摘要
Ag-WO3纳米复合材料通过低温溶胶凝胶法(sol-gel)和共渍法成功合成,并且基于该纳米复合材料制备了检测低浓度NO2气体的旁热式气敏元件。研究了100~300 ℃的温度范围内该传感器对H2S、CO、NO2、C2H5OH、CH3COCH3的气敏性能。结果表明,质量分数为1.0%Ag-WO3气敏传感器对10 ppm的NO2气体展现了最高的灵敏度和选择性。同时对Ag-WO3气敏传感器探测气体前后的气敏机理进行了讨论和分析。
The Ag-WO3 nanocomposites were successfully synthesized by the low-temperature sol-gel method and the impregnating method.Meanwhile,the heater-type gas sensors were made to detect NO2 in the low concentration range.The gas sensing performance of sensors were studied towards H2S,CO,NO2,C2H5OH and CH3COCH3 gases at 100 ℃ to 300 ℃.The experiment results demonstrated that,1.0% Ag-WO3 sensor was maximally sensitive and selective towards 10 ppm NO2 gas.At the same time,the mechanism of Ag-WO3 gas sensor before and after gas detection was discussed and analyzed.
作者
张帅
尹聪
ZHANG Shuai;YIN Cong(College of Sciences,Shanghai University,Shanghai 200444,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2019年第7期1-6,10,共7页
Instrument Technique and Sensor
基金
上海市科委扬帆计划项目(15YF1404000)
