Methanol gas-sensing properties of CeO2-Fe2O3 thin films (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Methanol gas-sensing properties of CeO2-Fe2O3 thin films (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.snb.2005.06.062 (literal)

Alternative label

• Neri G, Bonavita A, Rizzo G, Galvagno S, Capone S, Siciliano P (2006)
  Methanol gas-sensing properties of CeO2-Fe2O3 thin films
  in Sensors and actuators. B, Chemical (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Neri G, Bonavita A, Rizzo G, Galvagno S, Capone S, Siciliano P (literal)

Pagina inizio

• 687 (literal)

Pagina fine

• 695 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 114 (literal)

Rivista

• Sensors and actuators. B, Chemical (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Univ Messina, Dept Ind Chem & Mat Engn, I-98166 Messina, Italy; CNR, IMM, Sez Lecce, Lecce, Italy (literal)

Titolo

• Methanol gas-sensing properties of CeO2-Fe2O3 thin films (literal)

Abstract

• Ce-doped iron oxide thin films have been prepared by a liquid-phase method (LPD) and tested as methanol gas sensors. Sensing tests have shown that the addition of Ce to Fe2O3 increases the response to methanol at low temperature (< 350 degrees C). The optimum loading of Ce was 50% in moles. At operating temperatures > 400 degrees C, the response of CeO2-doped Fe2O3 sensors is instead lower than that of pure Fe2O3. To find properties-sensitivity relationships, the microstructure, acid-base properties and reactivity of CeO2-Fe2O3 powders were investigated by X-ray diffraction (XRD), temperature-programmed desorption of adsorbed CO2 (TPD-CO2) and gas-phase oxidation of methanol. Ce-doped iron oxides powders have shown the formation of a FexCe1-xO2 solid solution, smaller grain size and an increase of the number of basic sites compared to pure Fe2O3. Moreover, the addition of Ce to Fe2O3 was found to promote the adsorption of methanol and its subsequent oxidation to CO2. Correlation between the amount of basic sites, oxidation activity and the response to methanol were reported. According to the obtained results, the role played by Cc on modifying the methanol-sensing properties of iron oxide thin films was related to its capability to: (a) form a solid solution and reduce the grain size; (b) enhance the number of basic sites and methanol adsorption; (c) promote the methanol oxidation activity of the sensing layer. This latter was found to be the factor limiting the sensors response at higher temperatures. (literal)

Prodotto di

• Sensori e Microsistemi Intelligenti per la Sicurezza e la Qualità della vita nei settori Agroalimentare, Trasporti ed \"Ambient Assisted Living\" (MD.P05.010.001) (Modulo)
• Institute for microelectronics and microsystems (IMM) (Istituto)

Autore CNR

• PIETRO ALEARDO SICILIANO (Unità di personale interno)
• SIMONETTA CAPONE (Persona)

Incoming links:

Prodotto

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Sensori e Microsistemi Intelligenti per la Sicurezza e la Qualità della vita nei settori Agroalimentare, Trasporti ed \"Ambient Assisted Living\" (MD.P05.010.001) (Modulo)

Autore CNR di

• SIMONETTA CAPONE (Persona)
• PIETRO ALEARDO SICILIANO (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Sensors and actuators. B, Chemical (Rivista)