Structural and conductivity study of Y and Rb co-doped TiO2 synthesized by the sol-gel method

被引：20

作者：

Kallel, W. ^{[1
]}

Bouattour, S. ^{[1
]}

Kolsi, A. W. ^{[1
]}

机构：

[1] Fac Sci Sfax, Lab Etat Solide, Sfax, Tunisia

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2006年 / 352卷 / 38-39期

关键词：

titanate; nanocrystals; X-ray diffraction; transport properties gel; conductivity; SEM; scanning electron microscopy; defects; powders; nanoparticles; rare-earths in glasses; sol-gels (xerogels); thermal conductivity; XPS;

D O I：

10.1016/j.jnoncrysol.2006.08.014

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：

Nanoparticles of titanium dioxide co-doped with Y3+ and Rb+ were prepared using the sol-gel method and were characterized by thermogravimetric-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. Y3+ and Rb+ co-doped TiO2 powder calcined at 800 degrees C shows a synergistic effect, which shifted the transformation anatase-rutile to higher temperature. X-ray diffraction and XPS analysis revealed that Y3+ and Rb+ did not enter into the crystal lattices of TiO2 and are uniformly dispersed onto TiO2 particles. In this study, the conductivity measurements were performed under ambient atmosphere on undoped and co-doped TiO2 in order to investigate the defect chemistry by identifying the predominant charge carriers. An increase in the conductivity sigma of nano-TiO2 is shown when the samples were co-doped with Y3+ and Rb+. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：3970 / 3978

页数：9

共 52 条

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