摘要
主要研究Silicate-1型纳米分子筛对类神经毒气有机气体甲基磷酸二甲酯(DMMP)的敏感特性,并结合高灵敏度的石英谐振天平(QCM)研制了DMMP气体传感器。采用Silicate-1型纳米分子筛作为敏感膜材料分别对不同浓度的DMMP气体进行检测。QCM传感器随着气体浓度的增加,响应时间增加,气体吸附量增加;当DMMP浓度为50×10-6时,QCM响应频率为50 Hz。分别采用水汽,300×10-6 CO2和500×10-6 NH3作为干扰气体对该敏感膜材料选择性进行了研究,QCM的响应频率分别为178 Hz,28 Hz和15 Hz。采用交变电场作用下N2吹洗脱附,在60 s以内就可以达到85%以上的脱附率。
A new quartz crystal microbalance（QCM）gas sensor based on the silicate-1 zeolite film is introduced.The sensitive characteristics to the nerveagent sarin stimulant dimethylmethylphosphonate（DMMP）of the gas sensor have been systematically studied.Different concentration DMMP are detected by the sensor.As the concentration of DMMP increases,the respone time increases,and the absorbed capability of QCMsensor increases.The delta frequency of QCMis 50 Hz to 50×10-6 DMMP.In order to test the selectivity of the gas sensor,water vapor,300×10-6 CO2 and 500×10-6 NH3 are used as interfering gases.The delta frequencies of QCMto these gases are 178 Hz,28 Hz and 15 Hz.In 60 seconds the gas sensor obtained 85% desorption ratio by alternating field with 99.999% N2 blow-washing in this experiment.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第3期317-320,共4页
Chinese Journal of Sensors and Actuators
基金
教育部博士点基金项目(20070246099)
