Título

As(V) removal capacity of FeCu bimetallic nanoparticles in aqueous solutions: the influence of Cu content and morphologic changes in bimetallic nanoparticles

Autor

Pamela Sepúlveda

María Angélica Rubio

Samuel Baltazar

Javier Rojas-Nunez

JOSE LUIS SANCHEZ LLAMAZARES

Alejandra García García

Nicolás Arancibia-Miranda

Nivel de Acceso

En Embargo

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Identificador alterno

doi: https://doi.org/10.1016/j.jcis.2018.03.113

Materias

Bimetallic nanoparticles - (AUTOR) Morphology - (AUTOR) Molecular dynamics - (AUTOR) Sorption - (AUTOR) Arsenic - (AUTOR) BIOLOGÍA Y QUÍMICA - (CTI) QUÍMICA - (CTI) QUÍMICA - (CTI)

Resumen o descripción

"In this study, bimetallic nanoparticles (BMNPs) with different mass ratios of Cu and Fe were evaluated. The influence of the morphology on the removal of pollutants was explored through theoretical and experimental studies, which revealed the best structure for removing arsenate (As(V)) in aqueous systems. To evidence the surface characteristics and differences among BMNPs with different mass proportions of Fe and Cu, several characterization techniques were used. Microscopy techniques and molecular dynamics simulations were applied to determine the differences in morphology and structure. In addition, X-ray diffraction (XRD) was used to determine the presence of various oxides. Finally, the magnetization response was evaluated, revealing differences among the materials. Our cumulative data show that BMNPs with low amounts of Cu (Fe0.9Cu0.1) had a non-uniform core-shell structure with agglomerate-type chains of magnetite, whereas a Janus-like structure was observed in BMNPs with high amounts of Cu (Fe0.5Cu0.5). However, a non-uniform core-shell structure (Fe0.9Cu0.1) facilitated electron transfer among Fe, Cu and As, which increased the adsorption rate (k), capacity (qe) and intensity (n). The mechanism of As removal was also explored in a comparative study of the phase and morphology of BMNPs pre- and post-sorption."

Editor

Elsevier

Fecha de publicación

2018

Tipo de publicación

Artículo

Versión de la publicación

Versión aceptada

Recurso de información

http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/2004

Formato

application/pdf

Sugerencia de citación

Pamela Sepúlveda, María A. Rubio, Samuel E. Baltazar, J. Rojas-Nunez, J.L. Sánchez Llamazares, Alejandra García Garcia, Nicolás Arancibia-Miranda, As(V) removal capacity of FeCu bimetallic nanoparticles in aqueous solutions: The influence of Cu content and morphologic changes in bimetallic nanoparticles, Journal of Colloid and Interface Science, Volume 524, 2018, Pages 177-187.

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Repositorio IPICYT

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