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应用化学
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应用化学  2015, Vol. 32 Issue (1): 110-117    DOI: 10.11944/j.issn.1000-0518.2015.01.140147
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
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
孙琳琳, 周叶红, 王斐, 双少敏, 董川*
山西大学环境科学研究所 环境与资源学院 太原 030006
Adsorption Properties of Carboxymethyl-β-cyclodextrin Functionalized Ferroferric Oxide Magnetic Nanocomposites on Rhodamine B
SUN Linlin, ZHOU Yehong, WANG Fei, SHUANG Shaomin, DONG Chuan*
Institute of Environmental Science, College of Environmental and Resource Sciences,Shanxi University,Taiyuan 030006,China
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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(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。

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孙琳琳
周叶红
王斐
双少敏
董川
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 SN2 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 wordscarboxymethy-β-cyclodextrin    ferroferric oxide    adsorption    rhodamine B
收稿日期: 2014-04-25      修回日期: 2014-06-24     
CLC:  O647.3  
基金资助:

国家自然科学基金(21175086) 资助项目

通讯作者: 通讯联系人:董川,教授; Tel:0351-7010958; Fax:0351-7018613; E-mail:dc@sxu.edu.cn; 研究方向:环境分析化学     E-mail: dc@sxu.edu.cn
引用本文:   
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. Chinese Journal of Applied Chemistry, 2015, 32(1): 110-117.
链接本文:  
http://yyhx.ciac.jl.cn/CN/10.11944/j.issn.1000-0518.2015.01.140147      或      http://yyhx.ciac.jl.cn/CN/Y2015/V32/I1/110
图1

CM-β-CD-MNPs的透射电镜图

Fig.1

TEM image of CM-β-CD-MNPs

图2

傅里叶变换红外光谱图

Fig.2

FTIR spectra

a.β-CD; b.CM-β-CD; c.CM-β-CD-MNPs

图3

室温条件下CM-β-CD-MNPs的磁化率曲线

Fig.3

Magnetization curve of CM-β-CD-MNPs at room temperature

Illustration a:CM-β-CD-MNPs suspension; b.external magnetic separation after 1 min

图4

pH值对吸附量的影响

Fig.4

Effect of pH on adsorption

Illustration: the dispersion of CM-β-CD-MNPs in the PBS

图5

RhB在水溶液中的结构式

Fig.5

Structrues of RhB in aqueous solution

图6

温度对吸附量的影响

Fig.6

Effect of temperature on adsorption

图7

离子强度对吸附量的影响

Fig.7

Effect of ionic strength on adsorption

Illustration a.the dispersion of CM-β-CD-MNPs in the solution of ionic strength>1; b.standing for 5 min

图8

CM-β-CD-MNPs对RhB的吸附动力学

Fig.8

Adsorption kinetic curve of CM-β-CD-MNPs on RhB

图9

吸附动力学线性拟合

Fig.9

Pseudo-first(A) pseudo-second(B) linear fitting of adsorption kinetic curve

图10

CM-β-CD-MNPs对RhB吸附等温线

Fig.10

Adsorption isotherm of RhB on CM-β-CD-MNPs

图11

吸附等温线性拟合

Fig.11

Langmuir(A) and Freundlich(B) linear fitting of adsorption isotherm

图12

CM-β-CD-MNPs的循环利用

Fig.12

Recycling performance of CM-β-CD-MNPs

Adsorption isotherms Langmuir Freundlich
Parameters Qm/(mg·g-1) 135.1 n 1.588
KL/(L·mg-1) 1.089 KF/(mg·g-1) 63.1
R2 0.9928 R2 0.9616
表1

CM-β-CD-MNPs对RhB吸附平衡参数

Table 1

Adsorption isotherm parameters of RhB on CM-β-CD-MNPs

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