Photocatalytic degradation and reaction pathway studies of chlorinated hydrocarbons in gaseous phase

• Main Authors: Wan Abu Bakar, Wan Azelee, Ali, Rusmidah, Othman, Mohd. Yusuf
• Format: Article
• Language: English
• Published: Sharif University of Technology 2010
• Subjects: Q Science
• Online Access: http://eprints.utm.my/id/eprint/26627/1/WanAzeleeWan2010_PhotocatalyticDegradationandReactionPathwayStudies.pdf; http://eprints.utm.my/id/eprint/26627/; http://scientiairanica.sharif.edu/article_3297.html

TiO2 was doped with various types of first row transition metals towards the degradation of dichloromethane, chloroform, carbon tetrachloride and a mixture of carbon tetrachloride and chloroform. Zn2+/Fe3+/TiO2 photocatalyst with the ratio of 0.0005: 0.0005: 1 was revealed as the best catalyst in this study. 41.05% of dichloromethane, 49.45% of chloroform and 37.84% of carbon tetrachloride were degraded by this catalyst in the presence of UV light (6 W, 354 nm), irradiated for 90 minutes, and oxidized VOCs gases were analyzed using GC-FID. In this study, the new species of CHCl+2, CH2Cl+, CCl+2 and OCl+. CHCl+2 was detected to form from the photocatalytic degradation of chloroform while some new fragments, such as OCl+, CHCl+2 and CH2Cl+, are observed during the photocatalytic degradation of carbon tetrachloride.