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Preparation of Highly Crystalline TiO 2 Nanostructures by Acid-assisted Hydrothermal Treatment of Hexagonal structured Nanocrystalline Titania/Cetyltrimethyammonium Bromide Nanoskeleton
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Preparation of Highly Crystalline TiO 2 Nanostructures by Acid-assisted Hydrothermal Treatment of Hexagonal structured Nanocrystalline Titania/Cetyltrimethyammonium Bromide Nanoskeleton  
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Highly crystalline TiO2 nanostructures were prepared through a facile inorganic acid-assisted hydro- thermal treatment of hexagonal-structured assemblies of nanocrystalline titiania templated by cetyltrimethylammo- nium bromide (Hex-ncTiO2/CTAB Nanoskeleton) as start- ing materials. All samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The influence of hydrochloric acid concentration on the morphology, crystalline and the formation of the nano- structures were investigated. We found that the morphology and crystalline phase strongly depended on the hydrochloric acid concentrations. More importantly, crystalline phase was closely related to the morphology of TiO2 nanostruc- ture. Nanoparticles were polycrystalline anatase phase, and aligned nanorods were single crystalline rutile phase. Pos- sible formation mechanisms of TiO2 nanostructures with various crystalline phases and morphologies were proposed.
Journal: Nanoscale Research Letters - NANOSCALE RES LETT , vol. 2010, 5:18, no. 9, 2010
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