Effect of chemical potential on the structural modification of titanate-based photocatalysts: Fast dye degradation efficiency and adsorption power

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dc.contributor.authorPereira, Chrystopher A.M. [UNESP]
dc.contributor.authorAmoresi, Rafael A.C. [UNESP]
dc.contributor.authorTeixeira, Guilhermina F.
dc.contributor.authorOliveira, Regiane C.
dc.contributor.authorColeto Jr, Ubirajara
dc.contributor.authorda Luz, Angélica R. [UNESP]
dc.contributor.authorde Almeida, Priscila B.
dc.contributor.authorSimões, Alexandre Z. [UNESP]
dc.contributor.authorMonteiro Filho, Elias S. [UNESP]
dc.contributor.authorLongo, Elson
dc.contributor.authorPerazolli, Leinig A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionFederal Institute of São Paulo (IFSP)
dc.date.accessioned2023-07-29T16:08:47Z
dc.date.available2023-07-29T16:08:47Z
dc.date.issued2023-06-25
dc.description.abstractIn this work, the impact of the chemical potential of sodium hydroxide concentration was evaluated in the synthesis of titanate-based photocatalysts prepared by the microwave-assisted hydrothermal method. The materials were characterized by techniques that made it possible to unveil their structural, morphological, and electronic properties, corroborating the formation of a heterojunction of sodium titanate (Na2Ti6O13) and hydrated hydrogen titanate (H2Ti3O7·H2O). The results demonstrated that the increased chemical potential of NaOH caused an ionic exchange between Na+ and H+ ions, making the H2Ti3O7·H2O phase more stable. The oriented attachment (OA) growth mechanism was predominant, resulting in nanoparticles with nanosheet-like morphology. The photocatalytic efficiency of the materials was tested for the discoloration of Rhodamine B (RhB) and Methylene Blue (MB) dyes. The photocatalyst with the best efficiency showed a half-life time for RhB discoloration of only 5 min and a high capacity of adsorption in the MB medium (∼90% in 10 min). The details of the nanoparticle growth mechanism, the charge transport in the heterojunction, and the stability and reusability of the materials were clarified.en
dc.description.affiliationChemistry Institute São Paulo State University (UNESP), SP
dc.description.affiliationCenter for Engineering Modeling and Applied Social Sciences Federal University of ABC (UFABC), 5001 Dos Estados Avenue, SP
dc.description.affiliationFaculty of Engineering of Guaratinguetá (UNESP), SP
dc.description.affiliationChemistry Institute Federal University of Goiás (UFG), GO
dc.description.affiliationDepartment of Chemistry São Carlos Federal University (UFSCar), SP
dc.description.affiliationDepartment of Chemistry Federal Institute of São Paulo (IFSP), SP
dc.description.affiliationUnespChemistry Institute São Paulo State University (UNESP), SP
dc.description.affiliationUnespFaculty of Engineering of Guaratinguetá (UNESP), SP
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2023.169691
dc.identifier.citationJournal of Alloys and Compounds, v. 947.
dc.identifier.doi10.1016/j.jallcom.2023.169691
dc.identifier.issn0925-8388
dc.identifier.scopus2-s2.0-85150274502
dc.identifier.urihttp://hdl.handle.net/11449/249772
dc.language.isoeng
dc.relation.ispartofJournal of Alloys and Compounds
dc.sourceScopus
dc.subjectChemical potential
dc.subjectDye discoloration
dc.subjectMicrowave-assisted hydrothermal method
dc.subjectPhotocatalysts
dc.subjectTitanate-based nanosheets
dc.titleEffect of chemical potential on the structural modification of titanate-based photocatalysts: Fast dye degradation efficiency and adsorption poweren
dc.typeArtigo
unesp.departmentMateriais e Tecnologia - FEGpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências