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

Research output: Contribution to journalArticle

66 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 languageEnglish
Pages (from-to)107-112
Number of pages6
JournalApplied Catalysis B: Environmental
Volume183
DOIs
Publication statusPublished - 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

Cite this