Posted by In this paper, a magnetic hybrid system was produced by supramolecular self-assembly between low-cost precursors: the sulfobutylether-β-cyclodextrin (SBECD) and magnetic iron oxide-based nanoparticles (MNPs). The interaction between the SBECD and MNPs was elucidated by spectroscopic (Fourier Transform Infrared − FT-IR, X-ray Photoelectron Spectroscopy – XPS, micro X-ray fluorescence – μXRF) and imaging (Transmission Electron Microscopy − TEM) techniques. The resulting MNPs@SBECD assembly was also characterized by thermogravimetric analysis to establish the amount of the organic moiety. The colloidal features were evaluated by dynamic light scattering measurements and an adapted turbidimetric analysis. Finally, a promising use of MNPs@SBECD as remediation agent against paraquat (chosen as a model of cationic pollutant), has been demonstrated. The sequestering mechanism, depending on the concentration and by electrostatic interactions, was ascertained.
Concentration and time dependent water remediation experiments reported as absorbance differences at the absorbtion maximum of paraquat (258 nm) as a function of time (min). A) [Paraquat] = 10 μM, [MNPs@Captisol] = variable (82 μg mL−1 and 62.5 μg mL−1); B) [MNPs@Captisol] = 62.5 μg mL−1, [Paraquat] = variable (10 μM, 15 μM and 20 μM).
Nina Burduja, Giuseppe Nocito, Mariachiara Trapani, Alberto Riminucci, Riccardo Di Corato, Antonio Della Torre, Angelo Nicosia, Antonino Gulino, Placido Giuseppe Mineo, Antonino Mazzaglia (2025) A supramolecular assembly made with sulfobutylether-β-cyclodextrin and magnetic Fe3O4 showing water remediation properties. Journal of Molecular Liquids 429, 127625. https://doi.org/10.1016/j.molliq.2025.127625