Title :
Absorption and desorption characteristic of zeolites in gas sensor system
Author :
Yao, Wei ; Yuanyuan Hu ; Ji, Xinming ; Nan Ren ; Zhou, Jia ; Huang, Yiping ; Tang, Yi
Author_Institution :
Dept. of Microelectron., Fudan Univ., Shanghai, China
Abstract :
Nanosized zeolites as a novel absorbent were investigated targeting for the nerve agent sarin stimulant gas DMMP. Quartz crystal microbalance (QCM) gas sensors modified with Silicalite-1 or Cu-ZSM-5 zeolites synthesized as micro-porous absorbents were fabricated and their gas response characteristics were examined to study the absorption capability of zeolites. The results indicated that Cu-ZSM-5 zeolite has stronger absorption capacity than Silicalite-1 due to the affinity between Cu2+ and DMMP. Within our experimental conditions, when desorption temperature is 523 K and desorption time is 30 minutes, the Cu-ZSM-5 zeolite not only have optimum desorption properties, also have good repeatability. Compared with Silicalite-1, Cu-ZSM-5 zeolite is a preferable absorption material for chemical warfare agent detection and it also can present a good selective and repeating ability.
Keywords :
absorption; copper; desorption; gas sensors; nanotechnology; zeolites; Cu; absorption characteristic; chemical warfare agent detection; desorption characteristic; gas response characteristic; gas sensor system; microporous absorbents; nanosized zeolites; nerve agent sarin stimulant gas; quartz crystal microbalance; temperature 523 K; time 30 min; Absorption; Assembly; Colloidal crystals; Copper; Ethanol; Gas detectors; Gold; Substrates; Surface morphology; Testing; DMMP; Preconcentration; QCM; Zeolite;
Conference_Titel :
Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2185-5
Electronic_ISBN :
978-1-4244-2186-2
DOI :
10.1109/ICSICT.2008.4735102
