An investigation on the low concentration hydrogen detection properties of Poly acrylonitrile nanofibrous layers coated with Palladium metal
Paper ID : 1419-ICNS
Mahsa Ahmadi1, hossein tavanai *1, mehdi ranjbar2, Mehdi Torabi Goodarzi2
1Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran
2Department of Physics, Isfahan University of Technology, Isfahan, Iran
In this study, we focus on polyacrylonitrile nanofibrous layer as a nanoporous and flexible substrate for the fabrication of palladium based hydrogen gas sensors. Different polyacrylonitrile nanoporous layers with random and parallel array were electrospun from 12% and 15% (w/v) solutions of polyacrylonitrile. Palladium was deposited on electrospun nanofibers with a thickness of 10 nm, using DC magnetron sputtering method. Elemental mapping and GIXRD were used to conform the deposition of palladium on the surface of the nanofibers. It was observed that palladium followed the nanofibers morphology. The response of the sensors at room temperature was investigated according to changes of electrical resistance after exposure to hydrogen gas with concentration of 12 ppm. The chemical and morphological structure of the electrospun layers were characterized by FESEM and FTIR. The results showed high response of the fabricated sensors to hydrogen with concentration of 12 ppm. No change was observed in the chemical structure and morphology of the substrate of sensor during the deposition and sensing process.
Hydrogen sensor; Palladium; Nanofibrous layer; Electrospinning; Sputtering
Status : Abstract Accepted (Oral Presentation)