羧甲基-β-环糊精功能化的四氧化三铁磁性纳米复合物对罗丹明B的吸附性能

doi:10.11944/j.issn.1000-0518.2015.01.140147

摘要/Abstract

摘要：

基于S_N2取代反应制备了羧甲基-β-环糊精(CM-β-CD),采用层层组装法将其成功修饰在Fe₃O₄磁性纳米粒子表面(MNPs),得到了CM-β-CD功能化的磁性纳米复合物(CM-β-CD-MNPs),通过透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)及振动样品磁强计(VSM)等技术手段进行了表征,考察了其对染料罗丹明B(RhB)的吸附性能。结果表明,CM-β-CD-MNPs呈球形,分散均匀,平均粒径为16 nm,饱和磁化率为54 emu/g,呈超顺磁性。吸附动力学符合准二级动力学模型,且吸附1 h达到平衡。吸附等温线符合Langmuir等温吸附模型,最大吸附量为135.1 mg/g。

关键词: 羧甲基-β-环糊精, 四氧化三铁, 吸附, 罗丹明B

Abstract:

Carboxymethyl-β-cyclodextrin(CM-β-CD) synthesized by S_N2 substitution was employed successfully on the modification of the surface of the Fe₃O₄ magnetic nanoparticles(MNPs) using a layer-by-layer 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.

Key words: carboxymethy-β-cyclodextrin, ferroferric oxide, adsorption, rhodamine B

中图分类号:

O647.3

孙琳琳, 周叶红, 王斐, 双少敏, 董川. 羧甲基-β-环糊精功能化的四氧化三铁磁性纳米复合物对罗丹明B的吸附性能[J]. 应用化学, 2015, 32(1): 110-117.

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.

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