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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/61578
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dc.creatorGuilherme Mendes Martinspt_BR
dc.creatorRoberto Luiz Moreirapt_BR
dc.creatorAnderson Diaspt_BR
dc.date.accessioned2023-11-30T18:26:38Z-
dc.date.available2023-11-30T18:26:38Z-
dc.date.issued2020-
dc.citation.volume22pt_BR
dc.citation.spage1939pt_BR
dc.citation.epage1955pt_BR
dc.identifier.doihttps://doi.org/10.1039/C9CE01554Jpt_BR
dc.identifier.issn1466-8033pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/61578-
dc.description.resumoA soft chemistry approach was applied to synthesize de(sodiated) transition-metal hydroxy molybdates under hydrothermal conditions. Different NaM2(H3O2)(MoO4)2 and M2MoO4(OH)2 compositions (M = Ni, Zn) were prepared at mild temperatures (110–250 °C) for times ranging from 10 min to 24 h. Sodiated compounds were obtained after a microwave-assisted hydrothermal process at 150 °C (10–120 min) for zinc-based materials. Besides, conventional heating destabilized the sodiated NaZn2(H3O2)(MoO4)2 phase at 110 °C, thus increasing the amount of Zn2MoO4(OH)2 at temperatures up to 250 °C. NaNi2(H3O2)(MoO4)2 phases were noted only for 10 min under microwave irradiation, while longer times promoted a chemical reaction towards a new desodiated phase. This novel Ni2MoO4(OH)2 phase was also obtained by conventional hydrothermal processing (110–250 °C, 24 h). Slow precipitation rates yielded a hydrated nickel molybdate (triclinic, P[1 with combining macron]) after coprecipitation followed or not by microwave irradiation. Raman spectroscopy analysis results showed a good agreement with experimental results and group-theory calculations for both sodiated and desodiated materials. A temperature-induced polymorphic transformation was observed from NiMoO4·xH2O (triclinic, P[1 with combining macron]) to α-NiMoO4 (monoclinic, C2/m). For all the obtained polymorphs, the relevant Raman modes were depicted, allowing us to determine their spectroscopic fingerprints. The results constitute an important basis on the understanding of the synthesis of (de)sodiated transition-metal hydroxy molybdates under hydrothermal conditions.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipFINEP - Financiadora de Estudos e Projetos, Financiadora de Estudos e Projetospt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofCrystEngCommpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectTransition-metalpt_BR
dc.subjectHydroxy molybdatespt_BR
dc.subjectHydrothermal conditionspt_BR
dc.subjectMicrowave-assistedpt_BR
dc.subjectRaman spectroscopypt_BR
dc.subjectPolymorphic transformationpt_BR
dc.subject.otherLigas de metais de transiçãopt_BR
dc.subject.otherCompostos de molibdêniopt_BR
dc.subject.otherMicroondaspt_BR
dc.subject.otherRaman, Espectroscopia dept_BR
dc.subject.otherPolimorfismo (Cristalografia)pt_BR
dc.titleA soft chemistry approach to preparing (de)sodiated transition-metal hydroxy molybdatespt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://pubs.rsc.org/en/content/articlelanding/2020/ce/c9ce01554j#!pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7620-6708pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6820-0269pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7413-1087pt_BR
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