Citation:
SUN Linlin, ZHOU Yehong, WANG Fei, SHUANG Shaomin, DONG Chuan. Adsorption Properties of Carboxymethyl-β-cyclodextrin Functionalized Ferroferric Oxide Magnetic Nanocomposites on Rhodamine B[J]. Chinese Journal of Applied Chemistry,
;2015, 32(1): 110-117.
doi:
10.11944/j.issn.1000-0518.2015.01.140147
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Carboxymethyl-β-cyclodextrin (CM-β-CD) synthesized by SN 2 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(RhB) 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.
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