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

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

doi:10.1016/j.apcatb.2015.10.034

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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

108 Citations (Scopus)

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.

Original language	English
Pages (from-to)	107-112
Number of pages	6
Journal	Applied Catalysis B: Environmental
Volume	183
DOIs	https://doi.org/10.1016/j.apcatb.2015.10.034
Publication status	Published - Apr 2016

Keywords

Selective photo-oxidation
Ultrasound-assisted impregnation
TiO2
Aromatic alcohols
Magnetic photocatalysts
AROMATIC ALCOHOLS
PHOTOCATALYTIC OXIDATION
ORGANIC TRANSFORMATIONS
LIGHT IRRADIATION
RUTILE TIO2
ALDEHYDES
WATER
PHOTOREACTIVITY
NANOPARTICLES
VALORIZATION

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10.1016/j.apcatb.2015.10.034

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@article{05e2fbd89bc542e9a314ddc4bfbd4043,

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

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.",

keywords = "Selective photo-oxidation, Ultrasound-assisted impregnation, TiO2, Aromatic alcohols, Magnetic photocatalysts, AROMATIC ALCOHOLS, PHOTOCATALYTIC OXIDATION, ORGANIC TRANSFORMATIONS, LIGHT IRRADIATION, RUTILE TIO2, ALDEHYDES, WATER, PHOTOREACTIVITY, NANOPARTICLES, VALORIZATION",

author = "Colmenares, {Juan C.} and Weiyi Ouyang and Manuel Ojeda and Ewelina Kuna and Olga Chernyayeva and Dmytro Lisovytskiy and Sudipta De and Rafael Luque and Balu, {Alina M.}",

year = "2016",

month = apr,

doi = "10.1016/j.apcatb.2015.10.034",

language = "English",

volume = "183",

pages = "107--112",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

}

TY - JOUR

T1 - Mild ultrasound-assisted synthesis of TiO2 supported on magnetic nanocomposites for selective photo-oxidation of benzyl alcohol

AU - Colmenares, Juan C.

AU - Ouyang, Weiyi

AU - Ojeda, Manuel

AU - Kuna, Ewelina

AU - Chernyayeva, Olga

AU - Lisovytskiy, Dmytro

AU - De, Sudipta

AU - Luque, Rafael

AU - Balu, Alina M.

PY - 2016/4

Y1 - 2016/4

N2 - 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.

AB - 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.

KW - Selective photo-oxidation

KW - Ultrasound-assisted impregnation

KW - TiO2

KW - Aromatic alcohols

KW - Magnetic photocatalysts

KW - AROMATIC ALCOHOLS

KW - PHOTOCATALYTIC OXIDATION

KW - ORGANIC TRANSFORMATIONS

KW - LIGHT IRRADIATION

KW - RUTILE TIO2

KW - ALDEHYDES

KW - WATER

KW - PHOTOREACTIVITY

KW - NANOPARTICLES

KW - VALORIZATION

U2 - 10.1016/j.apcatb.2015.10.034

DO - 10.1016/j.apcatb.2015.10.034

M3 - Article

SN - 0926-3373

VL - 183

SP - 107

EP - 112

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

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

Abstract

Keywords

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