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학술지 Durability Improvement of Solid Electrolyte CO2 Sensor Against Humidity Variations
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저자
이형근, 최낙진, 문승언, 허진아, 양우석, 김종대
발행일
201501
출처
Journal of Nanoscience and Nanotechnology, v.15 no.1, pp.404-407
ISSN
1533-4880
출판사
American Scientific Publishers (ASP)
DOI
https://dx.doi.org/10.1166/jnn.2015.8360
협약과제
14MB1600, 스마트&그린 빌딩용 자가충전 지능형 센서노드 플랫폼 핵심기술 개발, 권종기
초록
The sensing materials of potentiometric CO2 sensors utilize alkali/alkali-earth metal carbonates or their combinations. However, lithium carbonate easily responds to humidity resulting in incorrect information regarding CO2 concentration. Herein, the authors report a new sensing material combination (Li2CO3/BaCO3/LiOH/Ba(OH)2 (1:2:0.05:0.1 molar ratio)) for a potentiometric CO2 sensor that is not affected by humidity. The electromotive force (EMF) of the sensor using a combination of Li2CO3, BaCO3, LiOH, and Ba(OH)2 drifted by 1.5% when the relative humidity was changed from 25% to 70%, which is superior to a drift of 6% of a sensor using Li2CO3and BaCO3, as this sensing material is known to be robust to changes in humidity.
키워드
Carbonate sensing material, Durability to humidity, Potentiometric CO sensor 2
KSP 제안 키워드
Alkali-earth metal, CO2 sensor, Co2 concentration, Durability improvement, Electromotive force (emf), Lithium carbonate, Material combination, Metal carbonates, Molar ratio, Relative Humidity, Sensing material