Vacancy ordered γ-Fe 2 O 3 nanoparticles functionalized with nanohydroxyapatite: XRD, FTIR, TEM, XPS and Mössbauer studies

• Autores: Ramos Guivar J.A., Sanches E.A., Bruns F., Sadrollahi E., Morales M.A., López E.O., Litterst F.J.
• Formato: artículo
• Fecha de Publicación: 2016
• Institución: Consejo Nacional de Ciencia Tecnología e Innovación
• Repositorio: CONCYTEC-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.concytec.gob.pe:20.500.12390/816
• Enlace del recurso: https://hdl.handle.net/20.500.12390/816; https://doi.org/10.1016/j.apsusc.2016.07.157
• Nivel de acceso: acceso abierto
• Materia: X ray photoelectron spectroscopy; Binding energy; Hematite; Nanoparticles; Saturation magnetization; Surface analysis; Synthesis (chemical); Temperature distribution; X ray diffraction; https://purl.org/pe-repo/ocde/ford#2.10.01

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.