Hydrothermal synthesis and polarized micro-raman spectroscopy of copper molybdates

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dc.creatorGuilherme Mendes Martins
dc.creatorPâmela de Oliveira Coelho
dc.creatorRoberto Luiz Moreira
dc.creatorAnderson Dias
dc.date.accessioned2023-08-25T17:17:35Z
dc.date.accessioned2025-09-09T00:29:17Z
dc.date.available2023-08-25T17:17:35Z
dc.date.issued2018
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.ceramint.2018.04.032
dc.identifier.issn0272-8842
dc.identifier.urihttps://hdl.handle.net/1843/58256
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofCeramics International
dc.rightsAcesso Restrito
dc.subjectMaterial cerâmico
dc.subjectRaman, Espectroscopia de
dc.subjectCobre
dc.subjectRaios X - Difração
dc.subject.otherCeramics
dc.subject.otherRaman spectroscopy
dc.subject.otherCu3(MoO4)2(OH)2
dc.subject.otherLindgrenite
dc.subject.otherPolarized-resolved scattering
dc.titleHydrothermal synthesis and polarized micro-raman spectroscopy of copper molybdates
dc.typeArtigo de periódico
local.citation.epage12434
local.citation.issue11
local.citation.spage12426
local.citation.volume44
local.description.resumoConventional and microwave-assisted hydrothermal methods were used to synthesize Cu3(MoO4)2(OH)2 ceramics. Different experimental conditions of temperature, time and precipitation rate were employed to explore the growth mechanisms, structural and morphological properties of the obtained copper molybdates. The use of microwave-assisted reactors at 150 °C/10–30 min produced a mixture of copper molybdate hydrates, while only Cu3(MoO4)2(OH)2 was obtained by using microwave processing at longer times (above 120 min) or conventional hydrothermal reactors (110–250 °C/24 h). Experiments conducted after fast and slow coprecipitation rates resulted in different crystallographic phases and morphologies. Flower-like and rod-like micrometer-sized ceramics were produced with high anisotropy and single-crystalline nature. A better understanding on the growth mechanisms, as well as on the structural and morphological characteristics of copper molybdates was attained. Based upon the relative enhancement of Raman bands in parallel or in perpendicular configuration, a symmetry assignment of 34 (17Ag + 17Bg) external modes for Cu3(MoO4)2(OH)2 ceramics (42 bands are expected) was possible. Besides, five (of six possible) internal OH-stretching modes were identified in the spectral region above 3200 cm−1.
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/S0272884218308915

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