Formation of Nanotubule, Nanorod and Polycrystalline Nanoparticles TiO2 by Alkaline Hydrothermal Transformation of Anatase TiO2

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Nanostructured titanium oxides with various morphologies were prepared through the hydrothermal treatment of TiO2 anatase, using LiOH, NaOH and KOH as a peptizing agent at 400 K for 30 hrs. The obtained samples were characterized using the scanning electron microscopy, transmission electron microscopy, X-ray diffraction, BET measurement and the electron spin resonance spectroscopy. The observed morphologies such as tubule, partially plugged nanorod and polycrystalline nanoparticles can be tailored depending on the types of alkali metal ion, Na+, K+, and Li+ used in the hydrothermal treatments. The result of the ESR studies suggested the existence of paramagnetic sites on the annealed nanostructured TiO2 samples. The ESR signals came from the single electron trapped in oxygen vacancy (SETOV) and Ti3+.


Document Type: Research Article


Publication date: May 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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