photocatalytic degradation of metoxuron in aqueous suspensions of tio2. analytical and kinetic studies
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ID: 165528
2002
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Abstract
The photocatalytic degradation of metoxuron [3-(3-chloro-4-methoxyphenyl)-1,1-dimethylurea]
in aqueous suspensions of TiO2 was investigated. Several intermediate photoproducts were identified using
NMR and MS techniques. Oxidation or removal of the methyl of terminal nitrogen and ring hydroxylation were
found to occur. 2-Propanol was shown to decrease the rate of photocatalytic degradation, inhibiting partly
ring hydroxylation and completely reactions on terminal nitrogen. In contrast, basification of the suspensions
accelerated the degradation significantly. Degussa P25 TiO2 was found to exhibit a higher photocatalytic
activity than Millennium TiO2 in spite of a generally smaller specific surface area. Within the Millennium
TiO2 series, the photocatalytic efficiency increased with the specific surface area.
| Reference Key |
khodja2002internationalphotocatalytic
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|---|---|
| Authors | ;Amina Amine Khodja;Bernadette Lavedrine;Claire Richard;Tahar Sehili |
| Journal | construction and building materials |
| Year | 2002 |
| DOI |
10.1155/S1110662X0200017X
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| URL | |
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