pp. 21-28
S&M582 Research Paper Published: 2005 Gas Sensors Based on Nanosized-Zeolite Films to Identify Dimethylmethylphosphonate [PDF] Haifen Xie, Qiu dong Yang, Xiaoxiang Sun, Ting Yu, Jia Zhou and Yiping Huang Xiao-Ming Chen, Guang-Tao Fei, Li-Min Liang, Ping Cui and Yong Li (Received June 7, 2004; Accepted December 2, 2004) Keywords: zeolite, QCM, nerve agent gas, gas sensor, DMMP
Gas sensors have been developed using ZSM-5 zeolite films immobilized on a quartz crystal microbalance (QCM). Frequency shifts with different concentrations of nerve agent simulant dimethylmethylphosphonate (DMMP) are measured. The frequency shifts with time at 1 ppm, 5 ppm and 20 ppm DMMP are examined. A minimum detectable concentration of 1 ppm DMMP has been obtained in N2 at 293 K. In order to improve the selectivity of the sensor to the DMMP from other organic gases, different pore size zeolite films such as ZSM-5 zeolite and Ag+-modified ZSM-5 zeolite are studied. The frequency shifts of the films to acetone and ethanol at 1 ppm concentration are observed. Using principle component analysis, we can easily identify and quantify these testing gases.
Corresponding author: Haifen XieCite this article Haifen Xie, Qiu dong Yang, Xiaoxiang Sun, Ting Yu, Jia Zhou and Yiping Huang Xiao-Ming Chen, Guang-Tao Fei, Li-Min Liang, Ping Cui and Yong Li, Gas Sensors Based on Nanosized-Zeolite Films to Identify Dimethylmethylphosphonate, Sens. Mater., Vol. 17, No. 1, 2005, p. 21-28. |