Mild ultrasound-assisted synthesis of TiO2 supported on magnetic nanocomposites for selective photo-oxidation of benzyl alcohol
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Author
Colmenares, Juan C.
Ojeda, Manuel
Kuna, Ewelina
Chernyayeva, Olga
Lisovytskiy, Dmytro
Balu, Alina M.
Luque, Rafael
De, Sudipta
Ouyang, Weiyi
Publisher
ElsevierDate
2016Subject
Selective photo-oxidationUltrasound-assisted impregnation
TiO2
Aromatic alcohols
Magnetic photocatalysts
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A simple and effective ultrasound-assisted wet impregnation method was developed for the
preparation of magnetically separable TiO2/maghemite-silica photo-active nanocomposites. The
resulting nanomaterials were characterized by several techniques and subsequently tested for
their photocatalytic activities in the liquid phase selective oxidation of benzyl alcohol. An
unprecedented selectivity in organic media (90% in acetonitrile) towards benzaldehyde was
achieved at a benzyl alcohol conversion of ca. 50%, being remarkably superior in terms of
activity to any other supported transition metal catalysts reported to date as well as commercial
titania Evonik P-25 photocatalyst.