FM is grateful to FCT for the fellowship SFRH/BD/23375/2005.

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