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Aerobic Oxidation of Alcohols Catalyzed by V 2 O 5 Rods Decorated on Graphene Oxide
Author(s) -
Anbu Nagaraj,
Ruby Kamalam Maniveldoss Beaula,
Sethuraman Kunjithapatham,
Dhakshinamoorthy Amarajothi
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802811
Subject(s) - catalysis , benzyl alcohol , graphene , scanning electron microscope , oxide , materials science , benzaldehyde , fourier transform infrared spectroscopy , nanocomposite , chemical engineering , raman spectroscopy , nuclear chemistry , chemistry , organic chemistry , nanotechnology , composite material , physics , optics , engineering , metallurgy
The present work reports the preparation of two different nanocomposites, namely, 5 wt% V 2 O 5 rods supported on graphene oxide (GO) (GV1) and 10 wt% V 2 O 5 rods supported on GO (GV2). These nanocomposites are prepared by mixing V 2 O 5 precursor and GO suspension with the assistance of sonication method as a non conventional source of energy. The structural features of these nanocomposites are characterized by powder X‐ray diffraction (XRD), Fourier transform‐infrared spectroscopy (FT‐IR), Raman, scanning electron microscope (SEM), transmission electron microscope (TEM), atomic force microscope (AFM) and UV‐Visible spectroscopy. These analyses confirm the existence of V 2 O 5 rods decorated on GO sheets. Furthermore, the catalytic activity of these nanocomposites is examined in the aerobic oxidation of benzyl alcohol under mild reaction conditions. The observed catalytic data indicate that the present experimental conditions afford complete conversion of benzyl alcohol with 100% selectivity to benzaldehyde with GV2 as a solid catalyst. On the other hand, this catalyst is also effective to promote secondary alcohol oxidation to its corresponding carbonyl compound, thus demonstrating wide substrate scope. The reusability experiments indicate that the activity is decreased in consecutive recycles in the aerobic oxidation of benzyl alcohol. On the other hand, the process is heterogeneous in nature as evidenced by hot filtration experiment.