Gas sensing properties of WO3-based ceramics to ethanol vapors

Lyashkov, A. Yu.; Тонкошкур, А. С.; Makarov, V. O.

doi:10.1016/j.snb.2010.05.008

Cited by 15 publications

(1 citation statement)

References 24 publications

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“…It is believed that the underlying mechanism is that the ethanol species has an inclined conformation that permits easier access of −OH groups to the Ag surface, thereby forming molecularly chemisorbed ethanol, which is then dissociated by the chemisorbed ionic oxygen . The corresponding chemical reactions between oxygen molecules adsorbed on the WO 3 surface and ethanol molecules are , …”

Section: Resultsmentioning

confidence: 99%

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Yao

Yin

et al. 2016

ACS Appl. Mater. Interfaces

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Ag nanoparticle (NP)-sensitized WO3 hollow nanospheres (Ag-WO3-HNSs) are fabricated via a simple sonochemical synthesis route. It is found that the Ag-WO3-HNS shows remarkable performance in gas sensors. Field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) images reveal that the Agx-WO3 adopts the HNS structure in which WO3 forms the outer shell framework and the Ag NPs are grown on the inner wall of the WO3 hollow sphere. The size of the Ag NPs can be controlled by adjusting the addition amount of WCl6 during the reaction. The sensor Agx-WO3 exhibits extremely high sensitivity and selectivity toward alcohol vapor. In particular, the Ag(15nm)-WO3 sensor shows significantly lower operating temperature (230 °C), superior detection limits as low as 0.09 ppb, and faster response (7 s). Light illumination was found to boost the sensor performance effectively, especially at 405 and 900 nm, where the light wavelength resonates with the absorption of Ag NPs and the surface oxygen vacancies of WO3, respectively. The improved sensor performance is attributed to the localized surface plasmon resonance (LSPR) effect.

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Section: Resultsmentioning

confidence: 99%

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Yao

Yin

et al. 2016

ACS Appl. Mater. Interfaces

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Determination of gas sensing properties of thermally evaporated WO3 nanostructures

Senthilkumar

Ravi

Sekar

et al. 2014

J Mater Sci: Mater Electron

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ZnO–Ag ceramics for ethanol sensors

Lyashkov¹,

Тонкошкур²,

Aguilar-Martínez³

et al. 2013

Ceramics International

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Gas sensing properties of WO3-based ceramics to ethanol vapors

Cited by 15 publications

References 24 publications

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Determination of gas sensing properties of thermally evaporated WO3 nanostructures

ZnO–Ag ceramics for ethanol sensors

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Gas sensing properties of WO3-based ceramics to ethanol vapors

Cited by 15 publications

References 24 publications

Ag Nanoparticle-Sensitized WO3 Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO3 Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Determination of gas sensing properties of thermally evaporated WO3 nanostructures

ZnO–Ag ceramics for ethanol sensors

Contact Info

Product

Resources

About

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors