Polymers 2013, 5(1), 45-55; doi:10.3390/polym5010045

Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor

1email, 2email and 2,3,* email
Received: 18 November 2012; in revised form: 10 December 2012 / Accepted: 25 December 2012 / Published: 10 January 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Pd doped WO3 fibers were synthesized by electro-spinning. The sol gel method was employed to prepare peroxopolytungstic acid (P-PTA). Palladium chloride and Polyvinyl pyrrolidone (PVP) was dissolved in the sol Pd:WO3 = 10% molar ratio. The prepared sol was loaded into a syringe connected to a high voltage of 18.3 kV and electrospun fibers were collected on the alumina substrates. Scanning electron microscope (SEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques were used to analyze the crystal structure and chemical composition of the fibers after heat treatment at 500 °C. Resistance-sensing measurements exhibited a sensitivity of about 30 at 500 ppm hydrogen in air, and the response and recovery times were about 20 and 30 s, respectively, at 300 °C. Hydrogen gas sensing mechanism of the sensor was also studied.
Keywords: Pd doped WO3 nanofiber; hydrogen sensor; electrospinning; sensing mechanism
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MDPI and ACS Style

Nikfarjam, A.; Fardindoost, S.; Iraji zad, A. Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor. Polymers 2013, 5, 45-55.

AMA Style

Nikfarjam A, Fardindoost S, Iraji zad A. Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor. Polymers. 2013; 5(1):45-55.

Chicago/Turabian Style

Nikfarjam, Alireza; Fardindoost, Somayeh; Iraji zad, Azam. 2013. "Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor." Polymers 5, no. 1: 45-55.

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