Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A
dc.contributor.author | Valentini, Giuliana | pt_BR |
dc.contributor.author | Caon, Natália Bruzamarello | pt_BR |
dc.contributor.author | Faita, Fabrício Luiz | pt_BR |
dc.contributor.author | Parize, Alexandre Luís | pt_BR |
dc.date.accessioned | 2023-05-10T03:28:14Z | pt_BR |
dc.date.issued | 2023 | pt_BR |
dc.identifier.issn | 0103-5053 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/257918 | pt_BR |
dc.description.abstract | 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. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Journal of the Brazilian Chemical Society. São Paulo. Vol. 34, n. 2 (Feb. 2023), p. 167-181 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Adsorption | en |
dc.subject | Nanopartículas magnéticas | pt_BR |
dc.subject | Core-shell | en |
dc.subject | Adsorção | pt_BR |
dc.subject | Ferritas | pt_BR |
dc.subject | Nanoparticle | en |
dc.subject | Bisfenol-a | pt_BR |
dc.subject | Polymer | en |
dc.subject | Polimerização | pt_BR |
dc.title | Adsorption properties of magnetic CoFe2O4@SiO2 decorated with P4VP applied to bisphenol A | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001165757 | pt_BR |
dc.type.origin | Nacional | pt_BR |
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