β-环糊精/Fe3O4水基磁流体的制备表征及其对中性红的吸附行为

doi:10.3724/SP.J.1095.2014.30358

摘要/Abstract

摘要： 采用化学共沉淀方法合成了柠檬酸化β-环糊精（CA-β-CD）修饰的水基磁流体。运用红外光谱（FTIR）、透射电子显微镜（TEM）、热重分析（TGA）、X射线衍射（XRD）和振动样品磁强计（VSM）对其结构、形貌、组成成分和磁性能进行了表征。结果显示，磁流体粒子分散性良好，粒径分布在(7±2) nm范围；磁流体具有超顺磁性，CA-β-CD修饰前后的饱和磁化值分别为62和43 A·m2/Kg。将磁流体用于染料中性红（NR）的吸附，考察了吸附时间、NR初始浓度及溶液pH值对吸附作用的影响。结果显示，磁流体在中性条件下对NR的吸附效果最佳，最大吸附量为244 mg/g，吸附效率最高可达99.8%。

关键词: &, beta, -环糊精, 水基磁流体, 制备, 吸附, 中性红

Abstract: Citric acid grafted β-cyclodextrin(CA-β-CD) modified water-based Fe3O4 magnetic fluid was synthesized via chemical coprecipation method. The structure, morphology, composition and magnetic property of the magnetic fluid were characterized by Fourier transform infrared spectroscopy(FTIR), transmission electron microscopy(TEM), thermogravimetric analysis(TGA), X-ray diffraction(XRD) and vibrating sample magnetometer(VSM). The results show that the magnetic particles of magnetic fluid disperse well and the diameters are in the range of (7±2) nm .The magnetic fluid is super-paramagnetic and magnetic saturation values are 62 A·m2/Kg and 43 A·m2/Kg before and after modification by CA-β-CD. The magnetic fluid was used as an adsorbent for neutral red(NR). The adsorption time, the initial concentration of NR and pH of the solution were studied. The results show that the magnetic fluid has the highest adsorption effect for NR, maximum adsorption capacity is 244 mg/g and the adsorption efficiency is up to 99.8% under the neutral condition.

Key words: &, beta, -cyclodextrin, water-based magnetic fluid, preparation, adsorption, neutral red

中图分类号:

O643

黄丽珍, 李二冬, 李波, 杨永刚, 董川, 双少敏. β-环糊精/Fe₃O₄水基磁流体的制备表征及其对中性红的吸附行为[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30358.

HUANG Lizhen1, LI Erdong1, LI Bo1, YANG Yonggang2, DONG Chuan1, SHUANG Shaomin1*. Preparation of Water-based β-Cyclodextrin/Fe₃O₄ Magnetic Fluid and Its Adsorption Behavior for Neutral Red[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30358.

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β-环糊精/Fe₃O₄水基磁流体的制备表征及其对中性红的吸附行为

Preparation of Water-based β-Cyclodextrin/Fe₃O₄ Magnetic Fluid and Its Adsorption Behavior for Neutral Red

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