Oxygen sensing performance of Nb-doped TiO2 thin film with porous structure

被引：26

作者：

Gan, Linhui ^{[1
]}

Wu, Congcong ^{[1
]}

Tan, Yuan ^{[1
]}

Chi, Bo ^{[1
]}

Pu, Jian ^{[1
]}

Jian, Li ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Ctr Fuel Cell Innovat, Wuhan 430074, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 585卷

基金：

中国国家自然科学基金;

关键词：

Titania; Nb-doping; Oxygen sensing; Sol-gel method; GAS SENSOR; MECHANISM; TEMPERATURE; NANOWIRES; COATINGS; ANATASE;

D O I：

10.1016/j.jallcom.2013.09.161

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, Nb-doped titanium dioxide (TiO2) porous thin films in application of oxygen sensors were studied. A facile sol-gel method was used to prepare the undoped and Nb-doped TiO2 thin films. The microstructure and oxygen-sensing behavior were investigated. The results indicate that Nb-doping can retard the phase transition from anatase to rutile and reduce the grain size. The oxygen responses of the thin film can be greatly improved by Nb-doping, which are 73.2 and 78.7 for sample with 6% Nb-doping measured at 700 degrees C in the atmosphere with 2% and 20.9% oxygen, while those for undoped TiO2 are only 6.5 and 6.6 in the same condition. The 6% Nb-doped TiO2 thin film also shows the fastest response time of only 1.1 s at 700 degrees C, which is only less than 1/10 of those for the undoped TiO2 thin film. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：729 / 733

页数：5

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