The liquid-phase photo-oxidation of ethylbenzene (EB) is investigated in solar light with air/O2/N2 at atmospheric pressure, in a batch reactor using acetonitrile medium. It is carried out over TiO2 doped with C, N, and S (TCNS) photocatalyst samples. The photocatalytic oxidation yielded acetophenone (33%) and 1-phenylethanol (21%) at 56% conversion of EB during a 6-h irradiation time. This product distribution indicates that C–H bond activation has occurred only at the alkyl chain. The effects of the EB to water content ratio, amount of photocatalyst and its sustainability, pH, have been studied. It is illustrated that the reaction carried out by this environmentally friendly photocatalysis is truly heterogeneous under mild conditions using solar light and no waste generation. An optimum loading of TCNS5 was observed for the photo-oxidation of EB.
Research on Chemical Intermediates – Springer Journals
Published: Mar 9, 2011
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