Caracterização textural e estrutural de V 2O 5/TiO 2 obtidos via sol-gel: Comparação entre secagem convencional e supercrítica

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorRodella, Cristiane B.
dc.creatorNunes, Luis A. O.
dc.creatorSaeki, Margarida Juri
dc.creatorPadilha, Pedro M.
dc.creatorFlorentino, Ariovaldo O.
dc.date2014-05-27T11:20:25Z
dc.date2016-10-25T18:17:41Z
dc.date2014-05-27T11:20:25Z
dc.date2016-10-25T18:17:41Z
dc.date2002-03-01
dc.date.accessioned2017-04-06T01:02:07Z
dc.date.available2017-04-06T01:02:07Z
dc.identifierQuimica Nova, v. 25, n. 2, p. 209-213, 2002.
dc.identifier0100-4042
dc.identifierhttp://hdl.handle.net/11449/66838
dc.identifierhttp://acervodigital.unesp.br/handle/11449/66838
dc.identifier10.1590/S0100-40422002000200007
dc.identifierS0100-40422002000200007
dc.identifierWOS:000174692100007
dc.identifier2-s2.0-0036519768.pdf
dc.identifier2-s2.0-0036519768
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422002000200007
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/888355
dc.descriptionThis work describes a modified sol-gel method for the preparation of V 2O 5/TiO 2 catalysts. The samples have been characterized by N 2 adsorption at 77K, x-ray diffractometry (XRD) and Fourier Transform Infrared (FT-IR). The surface area increases with the vanadia loading from 24 m 2 g -1, for pure TiO 2, to 87 m 2 g -1 for 9wt.% of V 2O 5. The rutile form is predominant for pure TiO 2 but became enriched with anatase phase when vanadia loading is increased. No crystalline V 2O 5 phase was observed in the catalysts diffractograms. Two species of surface vanadium observed by FT-IR spectroscopy a monomeric vanadyl and polymeric vanadates, the vanadyl/vanadate ratio remains practically constant.
dc.languagepor
dc.relationQuímica Nova
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCatalyst
dc.subjectSol-gel
dc.subjectVanadium and titanium oxide
dc.subjectmonomer
dc.subjectnitrogen
dc.subjectpolymer
dc.subjecttitanium dioxide
dc.subjectvanadic acid
dc.subjectvanadium derivative
dc.subjectvanadium pentoxide
dc.subjectvanadyl derivative
dc.subjectadsorption
dc.subjectcatalyst
dc.subjectcrystallization
dc.subjectgel
dc.subjectinfrared spectroscopy
dc.subjectintermethod comparison
dc.subjectmethodology
dc.subjectphase transition
dc.subjectspecies differentiation
dc.subjectsurface property
dc.subjectX ray diffraction
dc.titleCaracterização textural e estrutural de V 2O 5/TiO 2 obtidos via sol-gel: Comparação entre secagem convencional e supercrítica
dc.typeOtro


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