Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
J Colloid Interface Sci. 2020 Feb 15;560:321-329. doi: 10.1016/j.jcis.2019.10.077. Epub 2019 Oct 21.
In this work, water-stable Al-MIL-101 analogues were successfully synthesized by adjusting the Fe/Al ratio to obtain excellent phosphorus removal efficiencies. The introduction of Fe into the precursor solution allowed the final structure of aluminum metal-organic frameworks (Al-MOFs) to be tuned without introducing Fe into the final structure. The formation of Al-MIL-101 analogues with different morphologies and surface areas was accomplished by adjusting the Fe/Al molar ratio in the precursor solution. Compared with pure Fe-MIL-101 or Al-MIL-101, Al-MIL-101 analogues exhibited ultra-fast phosphorous adsorption kinetics and high phosphorous adsorption capacities. Al-MIL-101, produced with an Fe/Al feed molar ratio of 0.5, achieved a maximum phosphorus uptake capacity of 90 mg P/g, which is much higher than the phosphorus absorption reported in most literatures. More importantly, the Al-MIL-101 analogue obtained using an Fe/Al molar ratio of 0.5 exhibited an excellent phosphorus removal efficiency, even after multiple adsorption/desorption cycles. These results indicate that Al-MOFs produced by adjusting the Fe amount in the precursor solution are promising candidates for the removal of phosphate from water.
在这项工作中，通过调整 Fe/Al 比成功合成了水稳定的 Al-MIL-101 类似物，从而获得了优异的磷去除效率。在前驱体溶液中引入 Fe 可以调整最终的铝金属有机骨架（Al-MOFs）结构，而无需将 Fe 引入最终结构中。通过调整前驱体溶液中的 Fe/Al 摩尔比，可以制备具有不同形貌和比表面积的 Al-MIL-101 类似物。与纯 Fe-MIL-101 或 Al-MIL-101 相比，Al-MIL-101 类似物表现出超快的磷吸附动力学和高的磷吸附容量。以 Fe/Al 进料摩尔比为 0.5 制备的 Al-MIL-101 达到了 90mg P/g 的最大磷吸收容量，这远高于大多数文献报道的磷吸收值。更重要的是，以 Fe/Al 摩尔比为 0.5 制备的 Al-MIL-101 类似物在多次吸附/解吸循环后仍具有优异的磷去除效率。这些结果表明，通过调整前驱体溶液中 Fe 含量制备的 Al-MOFs 是从水中去除磷酸盐的有前途的候选材料。
