Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1490348 | Materials Research Bulletin | 2012 | 4 Pages |
Zinc oxide (ZnO) porous-shell hollow spheres (PHS) were prepared by thermally oxidizing high-purity zinc powder in an oxygen-containing atmosphere, and its ethanol gas sensing properties were measured in the concentration range of 10–400 ppm. At the optimum operating temperature of 350 °C, a sensitivity of 0.25/ppm was obtained and the response–concentration curve was of high linearity. The response and recovery times were measured to be ∼5–12 s and 8–13 s, respectively. The sensor was proved to be highly selective to ethanol. Our results indicate that ZnO PHS might be a promising material for fabricating practical ethanol sensors.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A kind of micron-sized ZnO porous-shell hollow spheres (PHS) was prepared. ► The gas sensors based on ZnO PHS were highly sensitive and selective to ethanol. ► ZnO PHS might be promising for fabricating practical ethanol sensors.