Nanostructured SnO2 for Application as a High-Temperature Methane Sensor

Konferenz: Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung
18.05.2010 - 19.05.2010 in Nürnberg

Tagungsband: Sensoren und Messsysteme 2010

Seiten: 4Sprache: EnglischTyp: PDF

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Becker, Benjamin; Wagner, Thorsten; Sauerwald, Tilman; Kohl, Dieter (Institut für Angewandte Physik der Justus-Liebig-Universität Gießen, Germany)
Becker, Benjamin; Waitz, Thomas; Wagner, Thorsten (Institut für Anorganische Chemie der Justus-Liebig Universität Gießen, Germany)
Tiemann, Michael (Department Chemie der Universität Paderborn, Germany)

The synthesis and characterization of mesoporous tin oxide and its application as a high temperature methane sensor are presented. Tin oxide was synthesized by the nanocasting method. This method uses rigid porous structure matrices to form a cast of the matrix inside its pores. In this work mesoporous silica of the KIT-6 pore structure was used. The obtained tin oxide material features a high specific surface area and an ordered mesopores. The porous structure is stable against high temperatures up to 600 °C without any significant loss of specific surface area. This makes the material a promising choice as a resistive sensor material for the detection of methane. Test measurements show that the sensitivity of the material to 4000 ppm methane is 2.4 times higher at 600 °C than at 500 °C. It is therefore an ideal candidate for the use in selective methane sensing using temperature cycles.