3.1 Estancias en cooperación internacional

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https://hdl.handle.net/20.500.12390/3674

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Browsing 3.1 Estancias en cooperación internacional by Author "rp00678"
  • Publication
    Vacancy ordered gamma-Fe2O3 nanoparticles functionalized with nanohydroxyapatite: XRD, FTIR, TEM, XPS and Mossbauer studies
    (Elsevier B.V., 2016)
    Guivar, JAR
    ;
    Sanches, EA
    ;
    Bruns, F
    ;
    Sadrollahi, E
    ;
    Morales, MA
    ;
    Lopez, EO
    ;
    Litterst, FJ
    Vacancy ordered maghemite (γ-Fe2O3) nanoparticles functionalized with nanohydroxyapatite (HAp – Ca10(PO4) 6(OH)2) have been successfully synthesized using an inexpensive co-precipitation chemical route. Evidence for the presence of vacancy order in maghemite was shown by the superstructure lines observed in X-ray diffraction. The adsorption of carboxyl groups of citric acid (C6H8O7) onto γ-Fe2O3 nanoparticles was investigated by FTIR, XPS and Mössbauer spectroscopy.
  • Publication
    Vacancy ordered γ-Fe 2 O 3 nanoparticles functionalized with nanohydroxyapatite: XRD, FTIR, TEM, XPS and Mössbauer studies
    (Elsevier, 2016)
    Ramos Guivar J.A.
    ;
    Sanches E.A.
    ;
    Bruns F.
    ;
    Sadrollahi E.
    ;
    Morales M.A.
    ;
    López E.O.
    ;
    Litterst F.J.
    Vacancy ordered maghemite (γ-Fe2O3) nanoparticles functionalized with nanohydroxyapatite (HAp – Ca10(PO4) 6(OH)2) have been successfully synthesized using an inexpensive co-precipitation chemical route. Evidence for the presence of vacancy order in maghemite was shown by the superstructure lines observed in X-ray diffraction. The adsorption of carboxyl groups of citric acid (C6H8O7) onto γ-Fe2O3 nanoparticles was investigated by FTIR, XPS and Mössbauer spectroscopy. From XPS surface analysis, two binding energies related to oxygen were attributed to bindings between C6H8O7/γ- Fe2O3 and C6H8O7/HAp from an interfacial reaction promoted by strongly adsorbed H2O molecules at the surface of these nanomaterials.