Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

Detalhes bibliográficos
Autor(a) principal: Neto, Roumanos Georges Dib [UNESP]
Data de Publicação: 2022
Outros Autores: Macedo, Wagner Costa [UNESP], Fernandes, José Diego [UNESP], de Souza, Agda Eunice [UNESP], Teixeira, Silvio Rainho [UNESP], Rocha, Kleper de Oliveira [UNESP], Longo, Elson
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/1517-7076-RMAT-2022-48061
http://hdl.handle.net/11449/242063
Resumo: Manganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld method). The samples obtained were heat treated at temperatures defined by means of thermal analysis (160 ºC, 480 ºC, 715 ºC, 870 ºC, 920 ºC and 1150 ºC) and analyzed by X-Ray Diffractometry (XRD), X-Ray Fluorescence (XRF), Fourier Transform Infrared (FTIR) spectroscopy, Raman scattering, UV-Vis absorption and Scanning Electron Microscopy (SEM). Structural characterizations allowed to identify five distinct phases: α-MnO2, Mn3 O4, Mn5 O8, Na2 Mn5 O10 and Na4 Mn9 O18 with weight percentages dependent on the heat treatment. The hausmannite structure (average crystallite size ranging from 28.9 nm to 99.1 nm) is present in all samples and go through various oxidation and reduction processes from 160 ºC to 1150 ºC without any major variation in the lattice parameters. Chemical characterizations identifies the presence of Na+ ions in all samples, either as substitution defects or as components of specific crystalline structures (Na2 Mn5 O10 and Na4 Mn9 O18), showing that the synthesized manganese oxides works as Na+ intercalation compounds, important materials for energy storage devices optimization. The results presented enables a better interpretation of the thermal and structural characteristics of manganese oxides synthesized via MAH.
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spelling Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinementÓxidos de manganês sintetizados pelo método hidrotermal assistido por micro-ondas: evolução de fase e refinamento de estruturaHausmanniteManganese OxidesMicrowave-Assisted Hydrothermal MethodRietveld RefinementManganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld method). The samples obtained were heat treated at temperatures defined by means of thermal analysis (160 ºC, 480 ºC, 715 ºC, 870 ºC, 920 ºC and 1150 ºC) and analyzed by X-Ray Diffractometry (XRD), X-Ray Fluorescence (XRF), Fourier Transform Infrared (FTIR) spectroscopy, Raman scattering, UV-Vis absorption and Scanning Electron Microscopy (SEM). Structural characterizations allowed to identify five distinct phases: α-MnO2, Mn3 O4, Mn5 O8, Na2 Mn5 O10 and Na4 Mn9 O18 with weight percentages dependent on the heat treatment. The hausmannite structure (average crystallite size ranging from 28.9 nm to 99.1 nm) is present in all samples and go through various oxidation and reduction processes from 160 ºC to 1150 ºC without any major variation in the lattice parameters. Chemical characterizations identifies the presence of Na+ ions in all samples, either as substitution defects or as components of specific crystalline structures (Na2 Mn5 O10 and Na4 Mn9 O18), showing that the synthesized manganese oxides works as Na+ intercalation compounds, important materials for energy storage devices optimization. The results presented enables a better interpretation of the thermal and structural characteristics of manganese oxides synthesized via MAH.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista Departamento de Física, Rua Roberto Simonsen, n. 305, SPUniversidade Estadual Paulista Departamento de Química, Avenida Engenheiro Luís Edmundo Carrijo Coube, n. 14-01, SPUniversidade Federal de São Carlos, Rod. Washington Luiz, Km 235, SPUniversidade Estadual Paulista Departamento de Física, Rua Roberto Simonsen, n. 305, SPUniversidade Estadual Paulista Departamento de Química, Avenida Engenheiro Luís Edmundo Carrijo Coube, n. 14-01, SPFAPESP: 2013/07296-2CNPq: 573636/2008-7Universidade Estadual Paulista (UNESP)Universidade Federal de São Carlos (UFSCar)Neto, Roumanos Georges Dib [UNESP]Macedo, Wagner Costa [UNESP]Fernandes, José Diego [UNESP]de Souza, Agda Eunice [UNESP]Teixeira, Silvio Rainho [UNESP]Rocha, Kleper de Oliveira [UNESP]Longo, Elson2023-03-02T08:36:47Z2023-03-02T08:36:47Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1590/1517-7076-RMAT-2022-48061Revista Materia, v. 27, n. 3, 2022.1517-7076http://hdl.handle.net/11449/24206310.1590/1517-7076-RMAT-2022-480612-s2.0-85134595426Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Materiainfo:eu-repo/semantics/openAccess2024-06-19T12:44:50Zoai:repositorio.unesp.br:11449/242063Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:08:06.476089Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
