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Synthesis of Pure Brookite-type TiO2 Nanoparticles from Aqueous TiCl4 Solution with controlled Acidity by Precipitation Method  

Lee, Jeong Hoon (Department of Chemical Engineering, Woosuk University)
Yang, Yeong Seok (Department of Pharmaceutical Engineering, Woosuk University)
Publication Information
Applied Chemistry for Engineering / v.18, no.6, 2007 , pp. 545-551 More about this Journal
Abstract
HCl concentration, reaction temperature, and $Ti^{4+}$ concentration are the decisive factors in determining the structure of precipitates in the process of synthesis of $TiO_2$ particles from aqueous $TiCl_4$ solution by precipitation and the volumetric proportion of brookite phase in $TiO_2$ particles can be controlled by these factors. Pure brookite-type $TiO_2$ nanoparticles were synthesized by heating the aqueous $TiCl_4$ solution with no more than 1.0 M of $Ti^{4+}$, in which the concentration of HCl was kept in the range of about 2.53~6.41 M during reaction, at the temperature below $70^{\circ}C$ for 20 h. Also, Pure brookite was finally transformed to a rutile phase via an anatase phase through heat-treatment.
Keywords
$TiCl_4$; acidity; pure brookite; precipitation; $TiO_2$;
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