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- E-ISSN 2288-8985
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- P-ISSN1225-0163
- E-ISSN2288-8985
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Article Detail
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Reaction morphology depending on the amounts of HCl and NH<sub>4</sub>OH and effect of pH on the preparation of TiO<sub>2</sub> nanopowder
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2007, v.20 no.4, pp.302-307
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(2007). Reaction morphology depending on the amounts of HCl and NH<sub>4</sub>OH and effect of pH on the preparation of TiO<sub>2</sub> nanopowder. Analytical Science and Technology, 20(4), 302-307.
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Abstract
The reaction morphology was investigated depending on the amounts of HCl and <TEX>$NH_4OH$</TEX>, and the effect of pH was studied on the preparation of <TEX>$TiO_2$</TEX> nanopowders. <TEX>$TiO_2$</TEX> nanopowder was prepared using a titanium tetra-isopropoxide. Subsequently, the effect of pH on the characteristics of the prepared <TEX>$TiO_2$</TEX> nanopowder was evaluated depending on the amounts of the catalysts such as HCl and <TEX>$NH_4OH$</TEX>. The morphology and phase transformation of <TEX>$TiO_2$</TEX> powder prepared by hydrolysis of titanium tetra-isopropoxide were strongly influenced by the presence of the catalysts. In the case of using <TEX>$NH_4OH$</TEX>, the morphology of the <TEX>$TiO_2$</TEX> powder exhibited powder form. For the HCl catalyst, it showed bulk or granule form. The phase transformations of amorphous <TEX>$Ti(OH)_4$</TEX> to anatase <TEX>$TiO_2$</TEX> and the anatase to rutile was significantly influenced by the kind and amount of thecatalysts.
- keywords
- Reaction morphology, <TEX>$TiO_2$</TEX> nanopowder, catalyst, pH
Reference
1
Tai, (1993) Proceedings of ISES Solar World Congress Budapest,
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