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Effect of Microwave Irradiation Parameters on Co/Fe Hydrotalcite Nanocatalysts for the Total Oxidation of VOCs
Author(s) -
Serhal Cynthia Abou,
Mallard Isabelle,
Poupin Christophe,
Labaki Madona,
Siffert Stéphane,
Cousin Renaud
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201801528
Subject(s) - nanomaterial based catalyst , chemistry , hydrotalcite , catalysis , calcination , crystallite , x ray photoelectron spectroscopy , scanning electron microscope , temperature programmed reduction , coprecipitation , irradiation , nuclear chemistry , oxide , analytical chemistry (journal) , chemical engineering , inorganic chemistry , organic chemistry , crystallography , materials science , physics , nuclear physics , engineering , composite material
A series of Co/Fe hydrotalcite‐like samples were prepared by the traditional co‐precipitation method and treated under microwave irradiation at different temperatures, powers, and for various durations. The resulting samples have been calcined to obtain the nano‐oxide catalysts. Characterization by different physicochemical techniques including X‐ray diffraction (XRD), scanning electron microscopy (SEM), temperature programmed reduction by hydrogen (H 2 ‐TPR), and X‐ray photoelectron spectrometry (XPS) was carried out. The nanocatalysts were also tested in the total oxidation of propene. Comparing both conventional and microwave synthesis, a significant improvement in the catalytic activity was found for the samples prepared with microwave treatment. A minimum of irradiation time, power, and temperature (1 min, 40 W, and 40 °C) is enough to get higher surface area, larger pore size, smaller crystallite size, and a higher amount of reducible species than those for the non‐irradiated solid. All these factors are responsible for the enhancement of the catalytic activity.