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Use este identificador para citar o ir al link de este elemento: http://hdl.handle.net/1843/80416
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Campo DCValorIdioma
dc.creatorDaniela Gier Della Roccapt_BR
dc.creatorHenrique Fernandes Vieira Victoriapt_BR
dc.creatorCamilla Daniela Moura Nickelpt_BR
dc.creatorGidiane Scarattipt_BR
dc.creatorKlaus Wilhelm Heinrich Krambrockpt_BR
dc.creatorAgenor De Noni Juniorpt_BR
dc.creatorVítor Jorge Pais Vilarpt_BR
dc.creatorHumberto Jorge Josépt_BR
dc.creatorRegina de Fátima Peralta Muniz Moreirapt_BR
dc.date.accessioned2025-02-25T15:27:02Z-
dc.date.available2025-02-25T15:27:02Z-
dc.date.issued2021-
dc.citation.volume262pt_BR
dc.citation.spage1pt_BR
dc.citation.epage9pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.chemosphere.2020.127671pt_BR
dc.identifier.issn0045-6535pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/80416-
dc.description.resumoIn this study, silver molybdate was used as a catalyst in different oxidation processes to degrade pantoprazole (PAN) from aqueous suspension. The catalyst was synthesized using a controlled precipitation method and characterized by XRD, FTIR spectroscopy, BET analysis, Zeta potential, FEG-SEM/EDS, DRS and EPR. The α- and β-phases of Ag2MoO4 were identified as crystalline structure of the butterfly-shaped particles. The metastable α-phase could be completely converted into β-Ag2MoO4 by thermal treatment at 300 °C. The band gap energy of β-Ag2MoO4 (Eg = 3.25 eV) is slightly higher than for as-prepared catalyst (α-Ag2MoO4 + β-Ag2MoO4) (Eg = 3.09 eV), suggesting that as-prepared catalyst should be active under visible light. PAN is sensible to UV light irradiation, and the addition of H2O2 as electron acceptor enhanced the mineralization rate. In the catalytic UV-based reactions, high PAN oxidation efficiencies were obtained (>85%) but with low mineralization (32-64%). Catalytic peroxidation and photo-catalytic peroxidation under visible light showed the highest PAN oxidation efficiency, leading to its almost complete mineralization (>95%), even under dark conditions (98% in 120 min). Several degradation byproducts were identified and three mechanistic routes of PAN decomposition were proposed. The identified byproducts are less toxic than the parent compound. EPR coupled with the spin trapping method identified •OH radicals as the main ROS species in both photocatalytic and catalytic peroxidation reactions. Ag2MoO4 showed to be a promising catalyst to promote the decomposition of hydrogen peroxide into ROS.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofChemospherept_BR
dc.rightsAcesso Abertopt_BR
dc.subjectPhotocatalysispt_BR
dc.subjectAdvanced oxidation processespt_BR
dc.subjectPharmaceuticalspt_BR
dc.subject.otherFotocatálisept_BR
dc.subject.otherOxidaçãopt_BR
dc.titlePeroxidation and photo-peroxidation of pantoprazole in aqueous solution using silver molybdate as catalystpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S004565352031866X?via%3Dihubpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4465-9662pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4846-2189pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-8298-3634pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1992-2916pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7562-0285pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9713-5283pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0943-2144pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9219-0942pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2863-7260pt_BR
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