Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerâmica (São Paulo. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200236 |
Resumo: | Abstract The structural, morphological, and optical properties of α-SnWO4 synthesized by microwave-assisted hydrothermal method at 150 °C for different times were investigated. XRD revealed the formation of the orthorhombic phase, without the presence of a secondary phase. The sample processed for 64 min showed a reduction in unit cell volume, suggesting a decrease in the structural defects present in the sample. The Raman spectroscopy confirmed the formation of α-SnWO4, with the presence of vibrational modes attributed to the [WO6] octahedron. FE-SEM images revealed the formation of agglomerate nanosheets in all samples. The band gap (Egap) of the samples presented values in the range from 1.58 to 1.70 eV. The increase in Egap value of the sample processed for 64 min corroborated the decrease in the structural defects suggested by the Rietveld refinement. Finally, the photoluminescence was measured, with maximum emission in the blue region of the electromagnetic spectrum around 454 nm, which was attributed to the [WO6] octahedron. |
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Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal methodα-SnWO4photoluminescencesynthesisRietveld refinementAbstract The structural, morphological, and optical properties of α-SnWO4 synthesized by microwave-assisted hydrothermal method at 150 °C for different times were investigated. XRD revealed the formation of the orthorhombic phase, without the presence of a secondary phase. The sample processed for 64 min showed a reduction in unit cell volume, suggesting a decrease in the structural defects present in the sample. The Raman spectroscopy confirmed the formation of α-SnWO4, with the presence of vibrational modes attributed to the [WO6] octahedron. FE-SEM images revealed the formation of agglomerate nanosheets in all samples. The band gap (Egap) of the samples presented values in the range from 1.58 to 1.70 eV. The increase in Egap value of the sample processed for 64 min corroborated the decrease in the structural defects suggested by the Rietveld refinement. Finally, the photoluminescence was measured, with maximum emission in the blue region of the electromagnetic spectrum around 454 nm, which was attributed to the [WO6] octahedron.Associação Brasileira de Cerâmica2022-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200236Cerâmica v.68 n.386 2022reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132022683863259info:eu-repo/semantics/openAccessBarros,M. M. P.Almeida,K. C.Silva,S. A.Botelho,G.eng2022-07-05T00:00:00Zoai:scielo:S0366-69132022000200236Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2022-07-05T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
title |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
spellingShingle |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method Barros,M. M. P. α-SnWO4 photoluminescence synthesis Rietveld refinement |
title_short |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
title_full |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
title_fullStr |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
title_full_unstemmed |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
title_sort |
Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method |
author |
Barros,M. M. P. |
author_facet |
Barros,M. M. P. Almeida,K. C. Silva,S. A. Botelho,G. |
author_role |
author |
author2 |
Almeida,K. C. Silva,S. A. Botelho,G. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Barros,M. M. P. Almeida,K. C. Silva,S. A. Botelho,G. |
dc.subject.por.fl_str_mv |
α-SnWO4 photoluminescence synthesis Rietveld refinement |
topic |
α-SnWO4 photoluminescence synthesis Rietveld refinement |
description |
Abstract The structural, morphological, and optical properties of α-SnWO4 synthesized by microwave-assisted hydrothermal method at 150 °C for different times were investigated. XRD revealed the formation of the orthorhombic phase, without the presence of a secondary phase. The sample processed for 64 min showed a reduction in unit cell volume, suggesting a decrease in the structural defects present in the sample. The Raman spectroscopy confirmed the formation of α-SnWO4, with the presence of vibrational modes attributed to the [WO6] octahedron. FE-SEM images revealed the formation of agglomerate nanosheets in all samples. The band gap (Egap) of the samples presented values in the range from 1.58 to 1.70 eV. The increase in Egap value of the sample processed for 64 min corroborated the decrease in the structural defects suggested by the Rietveld refinement. Finally, the photoluminescence was measured, with maximum emission in the blue region of the electromagnetic spectrum around 454 nm, which was attributed to the [WO6] octahedron. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200236 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200236 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0366-69132022683863259 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
dc.source.none.fl_str_mv |
Cerâmica v.68 n.386 2022 reponame:Cerâmica (São Paulo. Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Cerâmica (São Paulo. Online) |
collection |
Cerâmica (São Paulo. Online) |
repository.name.fl_str_mv |
Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
ceram.abc@gmail.com||ceram.abc@gmail.com |
_version_ |
1748936785089527808 |