Fabrication and gas sensing property of honeycomb-like ZnO

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℃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 H;S gas sensors.