Óxidos de manganês sintetizados pelo método hidrotermal assistido por micro-ondas: evolução de fase e refinamento de estrutura
title Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
spellingShingle Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
Neto, Roumanos Georges Dib [UNESP]
Hausmannite
Manganese Oxides
Microwave-Assisted Hydrothermal Method
Rietveld Refinement
title_short Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
title_full Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
title_fullStr Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
title_full_unstemmed Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
title_sort Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
author Neto, Roumanos Georges Dib [UNESP]
author_facet Neto, Roumanos Georges Dib [UNESP]
Macedo, Wagner Costa [UNESP]
Fernandes, José Diego [UNESP]
de Souza, Agda Eunice [UNESP]
Teixeira, Silvio Rainho [UNESP]
Rocha, Kleper de Oliveira [UNESP]
Longo, Elson
author_role author
author2 Macedo, Wagner Costa [UNESP]
Fernandes, José Diego [UNESP]
de Souza, Agda Eunice [UNESP]
Teixeira, Silvio Rainho [UNESP]
Rocha, Kleper de Oliveira [UNESP]
Longo, Elson
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Universidade Federal de São Carlos (UFSCar)
dc.contributor.author.fl_str_mv Neto, Roumanos Georges Dib [UNESP]
Macedo, Wagner Costa [UNESP]
Fernandes, José Diego [UNESP]
de Souza, Agda Eunice [UNESP]
Teixeira, Silvio Rainho [UNESP]
Rocha, Kleper de Oliveira [UNESP]
Longo, Elson
dc.subject.por.fl_str_mv Hausmannite
Manganese Oxides
Microwave-Assisted Hydrothermal Method
Rietveld Refinement
topic Hausmannite
Manganese Oxides
Microwave-Assisted Hydrothermal Method
Rietveld Refinement
description Manganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld method). The samples obtained were heat treated at temperatures defined by means of thermal analysis (160 ºC, 480 ºC, 715 ºC, 870 ºC, 920 ºC and 1150 ºC) and analyzed by X-Ray Diffractometry (XRD), X-Ray Fluorescence (XRF), Fourier Transform Infrared (FTIR) spectroscopy, Raman scattering, UV-Vis absorption and Scanning Electron Microscopy (SEM). Structural characterizations allowed to identify five distinct phases: α-MnO2, Mn3 O4, Mn5 O8, Na2 Mn5 O10 and Na4 Mn9 O18 with weight percentages dependent on the heat treatment. The hausmannite structure (average crystallite size ranging from 28.9 nm to 99.1 nm) is present in all samples and go through various oxidation and reduction processes from 160 ºC to 1150 ºC without any major variation in the lattice parameters. Chemical characterizations identifies the presence of Na+ ions in all samples, either as substitution defects or as components of specific crystalline structures (Na2 Mn5 O10 and Na4 Mn9 O18), showing that the synthesized manganese oxides works as Na+ intercalation compounds, important materials for energy storage devices optimization. The results presented enables a better interpretation of the thermal and structural characteristics of manganese oxides synthesized via MAH.
publishDate 2022
dc.date.none.fl_str_mv 2022-01-01
2023-03-02T08:36:47Z
2023-03-02T08:36:47Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/1517-7076-RMAT-2022-48061
Revista Materia, v. 27, n. 3, 2022.
1517-7076
http://hdl.handle.net/11449/242063
10.1590/1517-7076-RMAT-2022-48061
2-s2.0-85134595426
url http://dx.doi.org/10.1590/1517-7076-RMAT-2022-48061
http://hdl.handle.net/11449/242063
identifier_str_mv Revista Materia, v. 27, n. 3, 2022.
1517-7076
10.1590/1517-7076-RMAT-2022-48061
2-s2.0-85134595426
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Materia
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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