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Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors
Functional Materials Laboratory, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
National Institute of Advanced Industrial Science and Technology (AIST), Advanced Manufacturing Research Institute, 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan
* Author to whom correspondence should be addressed.
Received: 11 February 2011; in revised form: 1 March 2011 / Accepted: 3 March 2011 / Published: 7 March 2011
Abstract: A study on the application of V2O5/WO3/TiO2 (VWT) as the sensitive material for resistive-type SO2 sensor was conducted, based on the fact that VWT is a well-known catalyst material for good selective catalytic nitrogen oxide reduction with a proven excellent durability in exhaust gases. The sensors fabricated in this study are planar ones with interdigitated electrodes of Au or Pt. The vanadium content of the utilized VWT is 1.5 or 3.0 wt%. The resistance of VWT decreases with an increasing SO2 concentration in the range from 20 ppm to 5,000 ppm. The best sensor response to SO2 occurs at 400 °C using Au electrodes. The sensor response value is independent on the amount of added vanadium but dependent on the electrode materials at 400 °C. These results are discussed and a sensing mechanism is discussed.
Keywords: sulfur dioxide; selective catalytic reduction (SCR); gas sensor; vanadia tungsten titania
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MDPI and ACS Style
Izu, N.; Hagen, G.; Schönauer, D.; Röder-Roith, U.; Moos, R. Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors. Sensors 2011, 11, 2982-2991.
Izu N, Hagen G, Schönauer D, Röder-Roith U, Moos R. Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors. Sensors. 2011; 11(3):2982-2991.
Izu, Noriya; Hagen, Gunter; Schönauer, Daniela; Röder-Roith, Ulla; Moos, Ralf. 2011. "Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors." Sensors 11, no. 3: 2982-2991.