Gas sensing properties of polyacrylonitrile/metal oxide nanofibrous mat prepared by electrospinning
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초록
Polyacrylonitrile(PAN)/metal oxide(MO) nanocomposite mats with a thickness of 0.12 mm were electrospun by adding 0 to 10 wt% of MO nanoparticles (Fe2O3, ZnO, SnO2, Sb2O3-SnO2) into PAN. Pt electrode was patterned on Al2O3 substrate by DC sputtering and then the PAN(/MO) mats on the Pt patterned Al2O3 were electrically wired to investigate the CO2 gas sensing properties. As the MO content rose, the fiber diameter decreased due to the presence of lumps caused by the presence of MOs in the fiber. The PAN/2% ZnO mat revealed a faster response time of 93 s and a relatively short recovery of 54 s with a ΔR of 0.031 MΩ at a CO2 concentration of 200 ppm. The difference in sensitivity was not observed significantly for the PAN/MO fiber mats in the CO2 concentration range of 100 to 500 ppm. It can be concluded that an appropriate amount of MO nanoparticles in the PAN backbone leads to improvement of the CO2 gas sensing properties.
Abstract
Polyacrylonitrile(PAN)/metal oxide(MO) nanocomposite mats with a thickness of 0.12 mm were electrospun by adding 0 to 10 wt% of MO nanoparticles (Fe2O3, ZnO, SnO2, Sb2O3-SnO2) into PAN. Pt electrode was patterned on Al2O3 substrate by DC sputtering and then the PAN(/MO) mats on the Pt patterned Al2O3 were electrically wired to investigate the CO2 gas sensing properties. As the MO content rose, the fiber diameter decreased due to the presence of lumps caused by the presence of MOs in the fiber. The PAN/2% ZnO mat revealed a faster response time of 93 s and a relatively short recovery of 54 s with a ΔR of 0.031 MΩ at a CO2 concentration of 200 ppm. The difference in sensitivity was not observed significantly for the PAN/MO fiber mats in the CO2 concentration range of 100 to 500 ppm. It can be concluded that an appropriate amount of MO nanoparticles in the PAN backbone leads to improvement of the CO2 gas sensing properties.
참고문헌 (15)
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