Tan Huanhuan, Tang Yang, Hou Zewei, Yang Peipei, Liu Chuntai, Xie Zhipeng, Li Songwei
National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China.
Xiamen Branch of Luoyang Ship Material Research Institutes, Xiamen, Fujian 361116, China; National Key Laboratory of Marine Corrosion and Protection, Xiamen, Fujian 361116, China.
J Colloid Interface Sci. 2025 Jan;677(Pt A):435-445. doi: 10.1016/j.jcis.2024.07.252. Epub 2024 Jul 31.
Extraction uranium (VI) (U(VI)) from wastewater and seawater is highly important for environmental protection and life safety, but it remains a great challenge. In this work, the growth of the zeolitic imidazolate framework-8 (ZIF-8) nanoparticles on the tannic acid (TA)-3-aminopropyltriethoxysilane (APTES) modified PVDF (TAP) membrane was designed to obtain an excellent U(VI) adsorbent. The zeolite imidazolate framework composite membrane (TAPP-ZIF-60) was prepared through polyethyleneimine (PEI) bridging strategy and temperature regulation strategy in solvothermal method. The coordination bond between PEI and ZIF-8 and the covalent bond between PEI and TAP are essential in forming stable composite membrane. TAPP-ZIF with different properties was synthesized through a temperature regulation process and the TAPP-ZIF prepared at 60 °C has the uniform morphology and good performance. The adsorption capacity of TAPP-ZIF-60 is 153.68 mg/g (C = 95.01 mg/L and pH = 8.0) and water permeability is 5459 L m h bar. After ten adsorption-desorption cycles, it is proved that TAPP-ZIF-60 has good repeatability and stability. In addition, the TAPP-ZIF-60 composites membrane has a good inhibitory effect on Staphylococcus aureus and Escherichia coli. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) analysis reveal that the coordination between TAPP-ZIF-60 and uranyl ions is the primary factor contributing to the high adsorption capacity.
从废水和海水中提取铀（VI）（U(VI)）对于环境保护和生命安全至关重要，但仍然是一个巨大的挑战。在这项工作中，设计在单宁酸（TA）-3-氨丙基三乙氧基硅烷（APTES）改性的聚偏氟乙烯（TAP）膜上生长沸石咪唑酯骨架-8（ZIF-8）纳米颗粒，以获得优异的U(VI)吸附剂。通过聚乙烯亚胺（PEI）桥接策略和溶剂热法中的温度调节策略制备了沸石咪唑酯骨架复合膜（TAPP-ZIF-60）。PEI与ZIF-8之间的配位键以及PEI与TAP之间的共价键对于形成稳定的复合膜至关重要。通过温度调节过程合成了具有不同性质的TAPP-ZIF，在60℃制备的TAPP-ZIF具有均匀的形貌和良好的性能。TAPP-ZIF-60的吸附容量为153.68 mg/g（C = 95.01 mg/L，pH = 8.0），水通量为5459 L m h bar。经过十次吸附-解吸循环，证明TAPP-ZIF-60具有良好的重复性和稳定性。此外，TAPP-ZIF-60复合膜对金黄色葡萄球菌和大肠杆菌具有良好的抑制作用。X射线光电子能谱（XPS）和密度泛函理论（DFT）分析表明，TAPP-ZIF-60与铀酰离子之间的配位是导致高吸附容量的主要因素。
