Synthesis and characterization of Cu-doped ceria nanopowders

► Self-propagating room temperature method was applied to produce Cu doped ceria. ► The average crystalline size of particle was 4 nm. ► The largest amount of Cu incorporated to Ce 4+ sites of Ce 1− x Cu xO 2− γ was 7.5%. ► All powders exhibited high surface area with meso- and microporosity. Nanopo...

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Bibliographic Details
Published in:Ceramics international 2011-12, Vol.37 (8), p.3161-3165
Main Authors: Matović, B.Z., Bučevac, D.M., Rosić, M., Babić, B.M., Dohcević-Mitrović, Z.D., Radović, M.B., Popović, Z.V.
Format: Article
Language:English
Subjects:
D. CeO 2
Raman spectroscopy
Solid solution
XRD measurements
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Summary:► Self-propagating room temperature method was applied to produce Cu doped ceria. ► The average crystalline size of particle was 4 nm. ► The largest amount of Cu incorporated to Ce 4+ sites of Ce 1− x Cu xO 2− γ was 7.5%. ► All powders exhibited high surface area with meso- and microporosity. Nanopowdered solid solution Ce 1− x Cu x O 2− γ samples (0 ≤ x ≤ 0.15) were synthesized by self-propagating room temperature synthesis (SPRT). Raman spectroscopy and XRD at room temperature were used to study the vibration properties of these materials as well as the Cu solubility in ceria lattice. The solubility limit of Cu 2+ in CeO 2 lattice was found to be lower than published in the literature. Results show that obtained powders with low dopant concentration are solid solutions with a fluorite-type crystal structure. However, with Cu content higher than 7.5 mass%, the phase separation was observed and two oxide phases, CeO 2 and CuO, coexist. All powders were nanometric in size with high specific surface area.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.03.078