수중 Trichloroethylenel의 광촉매 분해특성에 관한 연구

Photocatalytic Degradation of Trichloroethylene in Aqueous Phase

  • 발행 : 2011.08.15

초록

The photocatalytic degradation of trichloroethylene (TCE) 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 $TiO_2$ get at $500^{\circ}C$ for 1hr. The Langmuir-Hinshelwood model is applicable to describe the photodegradation, which indicates that adsorptionof the solute on the surface of $TiO_2$ particles plays an important role in photodegradation. 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, Pd and Nd are lower than pure $TiO_2$ powder. The effect of pH is investigated and the maximum photodegradation efficiency is obtained at pH 7. In addition, the intermediates such as dichloromethane, chloroform, and trichloroethane are detected during the photodegradation of TCE.

키워드

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