In this communication, Ag/Fe2O3 nanocomposites were successfully synthesized by reduction of silver nitrate with NaBH4 and subsequent coating of Fe2O3 by a simple Pechini sol-gel method. Synthesized powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Gas sensing properties of Ag/Fe2O3 nanocomposites and pristine Fe2O3 were studied at different temperature and in the presence of different gases. It was found that Ag/Fe2O3 sensor even can detect 500 ppb NO2 gas at 150 °C, whereas pristine Fe2O3 sensor showed no significant response to NO2. The possible mechanisms of NO2 sensing by Ag/Fe2O3 are discussed in detail.

A novel gas sensor based on Ag/Fe2O3core-shell nanocomposites

Mirzaei, Ali;Bonyani, Maryam;Leonardi, Salvatore Gianluca;Neri, Giovanni
2016-01-01

Abstract

In this communication, Ag/Fe2O3 nanocomposites were successfully synthesized by reduction of silver nitrate with NaBH4 and subsequent coating of Fe2O3 by a simple Pechini sol-gel method. Synthesized powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Gas sensing properties of Ag/Fe2O3 nanocomposites and pristine Fe2O3 were studied at different temperature and in the presence of different gases. It was found that Ag/Fe2O3 sensor even can detect 500 ppb NO2 gas at 150 °C, whereas pristine Fe2O3 sensor showed no significant response to NO2. The possible mechanisms of NO2 sensing by Ag/Fe2O3 are discussed in detail.
2016
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3121774
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