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http://dx.doi.org/10.7316/khnes.2011.22.3.349

The Property of TiO2 Powder Made with a 1000rpm MA Machine  

Lee, Yong-Bok (Korea Atomic Energy Research Institute)
Kwon, Jun-Hyun (Korea Atomic Energy Research Institute)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.22, no.3, 2011 , pp. 349-356 More about this Journal
Abstract
During the process of synthesis of $TiO_2$ powders using a high-speed planetary milling machine, Fe metallic powders were created which could be dissolved in sulfuric acid solution. With adding $NH_4OH$ solution to the $TiO_2$ powder, it was found that the crystal structure of the synthesized powder did not change and the crystal size decreased slightly. However, when the sulfur powder is mixed with $TiO_2$, the crystal structure of the MA powder was changed from anatase into rutile phase and its size decreased significantly which is in the order of nm in diameter. In case of mechanical alloying with $TiO_2$ powder only, the crystal structure of the powder was transformed into rutile phase and its size was greatly reduced into several nm. Because its size becomes fine, the energy band gap of its rutile phase is larger than that of bulk states (3.0eV).
Keywords
$TiO_2$; Photocatalyst; Ball milling; Band gap; Absorbance; UV-Vis;
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Times Cited By KSCI : 1  (Citation Analysis)
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