Adsorption Properties of Carboxymethyl-β-cyclodextrin Functionalized Ferroferric Oxide Magnetic Nanocomposites on Rhodamine B

Carboxymethyl-β-cyclodextrin( CM-β-CD) synthesized by SN2 substitution was employed successfully on the modification of the surface of the Fe3O4 magnetic nanoparticles( MNPs) using a layer-bylayer method. The as-prepared CM-β-CD functionalized magnetic nanocomposites( CM-β-CD-MNPs) were characterized by transmission electron microscopy( TEM),Fourier transform infrared spectroscopy( FTIR) and vibrating sample magnetometer( VAM). The adsorption properties of CM-β-CD-MNPs on rhodamine B( Rh B)were investigated. The results show that CM-β-CD-MNPs are nearly spherical,with an average particle diameter of 16 nm,and are superparamagnetic with a relatively high saturation magnetization value of 54 emu / g.Adsorption kinetic coincides with the pseudo-second-order kinetic model and the adsorption equilibrium is reached within 1 h. Adsorption isotherm fits well to Langmuir adsorption model and the maximum adsorption reaches up to 135. 1 mg / g.