Selectivity shifting behavior of Pd nanoparticles loaded zinc stannate/zinc oxide (Zn2SnO4/ZnO) nanowires sensors

Arafat, M.M. and Ong, Ji Yan and Haseeb, A.S. Md. Abdul (2018) Selectivity shifting behavior of Pd nanoparticles loaded zinc stannate/zinc oxide (Zn2SnO4/ZnO) nanowires sensors. Applied Surface Science, 435. pp. 928-936. ISSN 0169-4332

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Official URL: https://doi.org/10.1016/j.apsusc.2017.10.211

Abstract

In this research, the gas sensing behavior of Pd nanoparticles loaded zinc stannate/zinc oxide (Zn 2 SnO 4 /ZnO) nanowires were investigated. The Zn 2 SnO 4 /ZnO nanowires were grown on Au interdigitated alumina substrate by carbon assisted thermal evaporation process. Pd nanoparticles were loaded on the Zn 2 SnO 4 /ZnO nanowires by wet reduction process. The nanowires were characterized by X-ray diffractometer, field emission scanning electron microscope and energy dispersive X-ray spectroscope. The Zn 2 SnO 4 /ZnO and Pd nanoparticles loaded Zn 2 SnO 4 /ZnO nanowires were investigated for detecting H 2 , H 2 S and C 2 H 5 OH gases in N 2 background. Results revealed that the average diameter and length of as-grown Zn 2 SnO 4 /ZnO nanowires were 74 nm and 30 μm, respectively. During wet reduction process,Pd particles having size of 20–60 nm were evenly distributed on the Zn 2 SnO 4 /ZnO nanowires. The Zn 2 SnO 4 /ZnO nanowires based sensors showed selective response towards C 2 H 5 OH whereas Pd nanoparticles loaded Zn 2 SnO 4 /ZnO nanowires showed selective response towards H 2 . The recovery time of the sensors reduced with Pd loading on Zn 2 SnO 4 /ZnO nanowires. A mechanism is proposed to elucidate the gas sensing mechanism of Pd nanoparticles loaded Zn 2 SnO 4 /ZnO nanowires.

Item Type: Article
Uncontrolled Keywords: Zinc stannate (Zn2SnO4); Zinc oxide (ZnO); Pd nanoparticles; Gas sensors; Nanowires; Carbon assisted thermal evaporation
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Sep 2019 01:51
Last Modified: 20 Sep 2019 01:51
URI: http://eprints.um.edu.my/id/eprint/22457

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