W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization
Autor(a) principal: | |
---|---|
Data de Publicação: | 2023 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ceramint.2023.05.005 http://hdl.handle.net/11449/247332 |
Resumo: | Nanostructured hollow spheres composed of K0·5Na0.5(WxNb1-x)O3 were synthesized by ultrasonic spray pyrolysis. Correlations between the W-doping content and properties of the [NbO6] octahedra, including morphology, texture, crystalline structure, and polarization were found. Scanning and transmission electron microscopy analysis indicate the present samples are nanostructured hollow spheres. Textural analysis indicates the samples are composed of a balanced framework including micropores (40–50%) and mesopores (50–60%). Structural refinement by the Rietveld method indicated that non-isovalent W6+ cation only occupies the Nb5+ site in the host structure. Several space groups including Amm2, Pbcm, and Pm were used to refine the W-doped K0·5Na0·5NbO3 structure and the best adjustment was reached assuming the co-existence of two distinct symmetries. The FTIR bands associated with a corner-shared NbO6 octahedron suggested an increase in Nb–O bond length in agreement with the Rietveld refinement. In general, ultrasonic spray pyrolysis is an effective methodology for the one-step synthesis of nanostructured crystallites of W-doped niobate-based perovskites with a tailored structure and morphology. |
id |
UNSP_ae63fcfdf39521c8c8f531e3740ae2fb |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/247332 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterizationAlkali niobate-based perovskitesStructural characterizationTungsten-dopingUltrasonic spray pyrolysisNanostructured hollow spheres composed of K0·5Na0.5(WxNb1-x)O3 were synthesized by ultrasonic spray pyrolysis. Correlations between the W-doping content and properties of the [NbO6] octahedra, including morphology, texture, crystalline structure, and polarization were found. Scanning and transmission electron microscopy analysis indicate the present samples are nanostructured hollow spheres. Textural analysis indicates the samples are composed of a balanced framework including micropores (40–50%) and mesopores (50–60%). Structural refinement by the Rietveld method indicated that non-isovalent W6+ cation only occupies the Nb5+ site in the host structure. Several space groups including Amm2, Pbcm, and Pm were used to refine the W-doped K0·5Na0·5NbO3 structure and the best adjustment was reached assuming the co-existence of two distinct symmetries. The FTIR bands associated with a corner-shared NbO6 octahedron suggested an increase in Nb–O bond length in agreement with the Rietveld refinement. In general, ultrasonic spray pyrolysis is an effective methodology for the one-step synthesis of nanostructured crystallites of W-doped niobate-based perovskites with a tailored structure and morphology.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Laboratório Nacional de NanotecnologiaDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, SPSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences, SPDepartment of Physics São Paulo State University (Unesp) São Paulo State University (Unesp) School of Technology and Sciences, SPUnidad de Desarrollo Tecnológico (UDT) Universidad de Concepción, Barrio Universitario S/nInstituto de Ciencias Químicas Aplicadas Facultad de Ingeniería Universidad Autónoma de ChileDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, SPSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences, SPDepartment of Physics São Paulo State University (Unesp) São Paulo State University (Unesp) School of Technology and Sciences, SPCAPES: 001Laboratório Nacional de Nanotecnologia: TEM-C1-20210387Laboratório Nacional de Nanotecnologia: TEM-C1-27711Universidade Estadual Paulista (UNESP)Universidad de ConcepciónUniversidad Autónoma de ChilePraxedes, Fabiano R. [UNESP]Nobre, Marcos A.L. [UNESP]Olean-Oliveira, André [UNESP]Teixeira, Marcos F.S. [UNESP]Poon, Po S.Lanfredi, Silvania [UNESP]Matos, Juan2023-07-29T13:13:10Z2023-07-29T13:13:10Z2023-07-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article24004-24017http://dx.doi.org/10.1016/j.ceramint.2023.05.005Ceramics International, v. 49, n. 14, p. 24004-24017, 2023.0272-8842http://hdl.handle.net/11449/24733210.1016/j.ceramint.2023.05.0052-s2.0-85158897549Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics Internationalinfo:eu-repo/semantics/openAccess2023-07-29T13:13:10Zoai:repositorio.unesp.br:11449/247332Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:09:41.594886Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
