DEEPRASERT, Saruta; WANG, Lilin; SIMEONIDIS, Konstantinos; THANH, Nguyen Thi Kim; DUGUET, Etienne; MOURDIKOUDIS, Stefanos

doi:10.1039/d0ra09907d

Métadonnées

Licence d’utilisation du document

DEEPRASERT, Saruta
Department of Physics and Astronomy [UCL London]
UCL Healthcare Biomagnetic and Nanomaterials Laboratories

WANG, Lilin
Department of Physics and Astronomy [UCL London]
UCL Healthcare Biomagnetic and Nanomaterials Laboratories

SIMEONIDIS, Konstantinos
Aristotle University of Thessaloniki

Langue

Article de revue

Ce document a été publié dans

RSC Advances. 2021, vol. 11, n° 3, p. 1343-1353

Royal Society of Chemistry

Résumé en anglais

We report the synthesis of nanocomposites made of silica nanoparticles whose six surface dimples are decorated with magnetic maghemite nanoparticles and their use for detection and recovery of arsenic in aqueous media. Precursor silica nanoparticles have aminated polystyrene chains at the bottom of their dimples and the maghemite nanoparticles are surface functionalized with carboxylic acid groups in two steps: amination with 3-aminopropyltrimethoxysilane, then derivatization with succinic anhydride in the presence of triethylamine. In the end, the colloidal assembly consists of the regioselective grafting of the carboxylic acid-modified iron oxide nanoparticles onto the 6-dimple silica nanoparticles. Several characterization techniques such as transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) are employed to assess the grafting process and study the influence of the maghemite functional groups on the quality of the composites formed. The resulting magnetic nanocomposites are used for the environmentally benign detection and removal of arsenic from aqueous medium, being readily extracted through means of magnetic separation.< Réduire

DOI

http://dx.doi.org/10.1039/d0ra09907d

Project ANR

Dilater le système atomique conventionnel à l'échelle colloïdale grâce à des particules préprogrammées pour une valence donnée - ANR-15-CE09-0010
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026