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Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration

Detalhes bibliográficos
Autor(a) principal: Souza, Josiane Carneiro
Data de Publicação: 2022
Outros Autores: Martins, Tiago Almeida, de Oliveira, Regiane Cristina [UNESP], Sambrano, Julio Ricardo [UNESP], Mendonça, Cleber Renato, de Boni, Leonardo, Leite, Edson Roberto, Longo, Elson
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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spelling 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
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