Hydrogen and Ethanol Sensing Properties of Pd-Loaded ZnO Nanoparticles Synthesized by Flame Spray Pyrolysis

Chawarat Siriwong; Jintaporn Yimchoy; Sangtian Nabsanit; Anurat Wisitsoraat; Sukon Phanichphant

doi:10.4028/www.scientific.net/AMR.1131.146

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1131Hydrogen and Ethanol Sensing Properties of...

Hydrogen and Ethanol Sensing Properties of Pd-Loaded ZnO Nanoparticles Synthesized by Flame Spray Pyrolysis

Abstract:

Pure ZnO and Palladium (Pd)-loaded ZnO nanoparticles containing 0.25, 0.50, 0.75 and 1.0 mol% of Pd were successfully synthesized by flame spray pyrolysis (FSP) and characterized for hydrogen and ethanol sensing applications. The crystalline phase, morphology and size of these nanoparticles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) in order to correlate physical properties with gas sensing performance. The sensing films were fabricated by coating nanoparticles with organic paste composed of terpineol and ethyl cellulose as a vehicle binder on Al₂O₃ substrate interdigitated with gold electrodes. The film thicknesses were varied by controlling the numbers of coating. Film morphologies of gas sensors were characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Moreover, response time and sensitivity of these sensors towards hydrogen and ethanol were evaluated under operating temperatures ranging from 200 ̶ 350°C in dry air. Finally, The optimum amount of loading Pd and film thickness were investigated.

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Periodical:

Advanced Materials Research (Volume 1131)

Pages:

146-152

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1131.146

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Online since:

December 2015

Authors:

Chawarat Siriwong*, Jintaporn Yimchoy, Sangtian Nabsanit, Anurat Wisitsoraat, Sukon Phanichphant

Keywords:

Flame Spray Pyrolysis (FSP), Gas Sensor, Palladium, Zinc Oxide

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