Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors
Díaz, C. ; Valenzuela, M.L. ; Laguna-Bercero, M.A. (Universidad de Zaragoza) ; Orera, A. (Universidad de Zaragoza) ; Bobadilla, D. ; Abarca, S. ; Peña, O.
Resumen: The simple reaction of chitosan with metallic salts yields (chitosan) (MLn)x, MLn = MnCl2, CoCl2, NiCl2, macromolecular complexes which, after a thermal treatment at 800 °C under air, give nanostructured Mn2O3, Co3O4 and NiO. The polymer acts as a template in the solid state, which is eliminated after the combustion process. At an intermediate stage, a layered graphitic carbon matrix was observed by HRTEM over the grown metal oxides. A mechanism for the growth of nanostructured oxides is discussed, including Raman studies. The nanostructured Mn2O3, Co3O4 and NiO particles grow over graphite layers and the solid-state role of chitosan is crucial for the formation of this graphite substrate. An antiferromagnetic transition was observed in Co3O4 nanoparticles, with TN = 38 K, whereas NiO nanoparticles behave as a superparamagnetic material with a blocking temperature above 300 K.
Idioma: Inglés
DOI: 10.1039/c7ra00782e
Año: 2017
Publicado en: RSC Advances 7, 44 (2017), 27729-27736
ISSN: 2046-2069
Factor impacto JCR: 2.936 (2017)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 71 / 171 = 0.415 (2017) - Q2 - T2
Factor impacto SCIMAGO: 0.863 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2019-07-09-11:36:42)
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Idioma: Inglés
DOI: 10.1039/c7ra00782e
Año: 2017
Publicado en: RSC Advances 7, 44 (2017), 27729-27736
ISSN: 2046-2069
Factor impacto JCR: 2.936 (2017)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 71 / 171 = 0.415 (2017) - Q2 - T2
Factor impacto SCIMAGO: 0.863 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2019-07-09-11:36:42)
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Record created 2017-09-15, last modified 2019-07-09