Peroxidation and photo-peroxidation of pantoprazole in aqueous solution using silver molybdate as catalyst

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dc.creatorDaniela Gier Della Rocca
dc.creatorHenrique Fernandes Vieira Victoria
dc.creatorCamilla Daniela Moura Nickel
dc.creatorGidiane Scaratti
dc.creatorKlaus Wilhelm Heinrich Krambrock
dc.creatorAgenor De Noni Junior
dc.creatorVítor Jorge Pais Vilar
dc.creatorHumberto Jorge José
dc.creatorRegina de Fátima Peralta Muniz Moreira
dc.date.accessioned2025-02-25T15:27:02Z
dc.date.accessioned2025-09-08T23:37:08Z
dc.date.available2025-02-25T15:27:02Z
dc.date.issued2021
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.chemosphere.2020.127671
dc.identifier.issn0045-6535
dc.identifier.urihttps://hdl.handle.net/1843/80416
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofChemosphere
dc.rightsAcesso Aberto
dc.subjectFotocatálise
dc.subjectOxidação
dc.subject.otherPhotocatalysis
dc.subject.otherAdvanced oxidation processes
dc.subject.otherPharmaceuticals
dc.titlePeroxidation and photo-peroxidation of pantoprazole in aqueous solution using silver molybdate as catalyst
dc.typeArtigo de periódico
local.citation.epage9
local.citation.spage1
local.citation.volume262
local.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.
local.identifier.orcidhttps://orcid.org/0000-0002-4465-9662
local.identifier.orcidhttps://orcid.org/0000-0002-4846-2189
local.identifier.orcidhttps://orcid.org/0000-0001-8298-3634
local.identifier.orcidhttps://orcid.org/0000-0002-1992-2916
local.identifier.orcidhttps://orcid.org/0000-0002-7562-0285
local.identifier.orcidhttps://orcid.org/0000-0001-9713-5283
local.identifier.orcidhttps://orcid.org/0000-0003-0943-2144
local.identifier.orcidhttps://orcid.org/0000-0002-9219-0942
local.identifier.orcidhttps://orcid.org/0000-0002-2863-7260
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S004565352031866X?via%3Dihub

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