In this study, efforts were made to prepare a porous aromatic framework (PAF) with build-in magnetic nanoparticles (Fe₃O₄-PAF) for use as an efficient adsorbent for the removal of organic pollutants from water. The Fe₃O₄-PAF showed good handleability and could be recovered easily by magnetic separation. As a proof of concept, the adsorption properties of Fe₃O₄-PAF were investigated to remove 2,4-dichlorophenol (2,4-DCP) and bisphenol A (BPA) from water. The Fe₃O₄-PAF showed a fast adsorption rate, high adsorption efficiency and high adsorption capacities. It adsorbed 2,4-DCP (0.1 mmol L⁻¹) and BPA (0.1 mmol L⁻¹) with pseudo-second-order rate constant (k₂) of 2.1 and 3.54 g mg⁻¹ min⁻¹, respectively. According to the Langmuir isotherm model, the maximum adsorption capacities of 2,4-DCP and BPA onto Fe₃O₄-PAF were calculated to be 234.74 and 233.65 mg g⁻¹, respectively. The Fe₃O₄-PAF also featured good tolerance to harsh conditions, facilitating its application in a real water environment. It could be regenerated easily and reused multiple times without obvious loss of efficiency. In summary, this study provides a general and effective way to improve the handleability of PAFs and expands the practical application of PAF-based materials.

在这项研究中，我们努力制备一种内置磁性纳米粒子（Fe ₃ O ₄ -PAF）的多孔芳香骨架（PAF），用作去除水中有机污染物的有效吸附剂。Fe ₃ O ₄ -PAF表现出良好的可操作性并且可以通过磁分离容易地回收。作为概念验证，我们研究了Fe ₃ O _{4 -PAF 的吸附特性，以去除水中的 2,4-二氯苯酚 (2,4-DCP) 和双酚 A (BPA)。}Fe ₃ O ₄ -PAF表现出吸附速率快、吸附效率高和吸附容量高的特点。它吸附2,4-DCP (0.1 mmol L ^-1 )和BPA (0.1 mmol L ^-1 )，准二级速率常数( k ₂ )分别为2.1和3.54 g mg ^-1 min ^-1。根据Langmuir等温线模型计算出Fe ₃ O _{4 -PAF对2,4-DCP和BPA的最大吸附容量分别为234.74和233.65 mg g} ^-1。Fe ₃ O ₄ -PAF还具有良好的耐恶劣条件的特性，有利于其在实际水环境中的应用。它可以很容易地再生并重复使用多次，而不会明显损失效率。总之，本研究为提高PAF的可操作性并扩大PAF基材料的实际应用提供了一种通用且有效的方法。