Selectivity shifting behavior of Pd nanoparticles loaded zinc stannate/zinc oxide (Zn2SnO4/ZnO) nanowires sensors
| Autor: | M.M. Arafat, A.S.M.A. Haseeb, J.Y. Ong |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Stannate Nanowire General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry Zinc Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Field emission microscopy chemistry Chemical engineering 0210 nano-technology Selectivity Carbon Diffractometer |
| Zdroj: | Applied Surface Science. 435:928-936 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2017.10.211 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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