TITLE:
Synthesis and Characterization of Iron Oxide Nanoparticles Supported on Ziconia and Its Application in the Gas-Phase Oxidation of Cyclohexanol to Cyclohexanone
AUTHORS:
Mohammad Sadiq, Gul Zamin, Razia , Mohammad Ilyas
KEYWORDS:
Iron Oxide; Nanoparticles; Magnetite; Cyclohexanol
JOURNAL NAME:
Modern Research in Catalysis,
Vol.3 No.1,
January
14,
2014
ABSTRACT: Iron oxide
nanoparticles supported on zirconia were prepared by precipitation-deposition
method and characterized by XRD, SEM, FT-IR, TGA/DTA, surface area and particle
size analysis. Catalytic activities of the catalysts were tested in the
gas-phase conversion of cyclohexanol in a fixed-bed flow type, Pyrex glass
reactor, at 433 - 463 K. Major detected products were cyclohexanone,
cyclohexene and benzene, depending on the used catalyst. The rate of reaction
was significantly raised by the introduction of molecular oxygen in the feed
gas, thereby suggesting the oxidation of cyclohexanol to cyclohexanone.
Furthermore, the catalytic activity of iron oxide nanoparticles supported on
zirconia treated with hydrogen at 553 K for 2 hours, was more selective and
better than the unreduced iron oxide nanoparticles supported on zirconia, in
the gas-phase oxidation of cyclohexanol to cyclohexanone. Experimental results
showed that there was no leaching of metal, and that the catalyst was thus truly
heterogeneous.