Thin films of cubic mesoporous aluminophosphates modified by silicon and manganese

dc.creatorCecowski, Sasa
dc.creatorTusar, Natasa Novak
dc.creatorRangus, Mojca
dc.creatorMali, Gregor
dc.creatorSoler Illia, Galo Juan de Avila Arturo
dc.creatorKaucic, Venceslav
dc.date2010-11
dc.identifierhttp://hdl.handle.net/11336/98835
dc.identifierCecowski, Sasa; Tusar, Natasa Novak; Rangus, Mojca; Mali, Gregor; Soler Illia, Galo Juan de Avila Arturo; et al.; Thin films of cubic mesoporous aluminophosphates modified by silicon and manganese; Elsevier Science; Microporous and Mesoporous Materials; 135; 1-3; 11-2010; 161-169
dc.identifier1387-1811
dc.identifierCONICET Digital
dc.identifierCONICET
dc.descriptionMesoporous aluminophosphate thin films and xerogels with ordered three-dimensional pore arrangement, modified by silicon or silicon and manganese, were synthesized. Aluminophosphate reaction mixtures were templated with non ionic polymer surfactant Pluronic F127 and deposited as thin layers of precursor solution on Petri dishes for xerogels and on glass substrates for thin films. Surfactant removal was investigated by thermal analysis. Small Angle X-ray Scattering measurements showed that calcined silicoaluminophosphate (SAPO) and manganese silicoaluminophosphate (MnSAPO) thin films have highly ordered mesostructures, which remain stable up to at least 400°C. The mesostructures exhibit cubic symmetry described by an Im3̄m space group. Cubic mesostructure was confirmed also by TEM, SEM and AFM microscopy. Incorporation of silicon and manganese into the aluminophosphate framework was studied by solid-state NMR and X-ray absorption spectroscopy. Silicon-rich domains were detected in calcined SAPO and MnSAPO xerogels and in MnSAPO thin films. The observation of Si(OSi)3(OAl) framework units at the border of such domains suggests that acid sites might be included within silicoaluminophosphate walls. Mn3+ and Mn2+ cations are present in the MnSAPO frameworks of calcined xerogels and thin films in the molar ratio of 40%/60%. Manganese cations are coordinated to four oxygen atoms, suggesting that they are incorporated within the framework and that they can act as framework redox sites.
dc.descriptionFil: Cecowski, Sasa. National Institute Of Chemistry; Eslovenia
dc.descriptionFil: Tusar, Natasa Novak. National Institute Of Chemistry; Eslovenia
dc.descriptionFil: Rangus, Mojca. National Institute Of Chemistry; Eslovenia
dc.descriptionFil: Mali, Gregor. National Institute Of Chemistry; Eslovenia
dc.descriptionFil: Soler Illia, Galo Juan de Avila Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
dc.descriptionFil: Kaucic, Venceslav. National Institute Of Chemistry; Eslovenia
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherElsevier Science
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S138718111000226X
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.micromeso.2010.07.005
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectAFM
dc.subjectEXAFS
dc.subjectNMR
dc.subjectSILICON AND MANGANESE MODIFIED CUBIC MESOPOROUS ALUMINOPHOSPHATE
dc.subjectTHIN FILMS
dc.subjecthttps://purl.org/becyt/ford/1.4
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleThin films of cubic mesoporous aluminophosphates modified by silicon and manganese
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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