Magnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in water

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dc.contributor.authorJorgetto, Alexandre de Oliveira [UNESP]
dc.contributor.authorMilbrat, Alexander
dc.contributor.authorSchneider, José Fabián
dc.contributor.authorLi, Zheng
dc.contributor.authorGiammaria, Guido
dc.contributor.authorSaeki, Margarida Juri [UNESP]
dc.contributor.authorGianeti, Thiago Marcelo Ribeiro [UNESP]
dc.contributor.authorLima, Giuseppina Pace Pereira [UNESP]
dc.contributor.authorPedrosa, Valber de Albuquerque [UNESP]
dc.contributor.authorMul, Guido
dc.contributor.authorCastro, Gustavo Rocha de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Twente
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:37:38Z
dc.date.available2018-12-11T17:37:38Z
dc.date.issued2018-11-01
dc.description.abstractThis work addresses the development of a magnetically extractable magnetite-silica-titania photocatalyst to be applied in the degradation of organic compounds in water. MCM-41 silica was successfully deposited on magnetite, providing large surface area for anchoring of TiOx species, and preventing thermally induced conversion of magnetite to hematite. A good correlation between the calculated values and amount of titania deposited on the silica-covered magnetite particles was obtained for a synthesis route involving the treatment of magnetite-silica in boiling ethanolic Ti-precursor solution. Photocatalytic activity in conversion of 4-chlorophenol could only be observed for compositions containing larger than ∼50 wt% titania, whereas increasing the titania content did not significantly improve performance. Experiments carried out at pH ∼ 3.0 and ∼7.2 demonstrated the performance is relatively pH-independent. The structure activity-correlation of the materials is briefly discussed.en
dc.description.affiliationUniversidade Estadual Paulista/UNESP Departamento de Química e Bioquímica – Instituto de Biociências (IB), Caixa Postal 510
dc.description.affiliationPhotocatalytic Synthesis Group MESA+ Institute for Nanotechnology Faculty of Science and Technology University of Twente, Meander 229, P.O. Box 217
dc.description.affiliationInstituto de Física de São Carlos (IFSC) Universidade de São Paulo (USP)
dc.description.affiliationCatalytic Processes and Materials MESA+ Faculty of Science and Technology University of Twente, P.O. Box 217
dc.description.affiliationUniversidade Estadual Paulista/UNESP Laboratório Central – Faculdade de Ciências Agronômicas (FCA), Caixa Postal 1780
dc.description.affiliationUnespUniversidade Estadual Paulista/UNESP Departamento de Química e Bioquímica – Instituto de Biociências (IB), Caixa Postal 510
dc.description.affiliationUnespUniversidade Estadual Paulista/UNESP Laboratório Central – Faculdade de Ciências Agronômicas (FCA), Caixa Postal 1780
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 120112/2013-2
dc.description.sponsorshipIdFAPESP: 2013/22955-2
dc.description.sponsorshipIdFAPESP: 2015/05224-0
dc.format.extent121-133
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2018.06.218
dc.identifier.citationApplied Surface Science, v. 457, p. 121-133.
dc.identifier.doi10.1016/j.apsusc.2018.06.218
dc.identifier.file2-s2.0-85049350814.pdf
dc.identifier.issn0169-4332
dc.identifier.lattes1802982806436894
dc.identifier.scopus2-s2.0-85049350814
dc.identifier.urihttp://hdl.handle.net/11449/180004
dc.language.isoeng
dc.relation.ispartofApplied Surface Science
dc.relation.ispartofsjr1,093
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAdvanced oxidation process
dc.subjectAnatase crystal growth
dc.subjectMagnetic extraction
dc.subjectMCM-41 silica
dc.subjectPhotocatalysis
dc.subjectTitania coating
dc.titleMagnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in wateren
dc.typeArtigo
unesp.author.lattes1802982806436894
unesp.author.orcid0000-0003-0178-302X[2]

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