title |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
spellingShingle |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization Praxedes, Fabiano R. [UNESP] Alkali niobate-based perovskites Structural characterization Tungsten-doping Ultrasonic spray pyrolysis |
title_short |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
title_full |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
title_fullStr |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
title_full_unstemmed |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
title_sort |
W-doped niobate-based perovskites: Synthesis by ultrasonic spray pyrolysis and structural characterization |
author |
Praxedes, Fabiano R. [UNESP] |
author_facet |
Praxedes, Fabiano R. [UNESP] Nobre, Marcos A.L. [UNESP] Olean-Oliveira, André [UNESP] Teixeira, Marcos F.S. [UNESP] Poon, Po S. Lanfredi, Silvania [UNESP] Matos, Juan |
author_role |
author |
author2 |
Nobre, Marcos A.L. [UNESP] Olean-Oliveira, André [UNESP] Teixeira, Marcos F.S. [UNESP] Poon, Po S. Lanfredi, Silvania [UNESP] Matos, Juan |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidad de Concepción Universidad Autónoma de Chile |
dc.contributor.author.fl_str_mv |
Praxedes, Fabiano R. [UNESP] Nobre, Marcos A.L. [UNESP] Olean-Oliveira, André [UNESP] Teixeira, Marcos F.S. [UNESP] Poon, Po S. Lanfredi, Silvania [UNESP] Matos, Juan |
dc.subject.por.fl_str_mv |
Alkali niobate-based perovskites Structural characterization Tungsten-doping Ultrasonic spray pyrolysis |
topic |
Alkali niobate-based perovskites Structural characterization Tungsten-doping Ultrasonic spray pyrolysis |
description |
Nanostructured hollow spheres composed of K0·5Na0.5(WxNb1-x)O3 were synthesized by ultrasonic spray pyrolysis. Correlations between the W-doping content and properties of the [NbO6] octahedra, including morphology, texture, crystalline structure, and polarization were found. Scanning and transmission electron microscopy analysis indicate the present samples are nanostructured hollow spheres. Textural analysis indicates the samples are composed of a balanced framework including micropores (40–50%) and mesopores (50–60%). Structural refinement by the Rietveld method indicated that non-isovalent W6+ cation only occupies the Nb5+ site in the host structure. Several space groups including Amm2, Pbcm, and Pm were used to refine the W-doped K0·5Na0·5NbO3 structure and the best adjustment was reached assuming the co-existence of two distinct symmetries. The FTIR bands associated with a corner-shared NbO6 octahedron suggested an increase in Nb–O bond length in agreement with the Rietveld refinement. In general, ultrasonic spray pyrolysis is an effective methodology for the one-step synthesis of nanostructured crystallites of W-doped niobate-based perovskites with a tailored structure and morphology. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T13:13:10Z 2023-07-29T13:13:10Z 2023-07-15 |
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/10.1016/j.ceramint.2023.05.005 Ceramics International, v. 49, n. 14, p. 24004-24017, 2023. 0272-8842 http://hdl.handle.net/11449/247332 10.1016/j.ceramint.2023.05.005 2-s2.0-85158897549 |
url |
http://dx.doi.org/10.1016/j.ceramint.2023.05.005 http://hdl.handle.net/11449/247332 |
identifier_str_mv |
Ceramics International, v. 49, n. 14, p. 24004-24017, 2023. 0272-8842 10.1016/j.ceramint.2023.05.005 2-s2.0-85158897549 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
24004-24017 |
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 |
|
_version_ |
1808128763875033088 |