TY - JOUR
T1 - Effect of rare earth dopants on structural characteristics of nanoceria synthesized by combustion method
AU - Jamshidijam, M.
AU - Mangalaraja, R. V.
AU - Akbari-Fakhrabadi, A.
AU - Ananthakumar, S.
AU - Chan, S. H.
N1 - Funding Information:
The authors acknowledge FONDECYT, Government of Chile, Direction of Investigation, University of Concepcion, Chile (Project No.: 1130916 ) for the support to carry out this project.
PY - 2014/2
Y1 - 2014/2
N2 - Rare earth (RE)-doped ceria powders with a chemical composition of Ce1-xRExO2-x/2 (X: 0.1 and RE: Gd, Sm, Er, Pr, Nd and Y) were prepared by nitrate-fuel combustion method. The TG and DT analyses of the as-synthesized powders showed a complete combustion with a small range endothermic process within a broad exothermic reaction. GDC, SDC, EDC, PDC, NDC and YDC precursors were calcined at 700°C for 2h and characterized using XRD, SEM and TEM. Powder characteristics such as morphology, crystallite size, primary particle size, lattice parameter and lattice strain of calcined powders have been studied. All X-ray diffraction patterns of as-synthesized and calcined samples were indexed as fluorite structure. The crystallite size of nanoceria obtained by Scherrer's formula was between 17 and 19.5nm and via Williamson-Hall (W-H) plots in the range of 25-38nm that shows the effect of lattice strain on the average crystallite size. Primary particle size calculated from BET data was in the range of 24-37nm. TEM images showed fine spherical particles and SAED patterns confirmed fluorite structure of all powders.
AB - Rare earth (RE)-doped ceria powders with a chemical composition of Ce1-xRExO2-x/2 (X: 0.1 and RE: Gd, Sm, Er, Pr, Nd and Y) were prepared by nitrate-fuel combustion method. The TG and DT analyses of the as-synthesized powders showed a complete combustion with a small range endothermic process within a broad exothermic reaction. GDC, SDC, EDC, PDC, NDC and YDC precursors were calcined at 700°C for 2h and characterized using XRD, SEM and TEM. Powder characteristics such as morphology, crystallite size, primary particle size, lattice parameter and lattice strain of calcined powders have been studied. All X-ray diffraction patterns of as-synthesized and calcined samples were indexed as fluorite structure. The crystallite size of nanoceria obtained by Scherrer's formula was between 17 and 19.5nm and via Williamson-Hall (W-H) plots in the range of 25-38nm that shows the effect of lattice strain on the average crystallite size. Primary particle size calculated from BET data was in the range of 24-37nm. TEM images showed fine spherical particles and SAED patterns confirmed fluorite structure of all powders.
KW - Combustion
KW - Crystallite size
KW - Nanoceria
KW - Rare earth dopants
KW - Structure
UR - http://www.scopus.com/inward/record.url?scp=84890822783&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2013.10.032
DO - 10.1016/j.powtec.2013.10.032
M3 - Article
AN - SCOPUS:84890822783
SN - 0032-5910
VL - 253
SP - 304
EP - 310
JO - Powder Technology
JF - Powder Technology
ER -