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Nanomaterials 2015, 5(2), 737-749;

Synthesis, Characterization and Gas Sensing Properties of [email protected]α-Fe2O3 Core–Shell Nanocomposites

Department of Materials Science and Engineering, Shiraz University, 71946-85115 Shiraz, Iran
Department of Electronic Engineering, Chemistry and Industrial Engineering, University of Messina, C.da di Dio, 98166 Messina, Italy
Author to whom correspondence should be addressed.
Academic Editor: Thomas Nann
Received: 25 March 2015 / Revised: 20 April 2015 / Accepted: 29 April 2015 / Published: 5 May 2015
PDF [2723 KB, uploaded 19 May 2015]


[email protected]α-Fe2O3 nanocomposite having a core–shell structure was synthesized by a two-step reduction-sol gel approach, including Ag nanoparticles synthesis by sodium borohydride as the reducing agent in a first step and the subsequent mixing with a Fe+3 sol for α-Fe2O3 coating. The synthesized [email protected]α-Fe2O3 nanocomposite has been characterized by various techniques, such as SEM, TEM and UV-Vis spectroscopy. The electrical and gas sensing properties of the synthesized composite towards low concentrations of ethanol have been evaluated. The [email protected]α-Fe2O3 nanocomposite showed better sensing characteristics than the pure α-Fe2O3. The peculiar hierarchical nano-architecture and the chemical and electronic sensitization effect of Ag nanoparticles in [email protected]α-Fe2O3 sensors were postulated to play a key role in modulating gas-sensing properties in comparison to pristine α-Fe2O3 sensors. View Full-Text
Keywords: [email protected]α-Fe2O3; core–shell; nanocomposite; synthesis; gas sensor; ethanol [email protected]α-Fe2O3; core–shell; nanocomposite; synthesis; gas sensor; ethanol

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Mirzaei, A.; Janghorban, K.; Hashemi, B.; Bonavita, A.; Bonyani, M.; Leonardi, S.G.; Neri, G. Synthesis, Characterization and Gas Sensing Properties of [email protected]α-Fe2O3 Core–Shell Nanocomposites. Nanomaterials 2015, 5, 737-749.

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