Amorphous TiO2 nanotube arrays for low-temperature oxygen sensors

Lu, Hao Feng, Li, Feng, Liu, Gang, Chen, Zhi-Gang, Wang, Da-Wei, Fang, Hai-Tao, Lu, Gao Qing, Jiang, Zhou Hua and Cheng, Hui-Ming (2008) Amorphous TiO2 nanotube arrays for low-temperature oxygen sensors. Nanotechnology, 19 40: Article Number: 405504. doi:10.1088/0957-4484/19/40/405504

Author Lu, Hao Feng
Li, Feng
Liu, Gang
Chen, Zhi-Gang
Wang, Da-Wei
Fang, Hai-Tao
Lu, Gao Qing
Jiang, Zhou Hua
Cheng, Hui-Ming
Title Amorphous TiO2 nanotube arrays for low-temperature oxygen sensors
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
Publication date 2008-10-08
Year available 2008
Sub-type Article (original research)
DOI 10.1088/0957-4484/19/40/405504
Open Access Status
Volume 19
Issue 40
Start page Article Number: 405504
Total pages 7
Editor M. Reed
Place of publication Bristol, England
Publisher Institute of Physics Publishing
Language eng
Subject C1
100708 Nanomaterials
861103 Basic Iron and Steel Products
Abstract Titania nanotube arrays (TNTA) were synthesized on a titanium substrate using anodic oxidation in an electrolyte containing ammonium fluoride and evaluated for low-temperature oxygen sensing. Their sensing properties were tested at different temperatures (50, 100, 150, 200, 250 and 300 degrees C) when exposed to various oxygen concentrations. The as-prepared TNTA are amorphous and exhibit much higher carrier concentration than that of annealed TNTA. Such amorphous TNTA show much higher sensitivity than that of annealed TNTA, SrTiO3 and Ga2O3 sensors. This sample demonstrates the lowest detectable oxygen concentration of 200 ppm, excellent recovery and good linear correlation at 100 degrees C. These results indicate that TNTA are indeed very attractive oxygen-sensing materials.
Keyword Sensitized Solar-Cells
Titania Nanotubes
Gas Sensors
Sensing Properties
Tin Oxide
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 50602011
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Chemical Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 101 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 27 Mar 2009, 01:46:04 EST by Amanda Lee on behalf of School of Chemical Engineering