Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching

Detalhes bibliográficos
Autor(a) principal: Bertuzzo, Vinícius Lima [UNESP]
Data de Publicação: 2023
Outros Autores: Neto, Alberto Vieira de Carvalho [UNESP], Dos Santos, Dayse Iara [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/1517-7076-RMAT-2022-0180
http://hdl.handle.net/11449/246893
Resumo: Composites formed from semiconductor oxides have been synthesized and assessed for their properties and applications, as well as a photocatalyst for restoring aquifers through the degradation or bleaching of organic dyes. The Fe2 O3-SnO2 nanocomposite was prepared by the Polyol method, a technique not found for this composite so far in the literature, under reflux in ethylene glycol. The composite and the isolated oxides were synthesized by the same process, characterized, and evaluated as photocatalysts of Rhodamine-B in aqueous solution (10 mg.L⁻1). The materials collected after the reflux performed at time intervals of 1 h and 8 h generated Fe2 O3 and SnO2, respectively, were analyzed by TGA/DTA and by XRD. It was found that α-Fe2 O3 was obtained at 400 °C and SnO2 at 650 °C. This composite was treated at 700 °C for 1 h. The SEM proved the formation of a nanostructured composite with SnO2 nanoparticles. The BET curves indicated non-porous materials with surface areas of 18, 45 and 20 m2.g⁻1 for the samples prepared from Fe2 O3, SnO2 and the composite, respecti-vely. The band gaps estimated at 1.9 eV, 3.5 eV and 1.8 eV, in the same sequence as above. The bleaching tests of Rhodamine-B, pH 5.5 in exposure to visible and ultraviolet light, showed completely different properties. The Fe2 O3 particles showed physical adsorption capable of reducing light absorption by 75% in the initial 15 minutes, however, there was no bleaching over the next 75 minutes. The presence of SnO2 in the solution showed a maximum bleaching of 45% after 120 minutes. The discoloration obtained by the nanocomposite in 180 minutes was 20%, a result attributed to the total covering of the surface of the α-Fe2 O3 particles by the SnO2 nanoparticles, preventing both the physical adsorption of the dye onto the iron oxide and the progress of the absorption mechanism. light followed by dye degradation.
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spelling Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleachingSíntese Conjunta do compósito nanoestruturado Fe2 O3-SnO2 pelo método poliol e seu desempenho fotocatalítico no descoramento da rodamina-BNanocompositesPhotocatalysisPolyolComposites formed from semiconductor oxides have been synthesized and assessed for their properties and applications, as well as a photocatalyst for restoring aquifers through the degradation or bleaching of organic dyes. The Fe2 O3-SnO2 nanocomposite was prepared by the Polyol method, a technique not found for this composite so far in the literature, under reflux in ethylene glycol. The composite and the isolated oxides were synthesized by the same process, characterized, and evaluated as photocatalysts of Rhodamine-B in aqueous solution (10 mg.L⁻1). The materials collected after the reflux performed at time intervals of 1 h and 8 h generated Fe2 O3 and SnO2, respectively, were analyzed by TGA/DTA and by XRD. It was found that α-Fe2 O3 was obtained at 400 °C and SnO2 at 650 °C. This composite was treated at 700 °C for 1 h. The SEM proved the formation of a nanostructured composite with SnO2 nanoparticles. The BET curves indicated non-porous materials with surface areas of 18, 45 and 20 m2.g⁻1 for the samples prepared from Fe2 O3, SnO2 and the composite, respecti-vely. The band gaps estimated at 1.9 eV, 3.5 eV and 1.8 eV, in the same sequence as above. The bleaching tests of Rhodamine-B, pH 5.5 in exposure to visible and ultraviolet light, showed completely different properties. The Fe2 O3 particles showed physical adsorption capable of reducing light absorption by 75% in the initial 15 minutes, however, there was no bleaching over the next 75 minutes. The presence of SnO2 in the solution showed a maximum bleaching of 45% after 120 minutes. The discoloration obtained by the nanocomposite in 180 minutes was 20%, a result attributed to the total covering of the surface of the α-Fe2 O3 particles by the SnO2 nanoparticles, preventing both the physical adsorption of the dye onto the iron oxide and the progress of the absorption mechanism. light followed by dye degradation.Universidade Estadual Paulista Faculdade de Ciências Programa de Pós-graduação em Ciências e Tecnologia de Materiais, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, Vargem Limpa,, São PauloUniversidade