Dimpled SiO₂@γ-Fe₂O₃ nanocomposites - fabrication and use for arsenic adsorption in aqueous medium.

ABSTRACT: 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), Fouri

SUBMITTER: Deeprasert S 

PROVIDER: S-EPMC8693525 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature