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The Study Of Semiconductor Oxide/H2O2/UV System As A Photocatalytic System For Deoximation: The Effect Of Some Operational Parameters

M.Montazerozohori, B.Karami, S.Joohari

In this report titanium dioxide(anatase and rutile) and zinc oxide as semiconductor oxides are used as photocatalysts while hydrogen peroxide is auxilary oxidant. A variety of oximes were converted to their carbonyl compounds in the present of photocatalysts with hydrogenperoxide under UV-irradiation by 400W high pressure mercury lamp. The observed results revealed that the order of photocatalytic activity for deoximation was ZnO>TiO2(rutile)> TiO2(anatase). The effect of some other physicochemical parameters such as amount of photocatalyst, solvent and time of irradiation were studied. The carbonyl compounds were regenerated from the related oximes after 14-22h. The results showed the photostability of this type of compounds.