Hexagonal-Nb2O5/Anatase-TiO2 mixtures and their applications in the removal of Methylene Blue dye under various conditions

Página do item simplificado
dc.contributor.authorFerraz, Nathalia Pereira [UNIFESP]
dc.contributor.authorMarcos, Francielle Candian Firmino
dc.contributor.authorNogueira, André Esteves
dc.contributor.authorMartins, Alysson Stefan
dc.contributor.authorLanza, Marcos Roberto de Vasconcelos
dc.contributor.authorAssaf, Elisabete Moreira
dc.contributor.authorAsencios, Yvan Jesus Olortiga [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2019-08-19T11:49:36Z
dc.date.available2019-08-19T11:49:36Z
dc.date.issued2017
dc.description.abstractTo the best of our knowledge, catalysts based on mixtures of Hexagonal-Nb2O5/Anatase-TiO2 have not been well studied yet. In this sense, the aim of the present study was to synthesize, characterize and explore the catalytic activity of Hexagonal-Nb2O5/Anatase-TiO2 catalysts in the removal of Methylene Blue dye, MB (used as model molecule of organic pollutant in aqueous solution), under UV-light (253.7 nm), Visible-light (400–700 nm) and Visible-light (400–700 nm) plus H2O2. The influence of the Hexagonal-Nb2O5 on the activity of a commercial TiO2 (Rutile/Anatase) was evaluated. The catalysts were characterized by various techniques; XRD, H2-TPR, BET, EDX, DRS and SEM. Our results show that the presence of Hexagonal-Nb2O5 hinders the Anatase-to-Rutile phase transformation of TiO2, sensitizes and enhances the photocatalytic activity of the commercial TiO2 under white-light. The best catalyst was the sample with 60 wt % of Nb2O5 (0.6NbTi sample), showing the highest removal values of MB in aqueous solutions under white-light and white-light plus H2O2. Additionally, the present paper shows a new route to obtain a single hexagonal phase of Nb2O5 using Niobium Ammoniacal Oxalate by a simple and economic route.en
dc.description.affiliationUniv Fed São Paulo, Inst Mar, Rua Dr Carvalho Mendonca 144, BR-11070100 Santos, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Quim Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil
dc.description.affiliationEMBRAPA Instrumentacao, Empresa Brasileira Pesquisa Agr, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUnifespUniv Fed São Paulo, Inst Mar, Rua Dr Carvalho Mendonca 144, BR-11070100 Santos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt
dc.description.sponsorshipBrazilian Metals and Mining Company (CBMM)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.description.sponsorshipIDFAPESP: 2014/24940-5pt
dc.format.extent331-340
dc.identifierhttps://dx.doi.org/10.1016/j.matchemphys.2017.06.029
dc.identifier.citationMaterials Chemistry And Physics. Lausanne, v. 198, p. 331-340, 2017.
dc.identifier.doi10.1016/j.matchemphys.2017.06.029
dc.identifier.issn0254-0584
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/51358
dc.identifier.wosWOS:000407408600042
dc.language.isoeng
dc.publisherElsevier Science Sa
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectHexagonal-Nb2O5/Anatase-TiO2en
dc.subjectAnatase-to-Rutile phase transformationen
dc.subjectSensitizationen
dc.subjectMethylene Blue dyeen
dc.subjectRemovalen
dc.subjectPhotocatalytic activityen
dc.titleHexagonal-Nb2O5/Anatase-TiO2 mixtures and their applications in the removal of Methylene Blue dye under various conditionsen
dc.typeinfo:eu-repo/semantics/article
Arquivos
Coleções
IMar - Artigos