کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1462992 | 989641 | 2011 | 5 صفحه PDF | دانلود رایگان |
Nanopowdered solid solution Ce1−xCuxO2−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 Cu2+ in CeO2 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, CeO2 and CuO, coexist. All powders were nanometric in size with high specific surface area.
► 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 Ce4+ sites of Ce1−xCuxO2−γ was 7.5%.
► All powders exhibited high surface area with meso- and microporosity.
Journal: Ceramics International - Volume 37, Issue 8, December 2011, Pages 3161–3165