Amperometric Nitrous Oxide Gas Sensor： Preparation ol Cu/PANI/Cu Electrodes and Sensing Behavior
Amperometric Nitrous Oxide Gas Sensor： Preparation ol Cu/PANI/Cu Electrodes and Sensing Behavior作者机构：Department of Environment and Energy Research Center for Advanced MaterialsMdxico Chihuahua 31000 Graduate Department Technological Institute of OaxacaMdxico Oaxaca 68000 Department of Basic Science Technological Institute of Chihuahua II. Chihuahua MexicoChihuahua 31000
出 版 物：《Journal of Environmental Science and Engineering(B)》 (环境科学与工程（B）)
年 卷 期：2012年第1卷第12期
页 面：1297-1302页
学科分类：081704[工学-应用化学] 07[理学] 080202[工学-机械电子工程] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程]
主 题：Polymer electrochemical gas sensor nitrous oxide impedance.
摘 要：The authors studied the changes in the electrical properties of PANI （polyaniline） when exposed to the presence of N20 （nitrous oxide）. The techniques used to determine the adsorption of gas in the polymer were the electrochemical impedance, steps voltammetry and transmission electron microscopy. The objective of this work was to determine the ability of adsorption and desorption of PANI to be used as sensor in an open environment. Measurements were performed in a controlled atmosphere, temperature and flux. The gas was passed through a glass capsule in which an electrochemical cell was designed with copper electrodes and PANI as electrolyte. The change in electrical properties of the material is analyzed using a potentiostat/galvanostat in situ. Subsequently, the material was analyzed by TEM （Transmission Electron Microscopy） elemental analysis. The measurements were performed with difl^rent concentrations of N20 with a purity of 99%. As a result of measurements, it was found that the change in electrical resistance of PANI is caused by the physical interaction that occurs when in contact with NzO and even a change in the morphology of polymer, however, the binding is weak and sufficient to increase the temperature at which 25% PANI film regains its original properties.
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