Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.26850/1678-4618EQJ.V47.1SI.2022.P105-119 http://hdl.handle.net/11449/241846 |
Resumo: | The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to treat this pollutant. Here, Fe2O3 obtained by the conventional hydrothermal process and heat-treatment, subsequently femtosecond laser-irradiated treatment. Materials obtained with a mixture of irradiated α-Fe2O3 and ε-Fe2O3 phases revealed lower crystallinity than irradiated α-Fe2O3 samples. The irradiation treatment and the increase in crystallinity were crucial to improve the performance of α-Fe2O3 irradiated sample in the discoloration of MB, which reached 90% in 75 min of dye solution exposure under UV irradiation. The irradiation treatment proved to allow greater exposure of the particle surfaces, which coalesced and presented a greater distribution of medium size, indicating a more heterogeneous morphology in the irradiated samples. As a result, there was an increase in active sites due to the density of defects generated, which facilitated the dye degradation process. |
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Repositório Institucional da UNESP |
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Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discolorationdefect densitydyepollutantpolymorphismThe disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to treat this pollutant. Here, Fe2O3 obtained by the conventional hydrothermal process and heat-treatment, subsequently femtosecond laser-irradiated treatment. Materials obtained with a mixture of irradiated α-Fe2O3 and ε-Fe2O3 phases revealed lower crystallinity than irradiated α-Fe2O3 samples. The irradiation treatment and the increase in crystallinity were crucial to improve the performance of α-Fe2O3 irradiated sample in the discoloration of MB, which reached 90% in 75 min of dye solution exposure under UV irradiation. The irradiation treatment proved to allow greater exposure of the particle surfaces, which coalesced and presented a greater distribution of medium size, indicating a more heterogeneous morphology in the irradiated samples. As a result, there was an increase in active sites due to the density of defects generated, which facilitated the dye degradation process.Federal University of São Carlos Center for the Development of Functional MaterialsSão Paulo State University Faculty of ScienceUniversity of São Paulo Institute of PhysicsSão Paulo State University Faculty of ScienceUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Souza, Josiane CarneiroMartins, Tiago Almeidade Oliveira, Regiane Cristina [UNESP]Sambrano, Julio Ricardo [UNESP]Mendonça, Cleber Renatode Boni, LeonardoLeite, Edson RobertoLongo, Elson2023-03-02T00:30:32Z2023-03-02T00:30:32Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article105-119http://dx.doi.org/10.26850/1678-4618EQJ.V47.1SI.2022.P105-119Ecletica Quimica, v. 47, p. 105-119.1678-46180100-4670http://hdl.handle.net/11449/24184610.26850/1678-4618EQJ.V47.1SI.2022.P105-1192-s2.0-85130161027Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcletica Quimicainfo:eu-repo/semantics/openAccess2024-04-29T14:59:42Zoai:repositorio.unesp.br:11449/241846Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:42:20.235215Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
title |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
spellingShingle |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration Souza, Josiane Carneiro defect density dye pollutant polymorphism |
title_short |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
title_full |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
title_fullStr |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
title_full_unstemmed |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
title_sort |
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
author |
Souza, Josiane Carneiro |
author_facet |
Souza, Josiane Carneiro Martins, Tiago Almeida de Oliveira, Regiane Cristina [UNESP] Sambrano, Julio Ricardo [UNESP] Mendonça, Cleber Renato de Boni, Leonardo Leite, Edson Roberto Longo, Elson |
author_role |
author |
author2 |
Martins, Tiago Almeida de Oliveira, Regiane Cristina [UNESP] Sambrano, Julio Ricardo [UNESP] Mendonça, Cleber Renato de Boni, Leonardo Leite, Edson Roberto Longo, Elson |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (UNESP) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Souza, Josiane Carneiro Martins, Tiago Almeida de Oliveira, Regiane Cristina [UNESP] Sambrano, Julio Ricardo [UNESP] Mendonça, Cleber Renato de Boni, Leonardo Leite, Edson Roberto Longo, Elson |
dc.subject.por.fl_str_mv |
defect density dye pollutant polymorphism |
topic |
defect density dye pollutant polymorphism |
description |
The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to treat this pollutant. Here, Fe2O3 obtained by the conventional hydrothermal process and heat-treatment, subsequently femtosecond laser-irradiated treatment. Materials obtained with a mixture of irradiated α-Fe2O3 and ε-Fe2O3 phases revealed lower crystallinity than irradiated α-Fe2O3 samples. The irradiation treatment and the increase in crystallinity were crucial to improve the performance of α-Fe2O3 irradiated sample in the discoloration of MB, which reached 90% in 75 min of dye solution exposure under UV irradiation. The irradiation treatment proved to allow greater exposure of the particle surfaces, which coalesced and presented a greater distribution of medium size, indicating a more heterogeneous morphology in the irradiated samples. As a result, there was an increase in active sites due to the density of defects generated, which facilitated the dye degradation process. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 2023-03-02T00:30:32Z 2023-03-02T00:30:32Z |
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/10.26850/1678-4618EQJ.V47.1SI.2022.P105-119 Ecletica Quimica, v. 47, p. 105-119. 1678-4618 0100-4670 http://hdl.handle.net/11449/241846 10.26850/1678-4618EQJ.V47.1SI.2022.P105-119 2-s2.0-85130161027 |
url |
http://dx.doi.org/10.26850/1678-4618EQJ.V47.1SI.2022.P105-119 http://hdl.handle.net/11449/241846 |
identifier_str_mv |
Ecletica Quimica, v. 47, p. 105-119. 1678-4618 0100-4670 10.26850/1678-4618EQJ.V47.1SI.2022.P105-119 2-s2.0-85130161027 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ecletica Quimica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
105-119 |
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_ |
1808128847538814976 |