Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant

Detalhes bibliográficos
Autor(a) principal: Ricci, Gustavo P.
Data de Publicação: 2010
Outros Autores: Rocha, Zênis N., Nakagaki, Shirley, Castro, Kelly A. D. F., Crotti, A. E. Miller
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12018
Resumo: Texto completo: acesso restrito. p. 147–154
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spelling Ricci, Gustavo P.Rocha, Zênis N.Nakagaki, ShirleyCastro, Kelly A. D. F.Crotti, A. E. MillerRicci, Gustavo P.Rocha, Zênis N.Nakagaki, ShirleyCastro, Kelly A. D. F.Crotti, A. E. Miller2013-06-25T15:27:11Z20100926-860Xhttp://www.repositorio.ufba.br/ri/handle/ri/12018v. 389, n. 1-2Texto completo: acesso restrito. p. 147–154Novel alumina materials containing FeIII ions were prepared by the non-hydrolytic sol–gel route and applied as heterogeneous catalysts in the oxidation of hydrocarbons (cyclooctene and cyclohexane) by the green oxidant hydrogen peroxide. The synthetic route followed an alkyl halide elimination pathway, via etherolysis/condensation between AlCl3 and diisopropyl ether (iPr2O), in the presence of FeIII ions (FeIII:AlIII:iPr2O molar ratio ∼1:15:30). The obtained xerogel (designated FeAlO-50) was thermally treated at 400, 750, or 1100 °C (samples FeAlO-400, FeAlO-750, and FeAlO-1100, respectively), and the resulting materials were characterized by means of different techniques, such as thermal analyses (TG/DTA), ultraviolet–visible (UV–vis) and infrared (FTIR) absorption spectroscopy, X-ray powder diffraction (XRD) and electron paramagnetic resonance (EPR). The concentration of Brönsted acid sites (BAS) at the surface of the samples was also evaluated by adsorption–desorption of cyclohexylamine. The thermal treatments led to truly heterogeneous catalysts, and the FeAlO-1100 material furnished the highest substrate conversion values. The larger catalytic activity of FeAlO-1100 is probably due to the absence of BAS on its surface. Indeed, the other FeAlO samples presented high BAS concentration, and it is known that H2O2 can be non-productively decomposed in the presence of strong acid sites. The catalytic efficiency of FeAlO-1100 can be considered promising (96% cyclooctene and 22% cyclohexane conversions), while the selectivity cyclohexanone/cyclohexanol achieved in the oxidation of cyclohexane was 1.2 (molar ratio). The catalytic systems obtained here are advantageous because they involve the use of H2O2, a green oxidant, and the temperature employed for the oxidation reactions (50–55 °C) is milder than those reported in the literature for other heterogeneous catalyst/H2O2 systems.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-06-25T15:27:11Z No. of bitstreams: 1 1-s2.0-S0926860X10006654-main.pdf: 453549 bytes, checksum: fcacdef398d8b63e91a4f99af70a5caf (MD5)Made available in DSpace on 2013-06-25T15:27:11Z (GMT). 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dc.title.pt_BR.fl_str_mv Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
dc.title.alternative.pt_BR.fl_str_mv Applied Catalysis A: General
title Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
spellingShingle Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
Ricci, Gustavo P.
Iron(III)
Alumina
Non-hydrolytic sol–gel
Heterogeneous catalysis
Hydrogen peroxide
title_short Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
title_full Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
title_fullStr Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
title_full_unstemmed Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
title_sort Iron-alumina materials prepared by the non-hydrolytic sol–gel route: Synthesis, characterization and application in hydrocarbons oxidation using hydrogen peroxide as oxidant
author Ricci, Gustavo P.
author_facet Ricci, Gustavo P.
Rocha, Zênis N.
Nakagaki, Shirley
Castro, Kelly A. D. F.
Crotti, A. E. Miller
author_role author
author2 Rocha, Zênis N.
Nakagaki, Shirley
Castro, Kelly A. D. F.
Crotti, A. E. Miller
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Ricci, Gustavo P.
Rocha, Zênis N.
Nakagaki, Shirley
Castro, Kelly A. D. F.
Crotti, A. E. Miller
Ricci, Gustavo P.
Rocha, Zênis N.
Nakagaki, Shirley
Castro, Kelly A. D. F.
Crotti, A. E. Miller
dc.subject.por.fl_str_mv Iron(III)
Alumina
Non-hydrolytic sol–gel
Heterogeneous catalysis
Hydrogen peroxide
topic Iron(III)
Alumina
Non-hydrolytic sol–gel
Heterogeneous catalysis
Hydrogen peroxide
description Texto completo: acesso restrito. p. 147–154
publishDate 2010
dc.date.issued.fl_str_mv 2010
dc.date.accessioned.fl_str_mv 2013-06-25T15:27:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/12018
dc.identifier.issn.none.fl_str_mv 0926-860X
dc.identifier.number.pt_BR.fl_str_mv v. 389, n. 1-2
identifier_str_mv 0926-860X
v. 389, n. 1-2
url http://www.repositorio.ufba.br/ri/handle/ri/12018
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.apcata.2010.09.011
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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