標題: Fabrication and CO Sensing Properties of Mesostructured ZnO Gas Sensors
作者: Liu, Chueh-Yang
Chen, Chia-Fu
Leu, Jih-Perng
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: adsorption;carbon compounds;desorption;electron diffraction;electrophoresis;gas sensors;II-VI semiconductors;scanning electron microscopy;transmission electron microscopy;wide band gap semiconductors;X-ray diffraction;zinc compounds
公開日期: 2009
摘要: This study presents the synthesis of mesostructured ZnO using a template replication method and the fabrication of a carbon monoxide sensor using the synthesized ZnO using the dielectrophoresis process. The mesoporous carbon, CMK-3, was employed for the template and zinc nitrite was used as the precursor for synthesizing the ordered porous ZnO. The mesostructured ZnO was analyzed using X-ray diffraction (XRD) patterns, scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and N(2) adsorption-desorption isotherms. The XRD patterns indicated that the ZnO exhibited a highly ordered structure after the template was removed. The morphology of the ZnO was randomly oriented and the structure was polycrystalline. The surface area, pore volume, and pore size of the porous ZnO were 61.3 m(2) g(-1), 0.31 cm(3) g(-1), and 5.3 nm, respectively. When CO gas was injected, the optimum sensitivities at 250 degrees C were 12.1, 14.6, 18.4, 26.0, and 60% when the CO concentrations were 10, 20, 30, 50, and 70 ppm, respectively.
URI: http://hdl.handle.net/11536/7889
http://dx.doi.org/10.1149/1.3021044
ISSN: 0013-4651
DOI: 10.1149/1.3021044
期刊: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume: 156
Issue: 1
起始頁: J16
結束頁: J19
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