Synthesis of La3+ doped nanocrystalline ceria powder by urea-formaldehyde gel combustion route

被引：14

作者：

Biswas, M. ^{[1
]}

Bandyopadhyay, S. ^{[1
]}

机构：

[1] Cent Glass & Ceram Res Inst, Kolkata 700032, India

来源：

MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 03期

关键词：

Ceramics; Chemical synthesis; X-ray diffraction; Optical properties; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; CEO2; TEMPERATURE; NANOPARTICLES; ABSORPTION; PARTICLES; SURFACES; LANTHANA; DOPANTS;

D O I：

10.1016/j.materresbull.2011.12.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline ceria powders doped with various concentrations of lanthanum oxide have been prepared following gel combustion route using for the first time urea-formaldehyde as fuel. The synthesized products were characterized by XRD, FESEM, TEM, PL and UV-vis spectroscopy. Peak positions of XRD were refined and the lattice parameters were obtained by applying Cohen's method. Unit cell parameter increases with concentration of La3+ ion and the variation is consistently linear. XRD calculations showed the dependence of crystallite size on dopant concentrations at lower level. TEM observation revealed unagglomerated particles to be single crystals in the average range of 20-30 nm. Band gap of the La3+ doped ceria materials does not change with doping. Spectroscopic experiments proved the existence of Ce3+ in the formed powder. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：544 / 550

页数：7

共 42 条

[1]

Aneggi E., 2006, J ALLOY COMPD, V1096, P408

[2] Auto ignition synthesis and consolidation of Al2O3-ZrO2 nano/nano composite powders [J].