Insights of the formation mechanism of nanostructured titanium oxide polymorphs from different macromolecular metal-complex precursors

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dc.contributor.authorAllende, Patricio
dc.contributor.authorOrera, Alodia
dc.contributor.authorLaguna-Bercero, Miguel A.
dc.contributor.authorLuisa Valenzuela, Maria
dc.contributor.authorDiaz, Carlos
dc.contributor.authorBarrientos, Lorena
dc.date.accessioned2025-01-20T22:13:51Z
dc.date.available2025-01-20T22:13:51Z
dc.date.issued2021
dc.description.abstractThe insight into the mechanism of the unprecedented formation of pure anatase TiO2 from the macromolecular (Chitosan)center dot(TiOSO4)(n) precursor has been investigated using micro Raman spectroscopy, Scanning Electron Microscopy (SEM) and thermogravimetric/differential thermal analysis (TGA/DTA). The formation of a graphitic film was observed upon annealing of the macromolecular precursor, reaching a maximum at about 500 degrees C due to decomposition of the polymeric chain of the Chitosan and (PS-co-4-PVP) polymers. The proposed mechanism is the nucleation and growth of TiO2 nanoparticles over this graphitic substrate. SEM and Raman measurements confirm the formation of TiO2 anatase around 400 degrees C. The observation of an exothermic peak around 260 degrees C in the TGA/DTA measurements confirms the decomposition of carbon chains to form graphite. Another exothermic peak around 560 degrees C corresponds to the loss of additional carbonaceous residues.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.heliyon.2021.e07684
dc.identifier.eissn2405-8440
dc.identifier.urihttps://doi.org/10.1016/j.heliyon.2021.e07684
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94461
dc.identifier.wosidWOS:000687269000005
dc.issue.numero7
dc.language.isoen
dc.revistaHeliyon
dc.rightsacceso restringido
dc.subjectChitosan
dc.subjectTiO2
dc.subjectAnatase
dc.subjectTGA/DTA
dc.subjectRaman spectroscopy
dc.subject.ods02 Zero Hunger
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa02 Hambre cero
dc.subject.odspa03 Salud y bienestar
dc.titleInsights of the formation mechanism of nanostructured titanium oxide polymorphs from different macromolecular metal-complex precursors
dc.typeartículo
dc.volumen7
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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