期刊
JOURNAL OF MATERIALS SCIENCE
卷 50, 期 4, 页码 1935-1942出版社
SPRINGER
DOI: 10.1007/s10853-014-8758-2
关键词
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资金
- National Natural Science Foundation of China [51205274, 51205273]
- Shanxi Province Science Foundation for Youths [2013021017-2]
- Shanxi Scholarship Council of China [2013-035]
- China Postdoctoral Science Foundation [2013M530894]
- Technology Foundation for Selected Overseas Shanxi Scholar [[2014]95]
- Science and Technology Major Project of the Shanxi Science and Technology Department [20121101004]
- Key Disciplines Construction in Colleges and Universities of Shanxi [[2012]45]
Pure ZnO and Pd/ZnO microstructures were prepared by hydrothermal method. The crystalline structures, morphology, and composition of synthesized hexagon hammer Pd/ZnO microstructures were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS). They were then studied for gas detection in order to achieve the optimal concentration of Pd in ZnO. Our results show that overall the Pd/ZnO microstructures have a better performance for ethanol detection comparing to the one without Pd, including a better sensitivity, a decreased operating temperature, and a shortened response/recovery time. At the optimal Pd concentration of 0.25 wt%, we observed a sensitivity enhancement of 3.5 times larger than that of ZnO without doping and a response and recovery time of 10 and 7 s, respectively. Moreover, the Pd/ZnO sensors could show a high selectivity and an excellent chemical stability, thereby providing a way to improve the gas sensing performances.
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