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Preparation of $TiO_2$ nanopowder using titanium tetra-isopropoxide and effect of pH  

임창성 (한서대학교 신소재공학과)
오원춘 (한서대학교 신소재공학과)
류정호 (한양대학교 세라믹공학과)
오근호 (한양대학교 세라믹공학과)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.12, no.2, 2002 , pp. 91-95 More about this Journal
Abstract
$TiO_2$ nanopowder was successfully prepared using a titanium tetra-isopropoxide. Subsequently, the effect of pH on the characteristics of the prepared $TiO_2$ nanopowder was evaluated depending on the amounts of the catalysts such as HCI and NH40H. The morphology and phase transformation of $TiO_2$ powder prepared by hydrolysis of titanium tetraisopropoxide were strongly influenced by the presence of the catalysts. In the case of using $NH_4$OH, the morphology of the $TiO_2$ powder exhibited powder form. For the HCI catalyst, it showed bulk or granule form. The phase transformations of amorphous $Ti(OH)_4$ to anatase $TiO_2$ and the anatase to rutile was significantly influenced by the kind and amount of the catalysts.
Keywords
$TiO_2$ nanopowder; Catalyst; pH; Phase transformation;
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