氨基修饰UIO-66的锆基金属有机骨架吸附去除水中全氟辛酸
Tailoring Zr-based metal organic frameworks by decorating UIO-66 with amino group for adsorption removal of perfluorooctanoic acid from water
摘要：
作为一种持久性污染物，全氟辛酸在全球范围内的分布和残留对自然生态系统和人类健康构成严重威胁。目前，吸附技术是一种很有前途的去除PFOA的方法。MOFs以其独特的可设计性和易于模块化合成的特点成为备受关注的吸附剂。本研究以提高锆基MOF UiO-66对PFOA的吸附性能为目的，引入氨基修饰锆基MOF UiO-66。随后引入GO对UiO-66-NH 2进行改性，探讨疏水性对PFOA吸附去除的影响。通过对合成产物的性能表征，探讨了PFOA的吸附去除效果及相应的吸附机理。结果表明，氨基的引入增大了孔径，同时表现出较强的疏水作用，吸附容量显著提高（最大吸附容量为1653 mg/g）。本研究不仅为锆基MOFs引入氨基以增强其疏水性能从而达到高效去除PFOA的目的提供了方法，而且为定制MOFs去除水中持久性有机污染物提供了可行的参考。
英文摘要：
As a persistent pollutant, PFOA places a serious threat to natural ecosystems and human health for its global distribution and residual. Currently, adsorption technology is a promising approach for PFOA removal. MOFs become a concerned adsorbent attributing to its special designability and easy modular synthesis. Aiming at improving hydrophobic interactions to absorb PFOA, this study was designed to introduce amino group to decorate Zr-based MOF UiO-66. And subsequently introduced GO to modify UiO-66-NH2 to explore the influence of hydrophobicity on PFOA adsorption removal. Based on the performance of the characterization of synthesized products, the adsorption removal effect of PFOA and the corresponding adsorption mechanism were discussed. The results indicate the introduction of the amino group could enlarge the pore size, but also display strong hydrophobic effects, significantly enhance the adsorption capacity(maximum capacity was 1653mg/g). This work not only provides the method of introducing amino group to Zr-based MOFs to strengthen the hydrophobic properties in purpose of removing PFOA efficiently, but also proposes the feasible the reference for tailoring MOFs to remove endurable organic pollutants in water.
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