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Sensors 2016, 16(8), 1249; doi:10.3390/s16081249

Comparative Study of Two Different TiO2 Film Sensors on Response to H2 under UV Light and Room Temperature

1
State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
2
College of Chemistry, Fuzhou University, Fuzhou 350108, China
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 27 June 2016 / Revised: 25 July 2016 / Accepted: 2 August 2016 / Published: 8 August 2016
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [2171 KB, uploaded 8 August 2016]   |  

Abstract

An anatase TiO2 film sensor was prepared by a facile in-situ method on the interdigitated Au electrode deposited on the alumina substrate. The structure, morphology and the optical properties of the in-situ TiO2 film sensor were characterized by X-ray diffraction, Scanning Electron Microscopy, and UV-vis diffuse reflectance spectra. The photo-assisted gas sensitivities of the prepared film towards H2 gas were evaluated at room temperature in N2 and synthetic air atmospheres. As compared to TiO2 film sensor prepared by drop-coating method, this in-situ TiO2 film sensor exhibited a more compact structure composed of uniform TiO2 microspheres as well as a better gas sensitivity towards H2 under UV irradiation, especially in synthetic air. The photo-electrochemical measurements suggest that these improvements may be associated with the efficient charge transfer in the TiO2 interface induced by the TiO2 microsphere structure. This study might offer a feasible approach to develop photo-assisted gas sensors at ambient temperature. View Full-Text
Keywords: semiconductor gas sensor; in-situ fabrication; photo-response; photo-electrochemical measurement; electron transfer semiconductor gas sensor; in-situ fabrication; photo-response; photo-electrochemical measurement; electron transfer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Peng, X.; Wang, Z.; Huang, P.; Chen, X.; Fu, X.; Dai, W. Comparative Study of Two Different TiO2 Film Sensors on Response to H2 under UV Light and Room Temperature. Sensors 2016, 16, 1249.

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