Synthesis and characterization of a novel organic–inorganic hybrid supramolecular recognition material and its selective adsorption for cesium
Synthesis and characterization of a novel organic–inorganic hybrid supramolecular recognition material and its selective adsorption for cesium
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DOI：
10.1007/s10967-013-2798-y
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发表时间：
2013
影响因子：
1.6
通讯作者：
Chengliang Xiao;A. Zhang;Z. Chai
中科院分区：
文献类型：
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作者：
Chengliang Xiao;A. Zhang;Z. Chai
为了从高活性液体废物中分离Cs(I)，合成了一种大孔二氧化硅基25, 27-双(异丙氧基)calix[4]arene-26,28-crown-6 (BiPCalix[4]C6)超分子识别材料BiPCalix[4]C6/SiO2-P，并通过SEM、FT-IR和TG-DSC进行了表征。比较了 BiPCalix[4]C6/SiO2-P 和基于大孔聚合物的超分子识别复合材料 BiPCalix[4]C6/XAD-7 的吸附性能。结果发现，BiPCalix[4]C6/SiO2-P 比 BiPCalix[4]C6/XAD-7 表现出更好的吸附能力和更快的吸附动力学。在 298 K 下研究了 BiPCalix[4]C6/SiO2-P 上 Cs(I) 的吸附等温线，并通过 Langmuir 等温线模型很好地描述了该等温线。通过研究 BiPCalix[4]C6、Cs(I) 和 H+ 浓度对吸附的影响，确定 BiPCalix[4]C6/SiO2–P 和 Cs(I) 之间的络合物组成为 1:1 类型。同时，研究了BiPCalix[4]C6/SiO2-P对Na(I)、K(I)、Rb(I)、Cs(I)、Sr(II)、Ba(II)、Ru(III)、Mo(VI)、La(III)和Y(III)的选择性。
To separate Cs(I) from highly active liquid waste, a macroporous silica-based 25, 27-bis(iso-propyloxy)calix[4]arene-26,28-crown-6 (BiPCalix[4]C6) supramolecular recognition material, BiPCalix[4]C6/SiO2–P, was synthesized and characterized by SEM, FT-IR, and TG-DSC. The adsorption properties of BiPCalix[4]C6/SiO2–P and a macroporous polymer-based supramolecular recognition composite, BiPCalix[4]C6/XAD-7, were compared. It was found that BiPCalix[4]C6/SiO2–P exhibited better adsorption ability and faster adsorption dynamics than BiPCalix[4]C6/XAD-7. The adsorption isotherm of Cs(I) onto BiPCalix[4]C6/SiO2–P was studied at 298 K and it was well described by Langmuir isotherm model. The complex composition between BiPCalix[4]C6/SiO2–P and Cs(I) was determined as 1:1 type by investigating the effect of the concentrations of BiPCalix[4]C6, Cs(I), and H+on the adsorption. Meanwhile, the selectivity of BiPCalix[4]C6/SiO2–P towards Na(I), K(I), Rb(I), Cs(I), Sr(II), Ba(II), Ru(III), Mo(VI), La(III), and Y(III) was investigated.