Preparation and characterization of spherical silica-porphyrin catalysts obtained by the sol-gel methodology

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPapacidero, A. T.
dc.creatorRocha, L. A.
dc.creatorCaetano, B. L.
dc.creatorMolina, E.
dc.creatorSacco, W. C.
dc.creatorNassar, E. J.
dc.creatorMartinelli, Y.
dc.creatorMello, C.
dc.creatorNakagaki, S.
dc.creatorCiuffi, K. J.
dc.date2014-05-20T15:23:08Z
dc.date2016-10-25T17:56:59Z
dc.date2014-05-20T15:23:08Z
dc.date2016-10-25T17:56:59Z
dc.date2006-03-01
dc.date.accessioned2017-04-05T23:40:19Z
dc.date.available2017-04-05T23:40:19Z
dc.identifierColloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 275, n. 1-3, p. 27-35, 2006.
dc.identifier0927-7757
dc.identifierhttp://hdl.handle.net/11449/33976
dc.identifierhttp://acervodigital.unesp.br/handle/11449/33976
dc.identifier10.1016/j.colsurfa.2005.09.013
dc.identifierWOS:000235523100004
dc.identifierhttp://dx.doi.org/10.1016/j.colsurfa.2005.09.013
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/877980
dc.descriptionThis work describes the synthesis of a first-generation iron porphyrin catalyst entrapped in a silica matrix by the sol-gel route, leading to spherical particles. The catalyst was synthesized by the method of Stober, through hydrolysis and condensation of the alkoxysilane TEOS in a mixture of alcohol, water and ammonia, in the presence of the iron porphyrin Fe(TPP)Cl. The relation between particle morphology and catalytic activity of the different Fe(TPP)-SiO2, obtained using different H2O/silane molar ratios and ammonia concentrations in the xerogel syntheses, was studied.The obtained catalysts were characterized by UV-vis spectroscopy, NMR Si-29. thermogravimetric analysis and transmission electron microscopy. Their ability to catalyze (Z)-cyclooctene epoxidation and cyclohexane oxidation was tested using iodosylbenzene as oxygen donor; the oxidation products were analyzed by gas chromatography and the catalysts obtained in a form of particles spherical and monodispersed showed to be a promising catalytic system for selective oxidation. (c) 2005 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectsol-gel
dc.subjectiron porphyrin
dc.subjectspherical particles
dc.subjectsupported catalyst
dc.subjectcatalysis
dc.subjectoxidation
dc.subjectsilica
dc.titlePreparation and characterization of spherical silica-porphyrin catalysts obtained by the sol-gel methodology
dc.typeOtro


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