LaSrCoFeO and Fe2O3/LaSrCoFeO Powders:  Synthesis and Characterization

LaSrCoFeO and Fe2O3/LaSrCoFeO Powders:  Synthesis and Characterization

This work focuses on a La0.6Sr0.4Co0.8Fe0.2O3- δ (LaSrCoFeO) perovskite and Fe2O3/LaSrCoFeO nanocomposite powders; the samples are characterized by means of X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), diffuse reflectance infrared...

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Veröffentlicht in:Chemistry of materials 2007-05, Vol.19 (11), p.2796-2808
Hauptverfasser: Galenda, Alessandro, Natile, Marta Maria, Krishnan, Venkata, Bertagnolli, Helmut, Glisenti, Antonella
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container_end_page 2808
container_issue 11
container_start_page 2796
container_title Chemistry of materials
container_volume 19
creator Galenda, Alessandro
Natile, Marta Maria
Krishnan, Venkata
Bertagnolli, Helmut
Glisenti, Antonella
description This work focuses on a La0.6Sr0.4Co0.8Fe0.2O3- δ (LaSrCoFeO) perovskite and Fe2O3/LaSrCoFeO nanocomposite powders; the samples are characterized by means of X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, scanning electronmicroscopy (SEM), and thermal analysis (TA) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The nanosized LaSrCoFeO perovskite is obtained by Pechini method and is treated at increasing temperature. The LaSrCoFeO perovskite phase forms at T ≥ 1173 K; at this temperature, traces of La2O3, Co3O4, and La(2- x )Sr x CoO4 are also present. Strontium is surface segregated as SrCO3 and SrO. Nanocomposite Fe2O3/LaSrCoFeO powder samples (Fe2O3/LaSrCoFeO = 1:9 and 1:1 wt) are obtained by wet impregnation. The iron oxide deposition damages the perovskite structure because of the diffusion of iron inside the perovskite; this is particularly evident from SEM images.
doi_str_mv 10.1021/cm062742i
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Nanocomposite Fe2O3/LaSrCoFeO powder samples (Fe2O3/LaSrCoFeO = 1:9 and 1:1 wt) are obtained by wet impregnation. The iron oxide deposition damages the perovskite structure because of the diffusion of iron inside the perovskite; this is particularly evident from SEM images.</abstract><pub>American Chemical Society</pub><doi>10.1021/cm062742i</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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title LaSrCoFeO and Fe2O3/LaSrCoFeO Powders:  Synthesis and Characterization
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