Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique (Articolo in rivista)

Type

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

Label

• Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique (Articolo in rivista) (literal)

Anno

• 2005-01-01T00:00:00+01:00 (literal)

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

• 10.1039/b502470f (literal)

Alternative label

• Armelao L., Bertagnolli H., Gross S., Krishnan V. (2005)
  Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique
  in Journal of materials chemistry (Print)
  (literal)

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

• Armelao L., Bertagnolli H., Gross S., Krishnan V. (literal)

Pagina inizio

• 2020 (literal)

Pagina fine

• 2027 (literal)

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

• 15 (literal)

Rivista

• Journal of materials chemistry (Rivista)

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

• 8 (literal)

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

• 20 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany CNR, Inst Sci & Tecnol Mol, I-35131 Padua, Italy Univ Padua, INSTM, Dipartimento Sci Chim, I-35131 Padua, Italy (literal)

Titolo

• Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique (literal)

Abstract

• The structural evolution and the effects of calcium doping on LaCoO3 powders as a function of thermal annealing were investigated by means of X-ray absorption fine structure spectroscopy from both Co and La K-edges. The samples, synthesized by a sol-gel process starting from methanolic solutions of cobalt(II) and calcium(II) acetates, and lanthanum(III) nitrate, were analysed as xerogels (as-prepared) and after heat treatment. The investigations indicated that the lanthanum cobaltite skeleton was not yet formed in the as-prepared samples whereas significant structural changes ascribable to the formation of the LaCoO3 network were detected after annealing at temperatures between 700 and 1000 degrees C. Doping with calcium induced remarkable influences in the local structure of the system, which are dependent on the treatment temperatures. These changes could be attributed to different effects: i) the formation of cobalt and calcium oxide-based compounds, ii) the distortion in the perovskite structure and iii) the partial substitution of La(III) sites by Ca(II) ions. The studies also indicated the change in the oxidation state of cobalt from +2 in the xerogels to +3 after annealing. (literal)

Prodotto di

• Istituto di scienze e tecnologie molecolari (ISTM) (Istituto)
• Progettazione molecolare di nanosistemi organizzati (PM.P05.007.001) (Modulo)
• Modelli e metodologie per lo studio di molecole e nanosistemi organizzati per la produzione ed immagazzinamento di energia (PM.P07.010.011) (Modulo)

Autore CNR

• SILVIA GROSS (Unità di personale interno)
• LIDIA ARMELAO (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto di scienze e tecnologie molecolari (ISTM) (Istituto)
• Modelli e metodologie per lo studio di molecole e nanosistemi organizzati per la produzione ed immagazzinamento di energia (PM.P07.010.011) (Modulo)
• Progettazione molecolare di nanosistemi organizzati (PM.P05.007.001) (Modulo)

Autore CNR di

• SILVIA GROSS (Unità di personale interno)
• LIDIA ARMELAO (Unità di personale interno)

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

• Journal of materials chemistry (Rivista)

Insieme di parole chiave di

• Keywords of "Structural evolution and effects of calcium doping on nanophasic LaCoO3 powders prepared by non-alkoxidic sol-gel technique" (Insieme di parole chiave)