<i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant

Single-crystal 15 nm size magnetite nanoparticles were synthesized and coated with Yerba Mate (Ilex paraguariensis) extract to evaluate their use as versatile antioxidant magnetic nanoadsorbents. The obtained particles, Mnp@YM, were found to be composed of a crystalline magnetite core surrounded by...

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Autores principales: Mercado Castro, Donaldo Fabio, Caregnato, Paula, Villata, Laura Sofía, González, Mónica Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Química
Radical scavenger
Sulfate radicals
ABTS+•
Nanoadsorbent
Methylene blue
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/133110
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-133110
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Radical scavenger
Sulfate radicals
ABTS+•
Nanoadsorbent
Methylene blue
spellingShingle Química
Radical scavenger
Sulfate radicals
ABTS+•
Nanoadsorbent
Methylene blue
Mercado Castro, Donaldo Fabio
Caregnato, Paula
Villata, Laura Sofía
González, Mónica Cristina
<i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
topic_facet Química
Radical scavenger
Sulfate radicals
ABTS+•
Nanoadsorbent
Methylene blue
description Single-crystal 15 nm size magnetite nanoparticles were synthesized and coated with Yerba Mate (Ilex paraguariensis) extract to evaluate their use as versatile antioxidant magnetic nanoadsorbents. The obtained particles, Mnp@YM, were found to be composed of a crystalline magnetite core surrounded by a shell composed of Fe3O4, FeO, and Fe2O3 oxides. YM extract resulted an effective protective coating for Mnp incorporating surface carboxylates, phenols, and organic N groups which improve the particles stability in aqueous suspensions. Mnp@YM antioxidant capacity (1.8 µM Trolox equivalent per 0.1 mg YM coating contained in 1 mgL−1 particle suspension) is of the order reported for polyphenols. SO4 ⋅− scavenging rate constant (1.5×104 g−1 L s−1 ) is within the diffusion controlled regime for 15 nm spherical nanoparticles with homogeneously distributed reactive sites. Mnp@YM reversibly adsorbs MB with maximum adsorption of 50 mg g−1 . As a consequence of these capacities, Mnp@YM resulted effective in preventing MB oxidation by peroxodisulfate.
format Articulo
Articulo
author Mercado Castro, Donaldo Fabio
Caregnato, Paula
Villata, Laura Sofía
González, Mónica Cristina
author_facet Mercado Castro, Donaldo Fabio
Caregnato, Paula
Villata, Laura Sofía
González, Mónica Cristina
author_sort Mercado Castro, Donaldo Fabio
title <i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
title_short <i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
title_full <i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
title_fullStr <i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
title_full_unstemmed <i>Ilex paraguariensis</i> Extract-Coated Magnetite Nanoparticles: A Sustainable Nano-adsorbent and Antioxidant
title_sort <i>ilex paraguariensis</i> extract-coated magnetite nanoparticles: a sustainable nano-adsorbent and antioxidant
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/133110
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AT villatalaurasofia iilexparaguariensisiextractcoatedmagnetitenanoparticlesasustainablenanoadsorbentandantioxidant
AT gonzalezmonicacristina iilexparaguariensisiextractcoatedmagnetitenanoparticlesasustainablenanoadsorbentandantioxidant
bdutipo_str Repositorios
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