수중 Trichloroethylene의 광촉매 분해특성에 관한 연구 = Photocatalytic Degradation of Trichloroethylene in Aqueous Phase

다국어 초록 (Multilingual Abstract)

The photocatalytic degradation of trichloroethylene (TCE) in TiO2 aqueous suspension has been studied. TiO2 photocatalysts are prepared by a sol-gel method. The dominant anatase-structure on TiO2 particles is observed after calcining the TiO2 gel at 500℃ for 1hr. The Langmuir-Hinshelwood model is applicable to describe the photodegradation, which indicates that adsorption of the solute on the surface of TiO2 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 TiO2 including Pt, Pd and Nd are lower than pure TiO2 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.

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