Back to Search
Start Over
Functional properties of LaxCe1−xO2−δ nanocrystals and their bulk ceramics.
- Source :
- Journal of Materials Science: Materials in Electronics; Feb2019, Vol. 30 Issue 3, p2096-2106, 11p
- Publication Year :
- 2019
-
Abstract
- Structure-property correlations were investigated for La<subscript>x</subscript>Ce<subscript>1−x</subscript>O<subscript>2−δ</subscript> (x = 0.05, 0.15) system (for both nanoparticles and ceramic). The nanoparticles were synthesized by the co-precipitation route and characterized for their structural, catalytic and visible light driven photocatalytic properties. Synthesised La<subscript>x</subscript>Ce<subscript>1−x</subscript>O<subscript>2−δ</subscript> nanopowders depicted phase purity with excellent compositional control as confirmed by various structural characterisation tools. The 15% La<superscript>3+</superscript>-doped ceria nanoparticles portrayed superior photocatalytic properties; complete degradation (99%) of the methylene blue dye was observed within 60 min of visible light irradiation under an alkaline medium. High density (> 96%) of the ceramics (sintered at 1580 °C for 2 h) confirmed promising sinterability of the synthesised powders. The ionic conductivities of the La<subscript>x</subscript>Ce<subscript>1−x</subscript>O<subscript>2−δ</subscript> ceramics increased with temperature and frequency owing to enhanced oxygen vacancies in the ceria matrix as a result of doping (of La<superscript>3+</superscript>-ions); a maximum conductivity of ~ 8.4 × 10<superscript>−2</superscript> S cm<superscript>−1</superscript> was obtained at 900 °C for the 15% La<superscript>3+</superscript>-doped ceria ceramics at 1 MHz frequency. [ABSTRACT FROM AUTHOR]
- Subjects :
- CERAMICS
NANOCRYSTALS
CERIUM oxides
NANOPARTICLES
ELECTRIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 30
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 134970207
- Full Text :
- https://doi.org/10.1007/s10854-018-0481-3