一种用于二氧化碳的微型化学电阻传感器。
A miniature chemiresistor sensor for carbon dioxide.
机构信息
Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA.
Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA.
出版信息
Anal Chim Acta. 2015 May 18;874:54-8. doi: 10.1016/j.aca.2015.03.020. Epub 2015 Mar 18.
A carpet-like nanostructure of polyaniline (PANI) nanothin film functionalized with poly(ethyleneimine), PEI, was used as a miniature chemiresistor sensor for detection of CO2 at room temperature. Good sensing performance was observed upon exposing the PEI-PANI device to 50-5000 ppm CO2 in presence of humidity with negligible interference from ammonia, carbon monoxide, methane and nitrogen dioxide. The sensing mechanism relied on acid-base reaction, CO2 dissolution and amine-catalyzed hydration that yielded carbamates and carbonic acid for a subsequent pH detection. The sensing device showed reliable results in detecting an unknown concentration of CO2 in air.
聚（乙二胺）功能化聚苯胺纳米薄膜的地毯状纳米结构被用作微型电阻式 CO2 室温传感器。在存在湿度的情况下，将该 PEI-PANI 装置暴露于 50-5000ppm 的 CO2 中时，观察到良好的传感性能，而对氨气、一氧化碳、甲烷和二氧化氮几乎没有干扰。该传感机制依赖于酸碱反应、CO2 溶解以及胺催化水合作用，生成氨基甲酸酯和碳酸，用于后续的 pH 检测。该传感装置在空气中检测未知浓度的 CO2 时表现出可靠的结果。
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