Photocatalytic oxidation of ethylene to CO{sub 2} and H{sub 2}O on ultrafine powdered TiO{sub 2} photocatalysts in the presence of O{sub 2} and H{sub 2}O
- KOGAS, Ansan (Korea, Republic of). Div. of Gas Utilization
- Osaka Prefecture Univ., Sakai, Osaka (Japan). Dept. of Applied Chemistry
The complete photocatalytic oxidation of C{sub 2}H{sub 4} with O{sub 2} into CO{sub 2} and H{sub 2}O has been achieved on ultrafine powdered TiO{sub 2} photocatalysts and the addition of H{sub 2}O was found to enhance the reaction. The details of the photocatalytic reaction have been studied by IR, ESR, and analysis of the reaction products. UV irradiation of the photocatalysts at 275 K led to the photocatalytic oxidation of C{sub 2}H{sub 4} with O{sub 2} into CO{sub 2}, CO, and H{sub 2}O. The large surface area of the photocatalyst is one of the most important factors in achieving a high efficiency in the photocatalytic oxidation of C{sub 2}H{sub 4}. The photo-formed OH species as well as O{sub 2}{sup {minus}} and O{sub 3}{sup {minus}} anion radicals play a significant role as a key active species in the complete photocatalytic oxidation of C{sub 2}H{sub 4} with O{sub 2} into CO{sub 2} and H{sub 2}O.
- OSTI ID:
- 684569
- Journal Information:
- Journal of Catalysis, Vol. 185, Issue 1; Other Information: PBD: 1 Jul 1999
- Country of Publication:
- United States
- Language:
- English
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