Synthesis of Cyclen‐Functionalized Ethenylene‐Based Periodic Mesoporous Organosilica Nanoparticles and Metal‐Ion Adsorption Studies,ChemNanoMat

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Synthesis of Cyclen‐Functionalized Ethenylene‐Based Periodic Mesoporous Organosilica Nanoparticles and Metal‐Ion Adsorption Studies
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-09-15 , DOI: 10.1002/cnma.202000383
Hao Li _{1,

2} , Ani Vardanyan ₃ , Clarence Charnay ₂ , Laurence Raehm ₂ , Gulaim A. Seisenbaeva ₃ , Roser Pleixats ₁ , Jean‐Olivier Durand ₂

Affiliation

The preparation of two cyclens both possessing two triethoxysilyl groups through click chemistry is described. These two cyclens were incorporated into bis(triethoxysilyl)ethenylene‐based periodic mesoporous organosilica nanoparticles (PMO NPs) at different proportions of bis(triethoxysilyl)ethenylene/cyclens (90/10, 75/25). The obtained nanorods were analyzed with different techniques and showed high specific surface areas at low proportion of cyclens. The nanorods containing free amino groups of cyclen were then used for Ni(II) and Co(II) removal from model solutions. The kinetics and isotherms of adsorption of Ni(II) and Co(II) were determined, and the materials showed high uptake of metals (up to 3.9 mmol ⋅ g⁻¹). They demonstrated pronounced selectivity in separation of rare earth elements from late transition metals, e. g. Ni(II) and Co(II) by adsorption and even more so by controlled desorption.

中文翻译：

循环功能化乙烯基周期性介孔有机硅纳米粒子的合成及金属离子吸附研究

描述了通过点击化学制备均具有两个三乙氧基甲硅烷基的两个环素的方法。将这两个循环剂以不同比例的双（三乙氧基甲硅烷基）乙烯/循环剂（90/10，75/25）掺入到基于双（三乙氧基甲硅烷基）乙烯的周期性中孔有机硅纳米粒子（PMO NP）中。用不同的技术对获得的纳米棒进行了分析，结果表明在较低的周期数下，其比表面积较高。然后将含有cycln游离氨基的纳米棒用于从模型溶液中去除Ni（II）和Co（II）。测定了Ni（II）和Co（II）的吸附动力学和等温线，材料显示出高的金属吸收（高达3.9 mmol⋅g ^-1）。他们证明了从后期过渡金属（例如，N.O。）中分离稀土元素具有明显的选择性。G。Ni（II）和Co（II）的吸附作用，甚至受控脱附的作用甚至更多。

更新日期：2020-11-06

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