School of Biology, Chemistry and Material Science, East China University of Technology, Fuzhou, Jiangxi, 344000, China.
Angew Chem Int Ed Engl. 2017 Dec 18;56(51):16376-16379. doi: 10.1002/anie.201709197. Epub 2017 Nov 20.
A significant synergic effect between a metal-organic framework (MOF) and Fe SO , the so-called MOF technique, is exploited for the first time to remove toxic chromate from aqueous solutions. The results show that relative to the pristine MOF samples (no detectable chromate removal), the MOF method enables super performance, giving a 796 Cr mg g adsorption capacity. The value is almost eight-fold higher than the best value of established MOF adsorbents, and the highest value of all reported porous adsorbents for such use. The adsorption mechanism, unlike the anion-exchange process that dominates chromate removal in all other MOF adsorbents, as unveiled by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), is due to the surface formation of Fe Cr (OH) nanospheres on the MOF samples.
首次利用金属-有机骨架（MOF）与 FeSO4 的协同效应（即 MOF 技术）从水溶液中去除有毒的铬酸盐。结果表明，与原始 MOF 样品（检测不到铬酸盐去除）相比，MOF 法实现了超高性能，吸附容量高达 796mg/g。该值几乎是已建立的 MOF 吸附剂中最佳值的八倍，也是所有用于此类用途的多孔吸附剂中报告的最高值。吸附机制与 X 射线光电子能谱（XPS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）揭示的其他所有 MOF 吸附剂中占主导地位的阴离子交换过程不同，而是由于 MOF 样品表面形成了 FeCr(OH)纳米球。
