Mild ultrasound-assisted synthesis of TiO2 supported on magnetic nanocomposites for selective photo-oxidation of benzyl alcohol

Colmenares, Juan Carlos; Ouyang, Weiyi; Ojeda, Manuel; Kuna, Ewelina; Chernyayeva, Olga; Lisovytskiy, Dmytro; De, Sudipta; Luque, Rafael; Balu, Alina M.

Author

Colmenares, Juan Carlos

Ouyang, Weiyi

Ojeda, Manuel

Kuna, Ewelina

Chernyayeva, Olga

Lisovytskiy, Dmytro

De, Sudipta

Luque, Rafael

Balu, Alina M.

Publisher

Elsevier

Date

2015

Subject

Selective photo-oxidation
Ultrasound-assisted impregnation
TiO2
Aromatic alcohols
Magnetic photocatalysts

Abstract

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.

URI

http://hdl.handle.net/10396/35532

Fuente

Juan C. Colmenares, Weiyi Ouyang, Manuel Ojeda, Ewelina Kuna, Olga Chernyayeva, Dmytro Lisovytskiy, Sudipta De, Rafael Luque, Alina M. Balu, Mild ultrasound-assisted synthesis of TiO2 supported on magnetic nanocomposites for selective photo-oxidation of benzyl alcohol, Applied Catalysis B: Environmental, Volume 183, 2016, Pages 107-112, ISSN 0926-3373, https://doi.org/10.1016/j.apcatb.2015.10.034.

Versión del Editor

https://doi.org/10.1016/j.apcatb.2015.10.034