Synthesis and gas-sensing properties of Pd-doped SnO2 nanocrystals. A case study of a general methodology for doping metal oxide nanocrystals (Articolo in rivista)

Type
Label
  • Synthesis and gas-sensing properties of Pd-doped SnO2 nanocrystals. A case study of a general methodology for doping metal oxide nanocrystals (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/cg700970d (literal)
Alternative label
  • Epifani, M; Arbiol, J; Pellicer, E; Comini, E; Siciliano, P; Faglia, G; Morante, JR (2008)
    Synthesis and gas-sensing properties of Pd-doped SnO2 nanocrystals. A case study of a general methodology for doping metal oxide nanocrystals
    in Crystal growth & design
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Epifani, M; Arbiol, J; Pellicer, E; Comini, E; Siciliano, P; Faglia, G; Morante, JR (literal)
Pagina inizio
  • 1774 (literal)
Pagina fine
  • 1778 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 8 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Epifani, Mauro; Siciliano, Pietro] CNR IMM, I-73100 Lecce, Italy; [Arbiol, Jordi; Pellicer, Eva; Morante, Joan R.] Univ Barcelona, EME CeAE IN2UB, Dept Elect, E-08028 Barcelona, Spain; [Arbiol, Jordi] Univ Barcelona, TEM MAT, Serv Cientificotecn, E-08028 Barcelona, Spain; [Comini, Elisabetta; Faglia, Guido] Univ Brescia, CNR INFM, Brescia, Italy; [Comini, Elisabetta; Faglia, Guido] Univ Brescia, Dip Chim & Fis Ingn & Mat, SENSOR, Brescia, Italy (literal)
Titolo
  • Synthesis and gas-sensing properties of Pd-doped SnO2 nanocrystals. A case study of a general methodology for doping metal oxide nanocrystals (literal)
Abstract
  • \"Pd-modified SnO2 nanocrystals, with a Pd/Sn nominal atomic ratio of 0.025, were prepared by injecting SnO2 sols and a Pd precursor solution into tetradecene and dodecylamine at 160 degrees C. Two different doping procedures were investigated: in co-injection, a Pd acetylacetonate solution in chloroform was mixed with the SnO2 sol before the injection; in sequential injection, the Pd solution was injected separately after the SnO2 sol. The obtained suspensions were heated at the resulting 80 degrees C temperature, then the product was collected by centrifugation and dried at 80 degrees C. When using co-injection, in the dried products PdO and Pd nanoparticles were observed by high-resolution transmission electron microscopy. Only SnO2 nanocrystals were observed in dried products prepared by sequential injection. After heat-treatment at 500 degrees C, no Pd species were observed for both doping procedures. Moreover, X-ray photoelectron spectroscopy showed that, in both the doping procedures, after heat-treatment Pd is distributed only into the SnO2 nanocrystal structure. This conclusion was reinforced by the measurement of the electrical properties of Pd-doped nanocrystals, showing a remarkable increase of the electrical resistance if compared with pure SnO2 nanocrystals. This result was interpreted as Pd insertion as a dopant inside the cassiterite lattice of tin dioxide. The addition of Pd resulted in a remarkable improvement of the gas-sensing properties, allowing the detection of carbon monoxide concentrations below 50 ppm and of very low concentrations (below 25 ppm) of other reducing gases such as ethanol and acetone.\" (literal)
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