Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites
Ag@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 Ag@α-Fe2O3...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-05-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/5/2/737 |
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| author | Ali Mirzaei Kamal Janghorban Babak Hashemi Anna Bonavita Maryam Bonyani Salvatore Gianluca Leonardi Giovanni Neri |
| author_facet | Ali Mirzaei Kamal Janghorban Babak Hashemi Anna Bonavita Maryam Bonyani Salvatore Gianluca Leonardi Giovanni Neri |
| author_sort | Ali Mirzaei |
| collection | DOAJ |
| description | Ag@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 Ag@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 Ag@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 Ag@α-Fe2O3 sensors were postulated to play a key role in modulating gas-sensing properties in comparison to pristine α-Fe2O3 sensors. |
| first_indexed | 2024-12-21T07:14:22Z |
| format | Article |
| id | doaj.art-783e42dc175b41b1af0376989b3cedfb |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-21T07:14:22Z |
| publishDate | 2015-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-783e42dc175b41b1af0376989b3cedfb2022-12-21T19:11:55ZengMDPI AGNanomaterials2079-49912015-05-015273774910.3390/nano5020737nano5020737Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell NanocompositesAli Mirzaei0Kamal Janghorban1Babak Hashemi2Anna Bonavita3Maryam Bonyani4Salvatore Gianluca Leonardi5Giovanni Neri6Department of Materials Science and Engineering, Shiraz University, 71946-85115 Shiraz, IranDepartment of Materials Science and Engineering, Shiraz University, 71946-85115 Shiraz, IranDepartment of Materials Science and Engineering, Shiraz University, 71946-85115 Shiraz, IranDepartment of Electronic Engineering, Chemistry and Industrial Engineering, University of Messina, C.da di Dio, 98166 Messina, ItalyDepartment of Materials Science and Engineering, Shiraz University, 71946-85115 Shiraz, IranDepartment of Electronic Engineering, Chemistry and Industrial Engineering, University of Messina, C.da di Dio, 98166 Messina, ItalyDepartment of Electronic Engineering, Chemistry and Industrial Engineering, University of Messina, C.da di Dio, 98166 Messina, ItalyAg@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 Ag@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 Ag@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 Ag@α-Fe2O3 sensors were postulated to play a key role in modulating gas-sensing properties in comparison to pristine α-Fe2O3 sensors.http://www.mdpi.com/2079-4991/5/2/737Ag@α-Fe2O3 core–shellnanocompositesynthesisgas sensorethanol |
| spellingShingle | Ali Mirzaei Kamal Janghorban Babak Hashemi Anna Bonavita Maryam Bonyani Salvatore Gianluca Leonardi Giovanni Neri Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites Nanomaterials Ag@α-Fe2O3 core–shell nanocomposite synthesis gas sensor ethanol |
| title | Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites |
| title_full | Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites |
| title_fullStr | Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites |
| title_full_unstemmed | Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites |
| title_short | Synthesis, Characterization and Gas Sensing Properties of Ag@α-Fe2O3 Core–Shell Nanocomposites |
| title_sort | synthesis characterization and gas sensing properties of ag α fe2o3 core shell nanocomposites |
| topic | Ag@α-Fe2O3 core–shell nanocomposite synthesis gas sensor ethanol |
| url | http://www.mdpi.com/2079-4991/5/2/737 |
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