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Visible‐Light‐Induced Efficient Selective Oxidation of Nonactivated Alcohols over {001}‐Faceted TiO 2 with Molecular Oxygen
Author(s) -
Vadakkekara Raji,
Biswas Abul Kalam,
Sahoo Tapan,
Pal Provas,
Ganguly Bishwajit,
Ghosh Subhash Chandra,
Panda Asit Baran
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201601064
Subject(s) - photochemistry , catalysis , selectivity , anatase , visible spectrum , reactivity (psychology) , alcohol oxidation , nanocrystalline material , oxygen , chemistry , absorption (acoustics) , alcohol , molecular oxygen , materials science , photocatalysis , organic chemistry , crystallography , optoelectronics , medicine , alternative medicine , pathology , composite material
In the presence of molecular oxygen, a {001}‐faceted nanocrystalline anatase TiO 2 catalyst enabled the selective oxidation of nonactivated aliphatic alcohols to the corresponding aldehydes or ketones under visible light. The reaction shows excellent conversion and selectivity towards the formation of the carbonyl products without over‐oxidation to the corresponding carboxylic acids. The exceptional reactivity of the catalyst is possibly due to the absorption of visible light originating from a stronger interaction of alcohol with the {001} facet, which facilitates the modification of the band structure of TiO 2 , thus facilitating the photogenerated hole transfer and subsequent oxidation processes. The experimental results have also been corroborated by first‐principles quantum chemical DFT calculations.