期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 11, 页码 3008-3013出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.09.014
关键词
TiO2; Fiber; Hollow; Gas sensing
资金
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
We report the preparation of micro- and nano-scale hollow TiO2 fibers using a coaxial electrospinning technique and their gas sensing properties in terms of CO. The diameter of hollow TiO2 fibers can be controlled from 200 nm to several micrometers by changing the viscosity of electrospinning solutions. Lower viscosities produce slim hollow nanofibers. In contrast, fat hollow microfibers are obtained in the case of higher viscosities. A simple mathematical expression is presented to predict the change in diameter of hollow TiO2 fibers as a function of viscosity. The successful control over the diameter of hollow TiO2 fibers is expected to bring extensive applications. To test a potential use of hollow TiO2 fibers in chemical gas sensors, their sensing properties to CO are investigated at room temperature. (C) 2011 Elsevier Inc. All rights reserved.
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