Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 68, Issue 4, Pages 628-637Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2007.02.011
Keywords
X-ray diffraction
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Fine titanium dioxide particles were hydrothermally treated in a sodium hydroxide aqueous solution. The treatment extended from I to 6 days leading to belt-like and wire-like structures of a metastable phase of sodium titanate, with typical widths and diameters between 8 and 40nm, and lengths from 100nm to several micrometers. These conclusions are supported by X-ray photoclectron spectroscopy, X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. The latter method revealed two set of space fringes with characteristic distances of 0.29 and 0.34nm. These distances could correspond to the lattice spacing of [-3 1 1] and [-1 1 1] planes in Na2Ti6O13 compounds. The nanomaterial was found to be stable up to temperatures as high as 200 or 400 degrees C depending on the reaction time and the concentration. (c) 2007 Elsevier Ltd. All rights reserved.
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