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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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湿度对聚苯胺氨气传感器性能影响的研究
DOI: 10.3724/SP.J.1105.2014.13378, PP. 156-163
Keywords: 聚苯胺,氨气,相对湿度,相对灵敏度
Abstract:
研究了相对湿度对聚苯胺氨气传感器性能的影响，发现相对湿度（RH）在10%~80%，氨气浓度在10~2500μL/L范围内时，聚苯胺膜对氨气的相对灵敏度随氨气浓度的增加而增加，在相同氨气浓度下响应时间随湿度的增加而变短，当氨气浓度小于400μL/L时，相对湿度则对相对灵敏度影响不大.但当氨气浓度大于500μL/L，相对湿度大于40%时，在相同氨气浓度下，随着相对湿度的增大，响应时间变短，但相对灵敏度降低.因为水分子加入后，NH3和H2O形成了大量更易于使聚苯胺去质子化的NH4OH分子，从而加快了反应速度，缩短了响应时间，而大量水分子（RH≥40%）的质子化作用降低了相对灵敏度.因此相对湿度是聚苯胺氨气传感器必须考虑的重要因素之一.
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