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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network
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A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network

机译：基于镉 - 膦酸盐网络的快速和高选择的刚果红色吸附材料

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摘要

In this work, a cadmium-phosphonate network was prepared based on a tetrahedral shaped tetraphosphonic acid linker. The resulting three-dimensional compound Cd-4(H4L)(2)(phen)(2)(H2O)(4) (1) exhibited a rapid and efficient adsorption of Congo red (CR) dye, the adsorption capacity of which reached 684 mg g(-1). Furthermore, this adsorbent showed excellent structural stability and adsorptive recyclability after three times of adsorption and desorption. The absorption kinetics fitted well with the pseudo-second-order kinetic model, revealing that the adsorption of the cadmium-phosphonate compound undergoes a chemical process, where hydrogen bonding between the amide groups (from CR) and the uncoordinated phosphonate oxygen atoms of the compound plays a pivotal role.
机译：在这项工作中，基于四面体形状的四膦酸接头制备镉 - 膦酸核网络。 得到的三维化合物CD-4（H4L）（2）（2）（2）（2）（4）（4）（4）表现出快速有效地吸附刚果红（Cr）染料，其吸附能力达成 684 mg g（-1）。 此外，在吸附和解吸三次后，该吸附剂显示出优异的结构稳定性和吸附可回收性。 吸收动力学与伪二阶动力学模型很孔，揭示镉 - 膦酸酯化合物的吸附经历了化学过程，其中酰胺基（来自Cr）和化合物的未配制的膦酸氧原子之间的氢键 发挥关键作用。

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