Preparation of β-cyclodextrin/Fe₃O₄/polyvinylpyrrolidone composite magnetic microspheres for the adsorption of methyl orange

Abstract

Magnetic microspherical β-cyclodextrin(CD)/Fe₃O₄@polyvinylpyrrolidone(PVP) particles, in which embedded Fe₃O₄ particles were coated by β-CD/glutaraldehyde crosslinked PVP, were synthesized via electrostatic spray and thermal crosslinking technologies. The magnetic microspheres were characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy(SEM) and magnetic measurements, and the adsorption performance of the β-CD/Fe₃O₄@PVP composite nanoparticles for methyl orange was studied. The results show that the β-CD/Fe₃O₄@PVP microspheres could be quickly separated from the adsorption system under an external magnetic field within 30 s and that the adsorption capacity of the microspheres for methyl orange reaches greater than 90%, with a maximum adsorption quantity of 47.62 mg/g.

Keywords

Electrospray / β-Cyclodextrin / Adsorption / Methyl orange / Magnetic microsphere

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