First example of ZnO-TiO2 nanocomposites by chemical vapor deposition: Structure, morphology, composition, and gas sensing performances (Articolo in rivista)

Type
Label
  • First example of ZnO-TiO2 nanocomposites by chemical vapor deposition: Structure, morphology, composition, and gas sensing performances (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/cm701990f (literal)
Alternative label
  • a- Barreca, D; b- Comini, E; c- Ferrucci, AP; c- Gasparotto, A; c- Maccato, C; c- Maragno, C; b- Sberveglieri, G; c- Tondello, E (2007)
    First example of ZnO-TiO2 nanocomposites by chemical vapor deposition: Structure, morphology, composition, and gas sensing performances
    in Chemistry of materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • a- Barreca, D; b- Comini, E; c- Ferrucci, AP; c- Gasparotto, A; c- Maccato, C; c- Maragno, C; b- Sberveglieri, G; c- Tondello, E (literal)
Pagina inizio
  • 5642 (literal)
Pagina fine
  • 5649 (literal)
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  • http://pubs.acs.org/doi/abs/10.1021/cm701990f (literal)
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  • 19 (literal)
Rivista
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  • 8 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1, ISTM-CNR and INSTM, Department of Chemistry, Padova University, Via Marzolo, 1-35131 Padova, Italy 2,7 : INFM-CNR, SENSOR, Department of Chemistry and Physics, Brescia University, Via Valotti, 9-25133 Brescia, Italy 3-6,8 : Department of Chemistry, Padova University and INSTM, Via Marzolo, 1-35131 Padova, Italy (literal)
Titolo
  • First example of ZnO-TiO2 nanocomposites by chemical vapor deposition: Structure, morphology, composition, and gas sensing performances (literal)
Abstract
  • ZnO-TiO2 nanocomposites were synthesized by an innovative chemical vapor deposition (CVD) strategy, based on the initial growth of ZnO nanoplatelets (host) and the subsequent dispersion of TiO2 nanoparticles (guest). Ti((OPr)-Pr-i)(2)(dpm)(2) and Zn(hfa)(2)center dot TMEDA ((OPr)-Pr-i: iso-propoxy; dpm: 2,2,6,6-tetramethyl-3,5-heptanedionate; hfa: 1, 1, 1,5,5,5-hexafluoro-2,4-pentanedionate; and TMEDA: N,N,N',N'-tetramethyl-ethylenediamine) were adopted as Ti and Zn molecular sources, respectively. The syntheses were performed in nitrogen plus wet oxygen atmospheres at relatively low temperatures (350-400 degrees C) on Si(100) and Al-2,O-3 substrates, avoiding ex-situ thermal treatment to preserve the chemical identity of the host and,(guest phases. The process resulted in the formation of ZnO-TiO2 nanocomposite deposits with an average thickness of 140 nm, whose characteristics were directly affected by the host matrix porosity and the 0 Pest amount and dispersion, tailored by varying the TiO2 deposition time. In this framework, particular attention was devoted to the investigation of the composite chemico-physical properties as a function of the adopted processing parameters. Furthermore, the gas sensing performances of the nanocomposites in the detection of volatile organic compounds (CH3COCH3, CH3CH2OH, and CO) resulted in being directly dependent on their composition and morphology, revealing better performances than the pristine ZnO systems. These results disclose intriguing perspectives for the development of sensing devices for environmental purposes and food control monitoring. (literal)
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