β-Cyclodextrin Modified With Magnetic Nanoparticles Noncovalently for β-Naphthol Removal From Wastewater

Magnetic cyclodextrin nanocomposites (-CD-Fe3O4) were prepared with magnetic nanoparticles (Fe3O4) and -cyelodextrin (-CD) via the simple co-precipitation method. The product was characterized by X-ray diffraction (XRD), Thermogravity analysis (TGA) and scanning electron microscopy (SEM). UV-vis spectra and fluorescence spectra proved that the -CD-Fe3O4 could form host-guest inclusion complexes with -naphthol (-NOH), so -CD-Fe3O4 nanocomposites could detect and remove -NOH from wastewater as a spectral probe. Furthermore, as a magnetic material, the -CD-Fe3O4 nanocomposites could be separated easily from aqueous solution by an external magnet, collected, and used circularly.