Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/257918 |
Resumo: | In this study, the preparation and adsorption properties of cobalt ferrite core-shell nanoparticles coated with silica and decorated with poly(4-vinylpyridine) (CoFe2O4@SiO2-P4VP) applied to bisphenol A (BPA) adsorption were described. The CoFe2O4-based core was coated by a nanometric layer of silica under Stöber conditions and followed by coating with poly(4-vinylpyridine) via surface polymerization in miniemulsion. The characterizations involved transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Fourier transform infrared (FTIR), thermogravimetry (TGA), dynamic light scattering (DLS) and zeta potential. The polymeric core-shell nanoparticle showed a spherical structure with a magnetic core of ca. 11 nm and a layer of silica of ca. 4 nm. The amount of poly(4-vinylpyridine) that decorated the nanoparticle surface was verified by thermogravimetric analysis. CoFe2O4@SiO2-P4VP exhibited the capacity to adsorb bisphenol A. The chemometric model indicated a significant effect between the ionic strength and pH of the solution in the adsorption of bisphenol A. CoFe2O4@SiO2-P4VP presented a superior adsorption capacity towards BPA (46.6 mg g−1) in optimized conditions. The adsorption kinetics of BPA by CoFe2O4@SiO2-P4VP involved a pseudo-second order process. Also, the adsorption isotherm indicated a multilayer process with data well-adjusted by Freundlich equation. The nanomaterial CoFe2O4@SiO2-P4VP can be reused in adsorption of BPA for up to eight cycles. |
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Valentini, GiulianaCaon, Natália BruzamarelloFaita, Fabrício LuizParize, Alexandre Luís2023-05-10T03:28:14Z20230103-5053http://hdl.handle.net/10183/257918001165757In this study, the preparation and adsorption properties of cobalt ferrite core-shell nanoparticles coated with silica and decorated with poly(4-vinylpyridine) (CoFe2O4@SiO2-P4VP) applied to bisphenol A (BPA) adsorption were described. The CoFe2O4-based core was coated by a nanometric layer of silica under Stöber conditions and followed by coating with poly(4-vinylpyridine) via surface polymerization in miniemulsion. The characterizations involved transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Fourier transform infrared (FTIR), thermogravimetry (TGA), dynamic light scattering (DLS) and zeta potential. The polymeric core-shell nanoparticle showed a spherical structure with a magnetic core of ca. 11 nm and a layer of silica of ca. 4 nm. The amount of poly(4-vinylpyridine) that decorated the nanoparticle surface was verified by thermogravimetric analysis. CoFe2O4@SiO2-P4VP exhibited the capacity to adsorb bisphenol A. The chemometric model indicated a significant effect between the ionic strength and pH of the solution in the adsorption of bisphenol A. CoFe2O4@SiO2-P4VP presented a superior adsorption capacity towards BPA (46.6 mg g−1) in optimized conditions. The adsorption kinetics of BPA by CoFe2O4@SiO2-P4VP involved a pseudo-second order process. Also, the adsorption isotherm indicated a multilayer process with data well-adjusted by Freundlich equation. The nanomaterial CoFe2O4@SiO2-P4VP can be reused in adsorption of BPA for up to eight cycles.application/pdfengJournal of the Brazilian Chemical Society. São Paulo. Vol. 34, n. 2 (Feb. 2023), p. 167-181Nanopartículas magnéticasAdsorçãoFerritasBisfenol-aPolimerizaçãoAdsorptionCore-shellNanoparticlePolymerAdsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol Ainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001165757.pdf.txt001165757.pdf.txtExtracted Texttext/plain59334http://www.lume.ufrgs.br/bitstream/10183/257918/2/001165757.pdf.txt3776e11e8666993b18ec4ab26b317af7MD52ORIGINAL001165757.pdfTexto completo (inglês)application/pdf6940502http://www.lume.ufrgs.br/bitstream/10183/257918/1/001165757.pdf8a50eeb739dd6f09434902d6b5b15cc6MD5110183/2579182023-05-21 03:28:32.017644oai:www.lume.ufrgs.br:10183/257918Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-21T06:28:32Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
title |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
spellingShingle |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A Valentini, Giuliana Nanopartículas magnéticas Adsorção Ferritas Bisfenol-a Polimerização Adsorption Core-shell Nanoparticle Polymer |
title_short |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
title_full |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
title_fullStr |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
title_full_unstemmed |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
title_sort |
Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A |
author |
Valentini, Giuliana |
author_facet |
Valentini, Giuliana Caon, Natália Bruzamarello Faita, Fabrício Luiz Parize, Alexandre Luís |
author_role |
author |
author2 |
Caon, Natália Bruzamarello Faita, Fabrício Luiz Parize, Alexandre Luís |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Valentini, Giuliana Caon, Natália Bruzamarello Faita, Fabrício Luiz Parize, Alexandre Luís |
dc.subject.por.fl_str_mv |
Nanopartículas magnéticas Adsorção Ferritas Bisfenol-a Polimerização |
topic |
Nanopartículas magnéticas Adsorção Ferritas Bisfenol-a Polimerização Adsorption Core-shell Nanoparticle Polymer |
dc.subject.eng.fl_str_mv |
Adsorption Core-shell Nanoparticle Polymer |
description |
In this study, the preparation and adsorption properties of cobalt ferrite core-shell nanoparticles coated with silica and decorated with poly(4-vinylpyridine) (CoFe2O4@SiO2-P4VP) applied to bisphenol A (BPA) adsorption were described. The CoFe2O4-based core was coated by a nanometric layer of silica under Stöber conditions and followed by coating with poly(4-vinylpyridine) via surface polymerization in miniemulsion. The characterizations involved transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Fourier transform infrared (FTIR), thermogravimetry (TGA), dynamic light scattering (DLS) and zeta potential. The polymeric core-shell nanoparticle showed a spherical structure with a magnetic core of ca. 11 nm and a layer of silica of ca. 4 nm. The amount of poly(4-vinylpyridine) that decorated the nanoparticle surface was verified by thermogravimetric analysis. CoFe2O4@SiO2-P4VP exhibited the capacity to adsorb bisphenol A. The chemometric model indicated a significant effect between the ionic strength and pH of the solution in the adsorption of bisphenol A. CoFe2O4@SiO2-P4VP presented a superior adsorption capacity towards BPA (46.6 mg g−1) in optimized conditions. The adsorption kinetics of BPA by CoFe2O4@SiO2-P4VP involved a pseudo-second order process. Also, the adsorption isotherm indicated a multilayer process with data well-adjusted by Freundlich equation. The nanomaterial CoFe2O4@SiO2-P4VP can be reused in adsorption of BPA for up to eight cycles. |
publishDate |
2023 |
dc.date.accessioned.fl_str_mv |
2023-05-10T03:28:14Z |
dc.date.issued.fl_str_mv |
2023 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/257918 |
dc.identifier.issn.pt_BR.fl_str_mv |
0103-5053 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001165757 |
identifier_str_mv |
0103-5053 001165757 |
url |
http://hdl.handle.net/10183/257918 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of the Brazilian Chemical Society. São Paulo. Vol. 34, n. 2 (Feb. 2023), p. 167-181 |
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 |
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UFRGS |
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Repositório Institucional da UFRGS |
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Repositório Institucional da UFRGS |
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