固体电解质二氧化碳传感器抗湿度变化的耐久性改进

Durability Improvement of Solid Electrolyte CO2 Sensor Against Humidity Variations.

作者信息

Lee Hyung-Kun, Choi Nak-Jin, Moon Seung Eon, Heo Jin Ah, Yang Woo Seok, Kim Jongdae

出版信息

J Nanosci Nanotechnol. 2015 Jan;15(1):404-7. doi: 10.1166/jnn.2015.8360.

DOI:10.1166/jnn.2015.8360

Abstract

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 Li2CO3 and BaCO3, as this sensing material is known to be robust to changes in humidity.

摘要

电位型二氧化碳传感器的传感材料采用碱金属/碱土金属碳酸盐或它们的组合。然而，碳酸锂容易对湿度产生响应，从而导致关于二氧化碳浓度的信息错误。在此，作者报道了一种用于电位型二氧化碳传感器的新型传感材料组合（碳酸锂/碳酸钡/氢氧化锂/氢氧化钡（摩尔比为1:2:0.05:0.1）），该组合不受湿度影响。当相对湿度从25%变为70%时，使用碳酸锂、碳酸钡、氢氧化锂和氢氧化钡组合的传感器的电动势（EMF）漂移了1.5%，这优于使用碳酸锂和碳酸钡的传感器6%的漂移，因为已知这种传感材料对湿度变化具有较强的耐受性。