کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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743363 | 1462116 | 2012 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hydrogen sensors on the basis of SnO2–TiO2 systems Hydrogen sensors on the basis of SnO2–TiO2 systems](/preview/png/743363.png)
In this study we compare two types of materials for gas sensor applications: co-precipitated SnO2 and TiO2 and their mechanical mixtures. TEM, FTIR, and TXRD analyses were used to compare the synthesized materials. It was found that co-precipitation leads to the formation at low temperatures of a rutile phase only, which does not undergo any phase transformation upon heating. In contrast, separately synthesized TiO2 with anatase-type structure induces crystallite growth in SnO2 mechanically mixed with the former oxide. Sensing properties of the materials in question were analyzed in a broad range of working temperatures and H2 concentrations. Higher signals of co-precipitated materials are discussed regarding their electrical properties, thermal stability and surface hydroxyls.
Journal: Sensors and Actuators B: Chemical - Volume 174, November 2012, Pages 527–534