摘要
以PANI为敏感材料,采用电聚合法制备PANI/Au/Al2O3电极,组装成感测系统,并以干燥的N2为背景气体,对23~1189ppm浓度范围的丙酮气体进行感测.分别添加O2、CO2、NH3、水蒸气作为干扰气体进行选择性实验.结果表明,当以O2或CO2作为干扰气体时,该气体传感器的灵敏度均有所降低,但混合气体中丙酮的浓度与感测电极的电阻变化率仍具有良好的线性关系;当加入水蒸气(30%RH)或4ppm氨气时,该丙酮气体传感器的电阻变化率分别稳定在5%和4%左右基本不变,不随丙酮气体浓度的改变而改变,说明该传感器受水分和氨气的干扰非常大.最后分别对PANI与丙酮、CO2、NH3、水蒸气进行反应的机理进行了分析.
The PANI/Au/Al2O3 electrode was prepared by electropolymerization with PANI as the sensitive material. The sensing system was assembled, and the acetone gas in the concentration range of 23~1189 ppm was sensed with N2 as the carrier gas. Then, O2, CO2, NH3 and water vapor were added as the interference gases for selective experiments. The results show that the sensitivity of the sensor is reduced when oxygen or carbon dioxide was used as the carrier gas. However, the concentration of acetone in the mixed gas still has a good linear relationship with the resistance change rate of the sensing electrode. When 30% relative humidity or 4 ppm ammonia gas was added, the change rate of the acetone gas sensing signal was maintained at 5% and 4% respectively, which indicate that the sensor is very disturbed by water vapor and ammonia. Finally, the mechanism of PANI sensing with acetone, CO2, NH3 and water vapor was analyzed.
作者
刘文龙
晏宸然
周衡刚
吴孟强
杜景顺
LIU Wenlong;YAN Chenran;ZHOU Henggang;WU Mengqiang;DU Jingshun(School of Energy Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;College of Pharmacy and Biological Engineering,Chengdu University,Chengdu 610106,China;Suidong Customs Integrated Technical Service Center,Guangzhou 510730,China;Department of Chemical and Materials Engineering,National Chin-Yi University of Technology,Taichung 411,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2019年第11期21-24,36,共5页
Electronic Components And Materials
基金
国家自然科学基金(31601529)
四川省科技厅应用基础项目(2019YJ0660)
海关总署科研项目(2019HK116)
