Journal
MATERIALS RESEARCH BULLETIN
Volume 47, Issue 12, Pages 4340-4346Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2012.09.007
Keywords
Nanostructures; Surface properties; Defects; Raman spectroscopy; Ionic conductivity
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In this study, the fabrication and characterization of pure and gadolinium (Gd) doped ceria nanostructures (Ce1-xGdxO2-delta where x=0.05, 0.1 and 0.2) are investigated. The origin of defect formation has been systematically investigated by XRD and UV-Visible Raman. All the fabricated ceria are found to be Nanosponge morphology which is observed by using FESEM technique. The charge transfer of O2- ions and Ce3+/Ce4+ in the ceria host due to these defect structures are studied by UV-DRS. Impedance analysis is showed an enhanced ionic conductivity for 5% Gd doped ceria compared to other concentration of Gd, revealing that the dopant concentration is a critical parameter in engineering a large number of vacancy defects in ceria nanostructures. (C) 2012 Elsevier Ltd. All rights reserved.
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