7 April 2009 Carbon monoxide sensitivity detection by PEDOT-PSS/zeolite composites gas sensing materials
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Abstract
Poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonic acid), PEDOT-PSS, was synthesized via the oxidative polymerization. ZSM-5 zeolites were used as the selective microporous adsorbent to improve selectivity and sensitivity of the conductive polymer towards carbon dioxide (CO). PEDOT-PSS was dry mixed with the zeolites and compressed to form PEDOT-PSS/zeolite thin pellets. Zeolites of type ZSM-5 of various Si/Al mole ratios were chosen to investigate the effect of Si/Al mole ratios on the electrical conductivity response and sensitivity of the composites when exposed to CO. The electrical conductivity sensitivity of PEDOT-PSS_1:1/zeolite composites towards CO negatively increases with decreasing Si/Al mole ratio. The highest electrical conductivity sensitivity response is obtained from the composite with Si/al ratio equal to 23, PEDOT-PSS_1:1/ZSM-5(Si/Al = 23).
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Pojjawan Chanthaanont, Anuvat Sirivat, "Carbon monoxide sensitivity detection by PEDOT-PSS/zeolite composites gas sensing materials", Proc. SPIE 7293, Smart Sensor Phenomena, Technology, Networks, and Systems 2009, 72931E (7 April 2009); doi: 10.1117/12.814846; https://doi.org/10.1117/12.814846
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