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VOC gas의 광분해를 위한 TiO₂-coated film의 합성과 특성에 관한 연구
노준형,김영홍,류봉기 부산대학교 환경문제연구소 1999 環境硏究報 Vol.17 No.1
The photocatalyst of TiO_2 coated onto glass bead was prepared from sol-gel method. The solids were characterized by X-ray diffraction (XRD), specific surface area (BET), and scanning electron microscopy observation (SEM). The gas-phase photocatalytic degradation of trichloroethylene (TCE) and benzene with coated TiO_2 on glass beads was investigated using a fixed bed reactor. At steady state, conversion yields were obtained for trichloroethylene (ca. 82%) in 400 ppm concentration and benzene (ca. 65%) in 300 ppm. In order to compare the TiO_2 powder for the photocatalytic reaction efficiency, two different powders were used. To obtain higher efficiency, it was the primary factor to select the TiO_2 powder. Through the experiments, the photocatalytic degradation had the behavior of Langmuir-Hinshelwood kinetics as function of reaction time.