| 초록 |
A SnO2-based thick film gas sensor was studied for detection of sulfur dioxide (0.1-10ppm SO2). The SnO2-based gas sensor was prepared by adding magnesium and vanadium oxides to SnO2. The SnO2-based gas sensor developed in this study showed not only good sensor response, but also complete recovery ability by thermal treatment in air. In particular, new SnO2-based gas sensor produced by adding magnesium and vanadium oxides (5wt% MgO, 2wt% V2O5) showed sensor response of about 44% in the low concentration of 1ppm SO2. Moreover, its response maintained during multiple cycles of detection and recovery properties. This result was due to promoter effect and synergistic effect between magnesium and vanadium oxides. |
