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EXAFS study of the Fex/ZrO2 composite nanomaterials obtained by sol-gel synthesis

 

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Opened Access EXAFS study of the Fex/ZrO2 composite nanomaterials obtained by sol-gel synthesis
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Author: Kriventsov, Vladimir
Kochubey, Dmitrii
Navío Santos, José Antonio
Hidalgo López, María del Carmen
Colón Ibáñez, Gerardo
Tsodikov, Mark
Maksimov, Yuri
Suzdalev, Igor
Department: Universidad de Sevilla. Departamento de Química orgánica
Date: 2001-03-01
Published in: Journal of Synchrotron Radiation, 8 (2), 528-530.
Document type: Article
Abstract: The local Zr and Fe arrangements in the nanocomposite system Fex/ZrO2 (x=0-0.2) obtained by sol-gel method were studied by EXAFS. The phase composition was found to vary significantly on iron loading. For the samples calcined at 500 or 600°C, at x≤0.01, the formed ZrO2 is a mixture of monoclinic and tetragonal structures. Only tetragonal structure is revealed at x≥0.05 with the exception of Fe0.2/ZrO2, calcined at 500°C, where new non-typically short Zr-Zr distances (3.29, 3.43Å) were observed. At low iron loading (less than one monolayer) Fe3+ ions were found to localize within the pre-surface layers of ZrO2 nanoparticles showing property of isolated ions. For greater Fe loading, iron exhibits either two-dimensional layer structure or two-phase system.
Cite: Kriventsov, V., Kochubey, D., Navío Santos, J.A., Hidalgo López, M.d.C., Colón Ibáñez, G., Tsodikov, M.,...,Suzdalev, I. (2001). EXAFS study of the Fex/ZrO2 composite nanomaterials obtained by sol-gel synthesis. Journal of Synchrotron Radiation, 8 (2), 528-530.
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URI: http://hdl.handle.net/11441/63510

DOI: 10.1107/S0909049501000875

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