Oxidative desulfurization of dibenzothiophene over highly dispersed Mo-doped graphitic carbon nitride

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dc.creatorDiogo Augusto Fonseca Gonçalves
dc.creatorMauricio Veloso Brant Pinheiro
dc.creatorKlaus Wilhelm Heinrich Krambrock
dc.creatorRodrigo Ribeiro Resende
dc.creatorBreno Rodrigues Lamaghere Galvão
dc.creatorEudes Lorençon
dc.date.accessioned2025-02-24T18:54:43Z
dc.date.accessioned2025-09-09T00:18:16Z
dc.date.available2025-02-24T18:54:43Z
dc.date.issued2022
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1007/s11696-022-02113-3
dc.identifier.issn2585-7290
dc.identifier.urihttps://hdl.handle.net/1843/80372
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofChemical Papers
dc.rightsAcesso Restrito
dc.subjectNitreto de carbono
dc.subjectDessulfuração
dc.subject.otherGraphitic carbon nitride
dc.subject.otherOxidative desulfurization
dc.subject.otherDibenzothiophene
dc.titleOxidative desulfurization of dibenzothiophene over highly dispersed Mo-doped graphitic carbon nitride
dc.typeArtigo de periódico
local.citation.epage3412
local.citation.issue6
local.citation.spage3401
local.citation.volume76
local.description.resumoMo-doped graphitic carbon nitride (Mo/g-C3N4) was successfully prepared by thermal condensation of a Mo/melamine precursor in a semi-closed alumina crucible at 550 °C without atmosphere. Thermogravimetric analysis (TGA) was used to evaluate the polymerization route of the precursor, and theoretical and experimental investigations revealed that the Mo species were likely dispersed and anchored to the pyridinic groups of g-C3N4. As a result, the obtained Mo/g-C3N4 displayed exceptional catalytic activity in the oxidative desulfurization of dibenzothiophene (DBT) with H2O2. The effects of catalyst dosage, O/S ratio, and temperature on the catalytic properties of Mo/g-C3N4 were investigated. The kinetic studies revealed a pseudo-first-order kinetic process for DBT oxidation with an apparent activation energy of 43.6 kJ mol−1. Experimental and theoretical evaluation of the Mo/g-C3N4 stability suggests that catalytically active Mo species are progressively leached from the g-C3N4 structure. The decrease in the Mo–N bond order after forming reactive peroxo-Mo(VI) groups was associated with catalyst deactivation.
local.identifier.orcidhttps://orcid.org/0000-0001-5722-6260
local.identifier.orcidhttps://orcid.org/0000-0002-7562-0285
local.identifier.orcidhttps://orcid.org/0000-0002-2003-0739
local.identifier.orcidhttps://orcid.org/0000-0002-4184-2437
local.identifier.orcidhttps://orcid.org/0000-0003-2274-4572
local.publisher.countryBrasil
local.publisher.departmentICB - DEPARTAMENTO DE BIOQUÍMICA E IMUNOLOGIA
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s11696-022-02113-3

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