The MOF+ Technique: A Significant Synergic Effect Enables High Performance Chromate Removal
The MOF+ Technique: A Significant Synergic Effect Enables High Performance Chromate Removal
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MOF 技术：显着的协同效应实现高性能铬酸盐去除
DOI：
10.1002/anie.201709197
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发表时间：
2017-12-18
影响因子：
16.6
通讯作者：
Luo, Feng
中科院分区：
文献类型：
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作者：
Luo, Ming Biao;Xiong, Yang Yang;Luo, Feng
首次利用金属有机框架（MOF）和Fe 2SO 4之间的显著协同效应，即所谓的MOF+技术，从水溶液中去除有毒的铬酸盐。结果表明，相对于原始的MOF样品（没有可检测的铬酸盐去除），MOF+方法能够实现卓越的性能，给出796 Cr mg g（-1）的吸附容量。该值几乎比已建立的MOF吸附剂的最佳值高出八倍，也是所有报道的用于此类用途的多孔吸附剂的最高值。通过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，与在所有其他MOF吸附剂中主导铬酸盐去除的阴离子交换过程不同，吸附机理是由于在MOF样品上形成Fe 0.75Cr 0.25（OH）（3）纳米球。
A significant synergic effect between a metalorganic framework (MOF) and Fe2SO4, 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(-1) 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 Fe0.75Cr0.25(OH)(3) nanospheres on the MOF samples.