Microstructural and morphological analysis of pure and Ce-doped tin dioxide nanoparticles

被引:83
作者
Maciel, AP
Lisboa-Filho, PN
Leite, ER [1 ]
Paiva-Santos, CO
Schreiner, WH
Maniette, Y
Longo, E
机构
[1] UFSCar, DQ, LIEC, CMDMC, BR-13565905 Sao Carlos, SP, Brazil
[2] UNESP, IQ, BR-14800900 Araraquara, SP, Brazil
[3] UFPR, Dept Fis, LSI, BR-81531990 Curitiba, Parana, Brazil
基金
巴西圣保罗研究基金会;
关键词
SnO2; powders-chemical preparation; X-ray methods; precursors-organic;
D O I
10.1016/S0955-2219(02)00190-5
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Structural morphological studies in pure and Ce-doped tin dioxide nanoparticles with high stability against particle growth were performed in samples, obtained using the polymeric precursor method and prepared at different annealing temperatures. A Ce-rich surface layer was used to control the particle size and stabilize SnO2 against particle growth. The formation of this segregated layer can contribute to a decreased surface energy, acting in the driving force, or reducing the surface mobility. Only the cassiterite SnO2 phase was observed below 1000 degreesC and a secondary phase (CeO2) was observed for the Ce-doped SnO2 at temperatures higher than 1000 degreesC, when de-mixing process occurs. The evolution of crystallite size, microstrain and morphology of the nanoparticles with annealing temperatures was investigated by X-ray diffraction (XRD), associated to Rietveld refinements, X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:707 / 713
页数:7
相关论文
共 15 条
[11]   A PROFILE REFINEMENT METHOD FOR NUCLEAR AND MAGNETIC STRUCTURES [J].
RIETVELD, HM .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1969, 2 :65-&
[12]   A study of the SnO2•Nb2O5 system for an ethanol vapour sensor:: a correlation between microstructure and sensor performance [J].
Weber, IT ;
Andrade, R ;
Leite, ER ;
Longo, E .
SENSORS AND ACTUATORS B-CHEMICAL, 2001, 72 (02) :180-183
[13]  
Young R. A., 1989, Archiwum Nauki o Materialach, V10, P71
[14]   PROFILE SHAPE FUNCTIONS IN RIETVELD REFINEMENTS [J].
YOUNG, RA ;
WILES, DB .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1982, 15 (AUG) :430-438
[15]  
YOUNG RA, 1998, USERS GUIDE PROGRAM