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Ni-doped WO3 flakes-based sensor for fast and selective detection of H2S

Nguyen, H.T.T. and Truong, T.H. and Nguyen, T.D. and Dang, V.T. and Vu, T.V. and Nguyen, S.T. and Cu, X.P. and Nguyen, T.T.O. (2020) Ni-doped WO3 flakes-based sensor for fast and selective detection of H2S. Journal of Materials Science: Materials in Electronics, 31 (15). pp. 12783-12795. ISSN 9574522

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Abstract

In this work, we report on the synthesis of Ni-doped WO3 flakes by the hydrothermal method. The physical and chemical properties of the synthesized Ni-doped WO3 flakes were thoroughly investigated by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, Raman spectroscopy, photoluminescence spectrum, X-ray diffraction, X-ray photoelectron spectroscopy, and N2 adsorption–desorption measurement, thereby confirming the effect of Ni doping on H2S-sensing properties. The sensitivity to H2S gas of Ni-doped WO3 flakes showed short response/recovery times of 17 s/110 s, high stability, good selectivity, and low operating temperature of 250 °C. Due to the increasing surface defects and oxygen vacancies with the presence of Ni2+ ions in the structure of WO3 flakes, the Ni-doped WO3 sensor exhibited a better sensing of H2S gas than the pristine WO3 sensor. This result indicates that the Ni-doped WO3 flake structure is promising for detecting H2S gas as a selective, inexpensive, and outstanding sensor materials. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Item Type: Article
Divisions: Faculties > Faculty of Vehicle and Energy Engineering
Identification Number: 10.1007/s10854-020-03830-9
Uncontrolled Keywords: Energy dispersive spectroscopy; High resolution transmission electron microscopy; Hydrothermal synthesis; Photoelectron spectroscopy; Photoluminescence spectroscopy; Scanning electron microscopy; Surface defects; Tungsten compounds; X ray photoelectron spectroscopy; Desorption measurements; Hydrothermal methods; Low operating temperature; Photoluminescence spectrum; Physical and chemical properties; Scanning electrons; Selective detection; Sensor materials; Nickel compounds
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/8967

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