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Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors

dc.contributor.authorDíaz C.
dc.contributor.authorValenzuela M.L.
dc.contributor.authorLaguna-Bercero M.A.
dc.contributor.authorOrera A.
dc.contributor.authorBobadilla D.
dc.contributor.authorAbarca S.
dc.contributor.authorPeña O.
dc.date.accessioned2020-09-02T22:16:47Z
dc.date.available2020-09-02T22:16:47Z
dc.date.issued2017
dc.identifier10.1039/c7ra00782e
dc.identifier.citation7, 44, 27729-27736
dc.identifier.issn20462069
dc.identifier.urihttps://hdl.handle.net/20.500.12728/4335
dc.descriptionThe 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. © 2017 The Royal Society of Chemistry.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.titleSynthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors
dc.typeArticle


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