Abstract
Modification of nano-WO3 with -SO3 H groups as a covalently grafted solid acid reduced its band-gap energy from 2.8 to 2.4eV and made it an ideal nominee for photocatalytic reaction under visible light irradiation. This nano-photocatalyst has been successfully used for the selective oxidation of different benzyl alcohols to corresponding aldehydes under blue LED irradiation. The reaction became approximately two times faster with excellent yields. It has shown that the nitrobenzene as an available industrial oxidant is applicable for photocatalytic oxidation of benzyl alcohol; remarkably high yield and selectivity have been observed.
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