Optical Properties of a Nanocrystalline Co-Doped TiO2 after Various Treatments

被引：0
|
作者：
Mostovshchikova, E. V. [1 ]
Yermakov, A. Ye. [1 ,2 ]
Uimin, M. A. [1 ,2 ]
Minin, A. S. [1 ,2 ]
机构：
[1] Russian Acad Sci, Ural Branch, Mikheev Inst Met Phys, Ekaterinburg 620108, Russia
[2] Ural Fed Univ, Ekaterinburg 620002, Russia
来源：
PHYSICS OF THE SOLID STATE | 2019年 / 61卷 / 05期
关键词：
SOLID-STATE REACTION; COBALT; FERROMAGNETISM; SPECTRA;
D O I：
10.1134/S1063783419050202
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The absorption spectra of cobalt-doped anatase TiO2 nanopowders in the infrared and visible ranges have been studied after various oxidative and reductive treatments. The annealing leads to the appearance of the Drude-like contribution in the infrared region and significant change in the absorption in an visible range due to the formation of defects of the oxygen-vacancy-type and Ti3+ ions. The observed additional contribution in the absorption spectra of TiO2:Co nanopowders as compared to the spectra of undoped powders is ascribed to the d-d transitions in ions Co2+. The change in the absorption related to cobalt after annealing is explained by a change in the local environment of Co ions from the octahedral to the tetrahedral environment.
引用
收藏
页码：901 / 907
页数：7
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