Estadual Paulista Faculdade de Ciências Programa de Pós-graduação em Ciências e Tecnologia de Materiais, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, Vargem Limpa,, São PauloUniversidade Estadual Paulista (UNESP)Bertuzzo, Vinícius Lima [UNESP]Neto, Alberto Vieira de Carvalho [UNESP]Dos Santos, Dayse Iara [UNESP]2023-07-29T12:53:24Z2023-07-29T12:53:24Z2023-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1590/1517-7076-RMAT-2022-0180Revista Materia, v. 28, n. 1, 2023.1517-7076http://hdl.handle.net/11449/24689310.1590/1517-7076-RMAT-2022-01802-s2.0-85148901429Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Materiainfo:eu-repo/semantics/openAccess2023-07-29T12:53:24Zoai:repositorio.unesp.br:11449/246893Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:40:46.552126Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
Síntese Conjunta do compósito nanoestruturado Fe2 O3-SnO2 pelo método poliol e seu desempenho fotocatalítico no descoramento da rodamina-B
title Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
spellingShingle Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
Bertuzzo, Vinícius Lima [UNESP]
Nanocomposites
Photocatalysis
Polyol
title_short Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
title_full Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
title_fullStr Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
title_full_unstemmed Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
title_sort Joint synthesis of Fe2 O3-SnO2 nanostructured composite by the polyol method and its photocatalytic performance in rhodamine-B bleaching
author Bertuzzo, Vinícius Lima [UNESP]
author_facet Bertuzzo, Vinícius Lima [UNESP]
Neto, Alberto Vieira de Carvalho [UNESP]
Dos Santos, Dayse Iara [UNESP]
author_role author
author2 Neto, Alberto Vieira de Carvalho [UNESP]
Dos Santos, Dayse Iara [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Bertuzzo, Vinícius Lima [UNESP]
Neto, Alberto Vieira de Carvalho [UNESP]
Dos Santos, Dayse Iara [UNESP]
dc.subject.por.fl_str_mv Nanocomposites
Photocatalysis
Polyol
topic Nanocomposites
Photocatalysis
Polyol
description Composites formed from semiconductor oxides have been synthesized and assessed for their properties and applications, as well as a photocatalyst for restoring aquifers through the degradation or bleaching of organic dyes. The Fe2 O3-SnO2 nanocomposite was prepared by the Polyol method, a technique not found for this composite so far in the literature, under reflux in ethylene glycol. The composite and the isolated oxides were synthesized by the same process, characterized, and evaluated as photocatalysts of Rhodamine-B in aqueous solution (10 mg.L⁻1). The materials collected after the reflux performed at time intervals of 1 h and 8 h generated Fe2 O3 and SnO2, respectively, were analyzed by TGA/DTA and by XRD. It was found that α-Fe2 O3 was obtained at 400 °C and SnO2 at 650 °C. This composite was treated at 700 °C for 1 h. The SEM proved the formation of a nanostructured composite with SnO2 nanoparticles. The BET curves indicated non-porous materials with surface areas of 18, 45 and 20 m2.g⁻1 for the samples prepared from Fe2 O3, SnO2 and the composite, respecti-vely. The band gaps estimated at 1.9 eV, 3.5 eV and 1.8 eV, in the same sequence as above. The bleaching tests of Rhodamine-B, pH 5.5 in exposure to visible and ultraviolet light, showed completely different properties. The Fe2 O3 particles showed physical adsorption capable of reducing light absorption by 75% in the initial 15 minutes, however, there was no bleaching over the next 75 minutes. The presence of SnO2 in the solution showed a maximum bleaching of 45% after 120 minutes. The discoloration obtained by the nanocomposite in 180 minutes was 20%, a result attributed to the total covering of the surface of the α-Fe2 O3 particles by the SnO2 nanoparticles, preventing both the physical adsorption of the dye onto the iron oxide and the progress of the absorption mechanism. light followed by dye degradation.
publishDate 2023
dc.date.none.fl_str_mv 2023-07-29T12:53:24Z
2023-07-29T12:53:24Z
2023-01-01
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-2022-0180
Revista Materia, v. 28, n. 1, 2023.
1517-7076
http://hdl.handle.net/11449/246893
10.1590/1517-7076-RMAT-2022-0180
2-s2.0-85148901429
url http://dx.doi.org/10.1590/1517-7076-RMAT-2022-0180
http://hdl.handle.net/11449/246893
identifier_str_mv Revista Materia, v. 28, n. 1, 2023.
1517-7076
10.1590/1517-7076-RMAT-2022-0180
2-s2.0-85148901429
dc.language.iso.fl_str_mv por
language por
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)
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