Interaction of gold with co-condensed and grafted HMS-SH silica: study by 29Si(1H) CP-MAS-NMR,XRD,XPS and Au LIII EXAFS (Articolo in rivista)

Type
Label
  • Interaction of gold with co-condensed and grafted HMS-SH silica: study by 29Si(1H) CP-MAS-NMR,XRD,XPS and Au LIII EXAFS (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/eijc.201000427 (literal)
Alternative label
  • V. La Parola, A. Longo, A.M. Venezia, A. Spinella, E. Caponetti (2010)
    Interaction of gold with co-condensed and grafted HMS-SH silica: study by 29Si(1H) CP-MAS-NMR,XRD,XPS and Au LIII EXAFS
    in European journal of inorganic chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • V. La Parola, A. Longo, A.M. Venezia, A. Spinella, E. Caponetti (literal)
Pagina inizio
  • 3628 (literal)
Pagina fine
  • 3635 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISMN-CNR, Via Ugo La Malfa 153, 90146 Palermo, Italy Centro Grandi Apparecchiature, Università di Palermo, Via Marini 14, 90128 Palermo, Italy Dipartimento di Chimica Fisica, Università di Palermo, Parco d'Orleans II, Viale delle Scienze pad. 17, 90128 Palermo, Italy (literal)
Titolo
  • Interaction of gold with co-condensed and grafted HMS-SH silica: study by 29Si(1H) CP-MAS-NMR,XRD,XPS and Au LIII EXAFS (literal)
Abstract
  • Hexagonal mesoporous silica (HMS) is functionalised with mercaptopropyl groups by adopting two different pro-cedures; co-condensation and grafting. In both cases tetra-ethylorthosilicate (TEOS) and 3-mercaptopropyltriethoxysil-ane (3-MPTES) are used as the silicon and sulfur precursors, respectively. The obtained materials are analysed by several techniques such as N2sorption, TG-DTA, XRD, SAXS and-solid state 29Si {1H} CP-MAS NMR spectroscopy. By taking advantage of the chemical interaction between gold and the -SH groups, the effect of the thiol addition procedure on the supporting capability of the functionalised silica is evalu-ated by depositing gold through the incipient wet impregna-tion technique. The influence of the functionalisation method on the electronic structure of gold and on its surface distribu-tion is determined by extended X-ray fine absorption spectra (EXAFS) of Au at the LIII edge and by X-ray photoelectron spectroscopy (XPS). (literal)
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