Microstructure and optical vibration features of complex cobalt molybdates synthesized by the microwave and conventional hydrothermal processes

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dc.creatorGuilherme Mendes Martins
dc.creatorRoberto Luiz Moreira
dc.creatorAnderson Dias
dc.date.accessioned2023-11-30T16:57:24Z
dc.date.accessioned2025-09-09T00:42:40Z
dc.date.available2023-11-30T16:57:24Z
dc.date.issued2020
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.description.sponsorshipFINEP - Financiadora de Estudos e Projetos, Financiadora de Estudos e Projetos
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.vibspec.2020.103107
dc.identifier.issn0924-2031
dc.identifier.urihttps://hdl.handle.net/1843/61571
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofVibrational Spectroscopy
dc.rightsAcesso Restrito
dc.subjectCompostos de molibdênio
dc.subjectCobalto
dc.subjectRaman, Espectroscopia de
dc.subjectMicroondas
dc.subject.otherNatrochalcite
dc.subject.otherHydroxy molybdates
dc.subject.otherMicrowave
dc.subject.otherHydrothermal
dc.titleMicrostructure and optical vibration features of complex cobalt molybdates synthesized by the microwave and conventional hydrothermal processes
dc.typeArtigo de periódico
local.citation.spage103107
local.citation.volume109
local.description.resumoComplex cobalt molybdates were prepared by conventional (CH) and microwave-assisted (MW) hydrothermal methods. Structural, morphological and vibrational properties of the obtained NaCo2(H3O2)(MoO4)2 and Co2(MoO4)(OH)2 materials were investigated. The first compound was obtained as majority phase for all tested MW processing conditions; conversely, for the CH method the second composition (desodiated) was the majority phase. Phase-pure, round-shaped Co2(MoO4)(OH)2 was obtained by CH processing in the temperature range 150−250 °C, for 24 h. On the other hand, the MW process produced micrometer-size rods with high anisotropy. Raman spectroscopic analysis of the monoclinic NaCo2(H3O2)(MoO4)2 materials, using conventional peak fitting procedures to resolve the vibrational modes, showed a good agreement between experimental results and group theory predictions. Raman spectra of the orthorhombic Co2(MoO4)(OH)2 showed similarities with the spectra of other hydroxy molybdates.
local.identifier.orcidhttps://orcid.org/0000-0001-7620-6708
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0924203120301119

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