Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1258368 | Chinese Chemical Letters | 2008 | 5 Pages |
We report the structural characterization and proposed formation mechanism of honeycomb-like ZnO conglomerations fabricated by direct precipitation method. X-ray diffraction (XRD), energy-disperse X-ray spectrometry (EDS), scanning electron microscopy (SEM) showed that the as-prepared ZnO calcined at 700 °C were micron sphere particles with honeycomb-like structure. In the UV–vis absorbing spectrum, it was observed that there is a new additional absorption band at 260 nm, and it was speculated that the absorption may be caused by defects on the surface and interface of honeycomb-like ZnO. The as-products showed high sensitivity and short response time to sulfured hydrogen gas. These results demonstrate that honeycomb-like ZnO conglomerations are very promising materials for fabricating H2S gas sensors.