Role of trivalent La and Nd dopants in lattice distortion and oxygen vacancy generation in cerium oxide nanoparticles
- 12 June 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (24) , 243110
- https://doi.org/10.1063/1.2210795
Abstract
Nanocrystalline Ce 1 − x RE x O 2 − y ( RE = La and Nd) powders were synthesized with a controlled size in the range of 3 – 5 nm using microemulsion technique. The nanoceria retains its cubic fluorite structures for the complete doping range. X-ray diffraction and Raman spectroscopic studies showed that the lattice distortion increased with the doping amount and was found to be higher for La-doped samples compared to the Nd doping. Spatial correlation model used for Raman analysis suggested increased defect concentration for the doped samples compared to nanoceria.Keywords
This publication has 13 references indexed in Scilit:
- Size dependency variation in lattice parameter and valency states in nanocrystalline cerium oxideApplied Physics Letters, 2005
- Nanocrystalline ceria imparts better high–temperature protectionProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2004
- Nanocrystalline undoped ceria oxygen sensorSensors and Actuators B: Chemical, 2003
- Improved lithium capacity of defective V2O5 materialsSolid State Ionics, 2002
- Cerium oxide nanoparticles: Size-selective formation and structure analysisApplied Physics Letters, 2002
- Synthesis of Nanocrystalline Ceria Particles for High Temperature Oxidation Resistant CoatingJournal of Nanoparticle Research, 2002
- Size-dependent properties ofnanoparticles as studied by Raman scatteringPhysical Review B, 2001
- Preparation of ceria–zirconia sub-catalysts for automotive exhaust cleaningJournal of Alloys and Compounds, 2000
- Raman study of: Second-order scattering, lattice dynamics, and particle-size effectsPhysical Review B, 1993
- Electrical properties of ceria-based oxides and their application to solid oxide fuel cellsSolid State Ionics, 1992