Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/s1517-707620170001.0308 http://hdl.handle.net/11449/179641 |
Resumo: | The development and optimization of heterogeneous catalysts is a fundamental step to ensure the technical and economic feasibility of new materials created for a wide range of applications, including catalytic applications. The purpose of this study was therefore to synthesize and characterize clay materials from the state of Maranhão, Brazil, doped with tin and niobium oxides synthesized by the polymeric precursor method. The catalysts were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), nitrogen physisorption (BET), and energy dispersive X-ray spectroscopy (EDS). The results indicated that activating the clay mineral increased the specific surface area from 83.53 m2 g-1 to 155.2 m2 g-1, while doping with niobium reduced the specific surface area to 14.68 m2 g-1. The chemical composition of the material treated with nitric acid was found to limit the concentrations of some metals and increase the silica content. The XRD and IR analyses revealed the presence of niobium and tin in the clay matrix. Lastly, the method of synthesis adopted here proved to be efficient for the preparation of the supported catalyst (SnO2.Nb/clay). |
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Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhenseSynthesis and characterization of SnO2.Nb catalysts supported on maranhão clayMaranhense clayNbPolymeric precursor methodSnO2Supported catalystsThe development and optimization of heterogeneous catalysts is a fundamental step to ensure the technical and economic feasibility of new materials created for a wide range of applications, including catalytic applications. The purpose of this study was therefore to synthesize and characterize clay materials from the state of Maranhão, Brazil, doped with tin and niobium oxides synthesized by the polymeric precursor method. The catalysts were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), nitrogen physisorption (BET), and energy dispersive X-ray spectroscopy (EDS). The results indicated that activating the clay mineral increased the specific surface area from 83.53 m2 g-1 to 155.2 m2 g-1, while doping with niobium reduced the specific surface area to 14.68 m2 g-1. The chemical composition of the material treated with nitric acid was found to limit the concentrations of some metals and increase the silica content. The XRD and IR analyses revealed the presence of niobium and tin in the clay matrix. Lastly, the method of synthesis adopted here proved to be efficient for the preparation of the supported catalyst (SnO2.Nb/clay).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do MaranhãoUniversidade Federal do ParanáPPGEQ UFPR, R. Coronel Francisco H. dos Santos 100IFMA, Av. Getúlio Vargas 04PPGEM, Av. Getúlio Vargas 04PPGQ, Av. Getúlio Vargas 04CMDMC LIEC Instituto de Química UNESP, C.P. 355CMDMC LIEC Instituto de Química UNESP, C.P. 355Universidade Federal do Paraná (UFPR)IFMAPPGEMPPGQUniversidade Estadual Paulista (Unesp)Gonçalves, Cíntia LeiteCorazza, Marcos LucioOliveira, Marcelo MoizinhoRangel, José Hilton GomesVasconcelos, Jomar SalesDe Figueredo, Gilvan PereiraLongo, Elson [UNESP]2018-12-11T17:36:09Z2018-12-11T17:36:09Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1590/s1517-707620170001.0308Revista Materia, v. 23, n. 1, 2018.1517-7076http://hdl.handle.net/11449/17964110.1590/s1517-707620170001.03082-s2.0-850433088842-s2.0-85043308884.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Materia0,188info:eu-repo/semantics/openAccess2024-01-09T06:26:24Zoai:repositorio.unesp.br:11449/179641Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:30:20.041552Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense Synthesis and characterization of SnO2.Nb catalysts supported on maranhão clay |
title |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
spellingShingle |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense Gonçalves, Cíntia Leite Maranhense clay Nb Polymeric precursor method SnO2 Supported catalysts |
title_short |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
title_full |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
title_fullStr |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
title_full_unstemmed |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
title_sort |
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense |
author |
Gonçalves, Cíntia Leite |
author_facet |
Gonçalves, Cíntia Leite Corazza, Marcos Lucio Oliveira, Marcelo Moizinho Rangel, José Hilton Gomes Vasconcelos, Jomar Sales De Figueredo, Gilvan Pereira Longo, Elson [UNESP] |
author_role |
author |
author2 |
Corazza, Marcos Lucio Oliveira, Marcelo Moizinho Rangel, José Hilton Gomes Vasconcelos, Jomar Sales De Figueredo, Gilvan Pereira Longo, Elson [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Paraná (UFPR) IFMA PPGEM PPGQ Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Gonçalves, Cíntia Leite Corazza, Marcos Lucio Oliveira, Marcelo Moizinho Rangel, José Hilton Gomes Vasconcelos, Jomar Sales De Figueredo, Gilvan Pereira Longo, Elson [UNESP] |
dc.subject.por.fl_str_mv |
Maranhense clay Nb Polymeric precursor method SnO2 Supported catalysts |
topic |
Maranhense clay Nb Polymeric precursor method SnO2 Supported catalysts |
description |
The development and optimization of heterogeneous catalysts is a fundamental step to ensure the technical and economic feasibility of new materials created for a wide range of applications, including catalytic applications. The purpose of this study was therefore to synthesize and characterize clay materials from the state of Maranhão, Brazil, doped with tin and niobium oxides synthesized by the polymeric precursor method. The catalysts were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), nitrogen physisorption (BET), and energy dispersive X-ray spectroscopy (EDS). The results indicated that activating the clay mineral increased the specific surface area from 83.53 m2 g-1 to 155.2 m2 g-1, while doping with niobium reduced the specific surface area to 14.68 m2 g-1. The chemical composition of the material treated with nitric acid was found to limit the concentrations of some metals and increase the silica content. The XRD and IR analyses revealed the presence of niobium and tin in the clay matrix. Lastly, the method of synthesis adopted here proved to be efficient for the preparation of the supported catalyst (SnO2.Nb/clay). |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:36:09Z 2018-12-11T17:36:09Z 2018-01-01 |
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/s1517-707620170001.0308 Revista Materia, v. 23, n. 1, 2018. 1517-7076 http://hdl.handle.net/11449/179641 10.1590/s1517-707620170001.0308 2-s2.0-85043308884 2-s2.0-85043308884.pdf |
url |
http://dx.doi.org/10.1590/s1517-707620170001.0308 http://hdl.handle.net/11449/179641 |
identifier_str_mv |
Revista Materia, v. 23, n. 1, 2018. 1517-7076 10.1590/s1517-707620170001.0308 2-s2.0-85043308884 2-s2.0-85043308884.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Materia 0,188 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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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1808129432981864448 |