Citation: Yan Li Wang, Shun Tan, Jia Wang, Zhi Jin Tan, Qiu Xia Wu, Zheng Jiao, Ming Hong Wu. The gas sensing properties of TiO₂ nanotubes synthesized by hydrothermal method[J]. Chinese Chemical Letters, ;2011, 22(5): 603-606. doi: 10.1016/j.cclet.2010.11.020 shu

The gas sensing properties of TiO₂ nanotubes synthesized by hydrothermal method

Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received Date: 13 September 2010

Fund Project: This work was financial supported by the Chinese Ministry of Science and Technology 973 Program (No.2006CB705604)the National Natural Science Foundation (No.50578090) and Shanghai Leading Academic Discipline Project(No.S30109)Science and Technology Commission of Shanghai Municipality (No.09XD1401800)

In this paper, the TiO₂ nanotubes were synthesized by hydrothermal method usinga 10 mol/LNaOH aqueous solution at 150℃.The structure of prepared materials was characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), scanning electron microscope(SEM)and Brunauer-Emmett-Teller(BET).The prepared TiO₂ nanotubes were used to prepare thick film gas sensors and the gas sensing properties to various gases were tested.Results show the prepared TiO₂ nanotube gas sensors responses to ethanol under dry condition at 450℃.This could be attributed to the fact that it had high porous morphology and a higher pore volume, which can promote the diffusion of ethanol deep inside the films and improve the sensor response.Moreover, the gas sensor made with nanotubes exhibit high selective response towards ethanol gas compared with H₂, CO, acetone.
- TiO₂ nanotubes,
- Hydrothermal method,
- Gas sensing
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