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Photocatalytic Degradation of Dibenzothiophene in Aqueous Phase  

Jo, Sung-Hye (부경대학교 환경공학과)
Yoe, Seok-Jun (부경대학교 환경공학과)
Kim, Il-Kyu (부경대학교 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.25, no.4, 2011 , pp. 527-534 More about this Journal
Abstract
In this research, the photocatalytic degradation of dibenzothiophene (DBT) in $TiO_2$ aqueous suspension has been studied. $TiO_2$ photocatalysts are prepared by a sol-gel method. The dominant anatase-structure on $TiO_2$ particles is observed after calcining the $TiO_2$ gel at $500^{\circ}C$ for 1hr. Photocatalysts with various transition metals (Nd, Pd and Pt) loading are tested to evaluate the effect of transition metal impurities on photodegradation. The photodegradation efficiencies with $TiO_2$ including Pt and Pd are higher than pure $TiO_2$ powder. Also we investigated the applicability of $H_2O_2$ to increase the efficiency of the $TiO_2$ photocatalytic degradation of dibenzothiophene. The degradation efficiency increases with increasing dosage of $H_2O_2$ in the range of 0.01M to 0.1M . The effect of pH is investigated; we obtained the maximum photodegradation efficiency at pH 5. In addition, the intermediate analysis found dihydroxyl -dibenzothiophene as a reaction intermediate of dibenzothiophene during the photodegradation.
Keywords
dibenzothiophene; photodegradation; trasition metals; intermediate;
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