Synthesis, characterization and sensitivity tests of perovskite-type LaFeO3 nanoparticles in CO and propane atmospheres
2016; Elsevier BV; Volume: 42; Issue: 16 Linguagem: Inglês
10.1016/j.ceramint.2016.09.027
ISSN1873-3956
AutoresLorenzo Gildo-Ortiz, Juan Reyes-Gómez, José Manuel Flores-Álvarez, Héctor Guillén-Bonilla, M. de la L. Olvera, Verónica-María Rodríguez-Betancourtt, Ysmael Verde-Gómez, A. Guillén-Cervantes, J. Santoyo‐Salazar,
Tópico(s)Multiferroics and related materials
ResumoNanoparticles of perovskite-type LaFeO3 were synthesized by a simple process using stoichiometric lanthanum and iron nitrates, ethylenediamine, and distilled water as a solvent. Microwave radiation, with a power of ~350 W, was applied for solvent evaporation. The obtained precursor powders were calcined at 200, 400, 500, 600 and 700 °C in static air, and analyzed by X-ray diffraction and cyclic voltammetry. The samples showed catalytic activity and high physical and chemical stability. The calcined powders at 700 °C were analyzed through scanning and transmission electron microscopy; agglomerated nanoparticles, forming a porous structure, were observed with an average size of 28 nm. Their magnetic properties correspond to magnetization up to 0.83 emu/g and coercivity of 182 Oe. Pellets from these powders were prepared to measure the sensitivity to CO and propane gases, obtaining high performance at different gas concentrations and operation temperatures.
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