Journal
SENSORS
Volume 10, Issue 6, Pages 5590-5603Publisher
MDPI
DOI: 10.3390/s100605590
Keywords
conductive polymer; gas sensor; poly(p-phenylenevinylene); ammonium nitrate; zeolite Y
Funding
- Conductive and Electroactive Polymers Research Unit, Chulalongkorn University
- KFAS, Chulalongkorn University
- Thailand Research Fund (TRF-BRG)
- Center of Petroleum, Petrochemicals and Advanced Materials
- Thai Royal Government
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Poly(p-phenylenevinylene) (PPV) was chemically synthesized via the polymerization of p-xylene-bis(tetrahydrothiophenium chloride) monomer and doped with H2SO4. To improve the electrical conductivity sensitivity of the conductive polymer, Zeolites Y (Si/Al = 5.1, 30, 60, 80) were added into the conductive polymer matrix. All composite samples show definite positive responses towards NH4NO3. The electrical conductivity sensitivities of the composite sensors increase linearly with increasing Si/Al ratio: with values of 0.201, 1.37, 2.80 and 3.18, respectively. The interactions between NH4NO3 molecules and the PPV/zeolite composites with respect to the electrical conductivity sensitivity were investigated through the infrared spectroscopy.
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