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[A-2.7 Photodegradation of 1,1-difluoroethane]

[Fellow]
Benchang Sangchakr
Department of Chemistry, King Mongkut's Institute of Technology
Thonburi, Bangkok 10140, Thailand.

[Contact Person]

Keiichi Tanaka
National Institute of Materials and Chemical Research
Higashi 1-1, Tsukuba, Ibaraki, 305 Japan
Tel: +81-298-54-4563, Fax: +81-298-54-4487

[Total Budget for FY1995]

4,991,000Yen

[Abstract]

　The photocatalytic degradation of 1,1-difluoroethane on the surface of Ti0₂ has been studied at λ = 254 nm. The degradation rate is found to be about the same as direct photolysis at λ = 185 nm. Furthermore, the degradation rate decreases when the Ti0₂ / Si0₂ is used as the catalyst. The reactions, photolysis and photocatalysis, follow the first order kinetic. The degradation products have been analyzed by FT-IR and GC /MS. The reaction path ways are proposed on the basis of degradation products found in this work.

[Key Words]

Photolysis, Photocatalyst, TiO₂, Intermediate