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Photocatalytic Decomposition of Gaseous Acetaldehyde by Metal Loaded $TiO_2$ with Ozonation

Cho, Ki-Chul   (Department of Environmental Science, DongNam Health CollegeUU0000455  ); Yeo, Hyun-Gu   (Department of Environmental Engineering, National Hankyong University  );
  • 초록

    The decomposition of gaseous $CH_3CHO$ was investigated by metal loaded $TiO_2$ (pure $TiO_2,\;Pt/TiO_2,\;Pd/TiO_2,\;Mn/TiO_2\;and\;Ag/TiO_2$ ) with $UV/TiO_2$ process and $UV/TiO_2/O_3$ process at room temperature and atmospheric pressure. Metal loaded $TiO_2$ was prepared by photodeposition. Decomposition of $CH_3CHO$ was carried out in a flow-type photochemical reaction system using three 10W black light lamps ( $300{\sim}400nm$ ) as a light source. The experimental results showed that the degradation rate of $CH_3CHO$ was increased with Pt and Ag on $TiO_2$ compared to pure $TiO_2$ , but decreased with depositing Pd and Mn on pure $TiO_2$ . The considerable increase in the degradation efficiency of the $CH_3CHO$ was found by a combination of photocatalysis and ozonation as compared to only by ozonation or photocatalysis. Loading of Pt on $TiO_2$ promoted conversion of gaseous ozone. The degradation rate of gaseous $CH_3CHO$ decreased with an increase of water vapor in the feed stream for the both $UV/TiO_2\;and\;UV/TiO_2/O_3$ processes. The pure $TiO_2$ was more affected by the water vapor than Pt loaded $TiO_2$ .


  • 주제어

    $CH_3CHO$ .   Photodeposition .   $Pt/TiO_2$ .   $Pd/TiO_2$ .   Photocatalysis .   Ozonation.  

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  • 이 논문을 인용한 문헌 (1)

    1. Kim, Kyoung-Jin ; Park, Ok-Hyun 2008. "A Comparative Study on Degradation of BTEX Vapor by O3/UV, TiO2/UV, and O3/TiO2/UV System with Operating Conditions" 한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, 24(1): 91~99     

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