Effect of macrostructural control of an auxiliary layer on the CO2 sensing properties of NASICON-based gas sensors
Effect of macrostructural control of an auxiliary layer on the CO2 sensing properties of NASICON-based gas sensors
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DOI：
10.1016/j.snb.2009.03.038
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发表时间：
2009-06-04
影响因子：
8.4
通讯作者：
Egashira, Makoto
中科院分区：
文献类型：
--
作者：
Morio, Masataka;Hyodo, Takeo;Egashira, Makoto
研究了辅助电极油的宏观结构对NASICON（Na 3 Zr 2Si 2 PO 12）固体电解质传感器CO2气敏性能的影响。与多孔的Li 2CO 3-BaCO 3-基辅助层（nip-Sensor），这是通过利用组分金属醋酸盐和聚甲基丙烯酸甲酯微球作为模板制备的传感器，显示出更快的CO2响应和恢复和较小的交叉响应对湿度变化比那些获得了致密的辅助层没有孔（d-Sensor）。mp-传感器的CO2响应幅度略大于理论值。这可能是由于存在可能与辅助层中的CO2反应的杂质。另一方面，c-Sensor与较厚和致密的辅助层，这是由市售的碳酸盐制备的，表现出较小的CO2响应和较大的交叉响应湿度比mp-Sensor和d-Sensor。因此，证实了使用由组分金属乙酸盐制备的多孔辅助层对于改善CO2感测特性沿着大的CO2响应和小的对湿度的交叉响应是有效的。(C)2009爱思唯尔有限公司版权所有。
Macrostructural effects of an auxiliary electrode oil the CO2 gas sensing properties of NASICON (Na3Zr2Si2PO12) solid-electrolyte sensors were investigated. The sensor with a porous Li2CO3-BaCO3-based auxiliary layer (nip-Sensor), which was prepared by utilizing constituent metal acetates and polymethylmethacrylate microspheres as a template, showed faster CO2 response and recovery and smaller cross-response against humidity changes than those obtained with a dense auxiliary layer without pores (d-Sensor). The Magnitude of CO2 response of mp-Sensor was slightly larger than the theoretical one. probably due to the existence of impurities which might have reacted with CO2 in the auxiliary layer. On the other hand, c-Sensor with a thicker and dense auxiliary layer, which was prepared by commercially available carbonates, showed smaller CO2 response and larger cross-response to humidity than mp-Sensor and d-Sensor. Thus, the use of the porous auxiliary layer prepared by constituent metal acetates was confirmed to be effective for improving the CO2 sensing properties along with the large CO2 response and small cross-response to humidity. (C) 2009 Elsevier B.V. All rights reserved.