Effects of Nb doping on the TiO2 anatase-to-rutile phase transition

被引：294

作者：

Arbiol, J ^{[1
]}

Cerdà, J ^{[1
]}

Dezanneau, G ^{[1
]}

Cirera, A ^{[1
]}

Peiró, F ^{[1
]}

Cornet, A ^{[1
]}

Morante, JR ^{[1
]}

机构：

[1] Univ Barcelona, Dept Elect, EME Elect Mat & Engn, Barcelona 08028, Spain

来源：

JOURNAL OF APPLIED PHYSICS | 2002年 / 92卷 / 02期

关键词：

D O I：

10.1063/1.1487915

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the influence of Nb doping on the TiO2 anatase-to-rutile phase transition, using combined transmission electron microscopy, Raman spectroscopy, x-ray diffraction and selected area electron diffraction analysis. This approach enabled anatase-to-rutile phase transition hindering to be clearly observed for low Nb-doped TiO2 samples. Moreover, there was clear grain growth inhibition in the samples containing Nb. The use of high resolution transmission electron microscopy with our samples provides an innovative perspective compared with previous research on this issue. Our analysis shows that niobium is segregated from the anatase structure before and during the phase transformation, leading to the formation of NbO nanoclusters on the surface of the TiO2 rutile nanoparticles. (C) 2002 American Institute of Physics.

引用

页码：853 / 861

页数：9

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