Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5355802 | Applied Surface Science | 2016 | 8 Pages |
Abstract
Pure and Cobalt doped ZnO microstructures have been prepared by hydrothermal method and calcinations at 600 °C. The crystal structure, surface morphology and chemical composition of the samples were determined by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy, respectively, indicating that the presence of a small quantity of Co ions can greatly affect the morphology of the ZnO nanostructures. When used for methane gas sensing, 1 wt% Co/ZnO (CZ1) sensor exhibited the highest response to 100 ppm methane at 140 °C, which were about 2 times higher than that of pure ZnO samples. Moreover, the 1 wt% Co/ZnO sensor also displayed fast response/recovery time (19/27 s), low detection limit (50 ppb). Thus, the CZ1 microstructures are promising for practical methane sensing applications.
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Authors
Jie Hu, Fanqin Gao, Zhenting Zhao, Shengbo Sang, Pengwei Li, Wendong Zhang, Xiongtu Zhou, Yong Chen,