Influence of the sensitive zeolite material on the characteristics of a potentiometric hydrocarbon gas sensor
The voltage response of Na-ZSM-5 zeolite/Au electrodes with different Si/Al ratios is measured in dependence of propane partial pressure in O2/CO2/N2 atmospheres at 723 K. A mixture of two NaxCoO2 phases serves as a reference electrode. The zeolites with higher Si/Al ratios lead to higher sensitivities to propane at low concentrations (< 1000 ppm). It is shown that this is in accordance with the assumption of a sensor effect caused by changes of the Na+ion activity due to sorption of propane in the zeolite micropores. The response times to propane concentration steps decrease with increasing propane concentration.
Zeolite ZSM-5 Hydrocarbon gas sensor Sodium ion conduction
Andreas Dubbe
University of Bayreuth, Faculty of Engineering Science.Chair of Functional aterials,95440 Bayreuth, Germany
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1645-1647
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）