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  

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

作　　者：孙琳琳[1] 周叶红[1] 王斐[1] 双少敏[1] 董川[1] 

机构地区：[1]山西大学环境科学研究所环境与资源学院,太原030006

出　　处：《应用化学》2015年第1期110-117,共8页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(21175086)资助项目~~

摘　　要：基于SN2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(Rh B)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54emu/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。Carboxymethyl-β-cyclodextrin （CM-β-CD） synthesized by SN 2 substitution was employed successfully on the modification of the surface of the Fe304 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-fl-CD-MNPs on rhodamine B（RbB） were investigated. The results show that CM-fl-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.

关 键 词：羧甲基-β-环糊精 四氧化三铁 吸附 

分 类 号：O647.3[理学—物理化学]