Abstract
The photocatalytic oxidation of benzyl alcohol and its derivatives, such as 4-methoxybenzyl alcohol, 4-chlorobenzyl alcohol, 4-nitrobenzyl alcohol, 4-methylbenzyl alcohol, 4-(trifluoromethyl)benzyl alcohol, and 4- tertiary-butylbenzyl alcohol, into corresponding aldehydes proceeded at high conversion and selectivity on a TiO 2 photocatalyst under O 2 atmosphere. The reaction was confirmed to proceed under irradiation with both UV-light and visible light. In particular, the visible light response was observed to be attributed to a characteristic surface complex formed by the adsorption of a benzyl alcoholic compound on the TiO 2 surface. Here, the properties of the surface complex as the active center for this selective photocatalytic oxidation and the mechanism behind the reaction have been investigated.
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