cof负载Zn-PBA复合材料对铯†的高效去除

IF 2.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

New Journal of Chemistry Pub Date : 2025-07-17 DOI:10.1039/D5NJ02523K

Jie Jiang, Yuanyuan Zhou, Jiayin Hu, Jingyi He, Yafei Guo, Tianlong Deng and Tong Pan

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引用次数: 0

摘要

在本研究中，通过配位作用将锌基普鲁士蓝类似物（Zn-PBA）纳米颗粒固定在共价有机骨架（COF-LZU1）上，成功合成了Zn-PBA/LZU1复合材料。与粉状Zn-PBA相比，该复合材料对Cs+的吸附量（279.15 mg g−1）和快速平衡（20 min）显著提高。这种Zn-PBA/LZU1对Cs+表现出显著的选择性，即使暴露于高浓度的竞争离子，如Na+、K+、Ca2+和Mg2+。它在很宽的pH范围内（2-12）表现出一致的性能。此外，经过5次再生循环后，该复合材料的平均吸附效率仍保持在初始吸附效率的75%以上，突出了其可重复使用和可持续性。实验结果表明，吸附机制涉及K+/Cs+离子交换。

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A COF-supported Zn-PBA composite for the efficient removal of cesium†

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A COF-supported Zn-PBA composite for the efficient removal of cesium†

In this study, the Zn-PBA/LZU1 composite was successfully synthesized by anchoring the zinc-based Prussian blue analog (Zn-PBA) nanoparticles onto a covalent organic framework (COF-LZU1) through coordination interactions. The resulting composite exhibited significantly enhanced adsorption capacity (279.15 mg g⁻¹) and rapid equilibrium attainment (20 min) for Cs⁺ compared to powdered Zn-PBA. This Zn-PBA/LZU1 exhibited remarkable selectivity for Cs⁺, even when exposed to high concentrations of competing ions such as Na⁺, K⁺, Ca²⁺, and Mg²⁺. It demonstrated consistent performance across a wide pH range (2–12). Furthermore, the composite retained an average of over 75% of its initial adsorption efficiency after five regeneration cycles, highlighting its reusability and sustainability. The experimental results suggested that the adsorption mechanism involved K⁺/Cs⁺ ion exchange.