Functionalized Porous Aromatic Framework for Efficient Uranium Adsorption from Aqueous Solutions
Functionalized Porous Aromatic Framework for Efficient Uranium Adsorption from Aqueous Solutions
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DOI：
10.1021/acsami.7b01711
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发表时间：
2017-04-12
影响因子：
9.5
通讯作者：
Ma, Shengqian
中科院分区：
文献类型：
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作者：
Li, Baiyan;Sun, Qi;Ma, Shengqian
我们展示了从水中提取铀的多孔芳香族骨架的成功功能化，例如将PAF-1与铀酰螯合胺酮基团接枝。得到的胺肟化PAF-1(PAF-1-CH(2)AO)具有超过300 mg g(-1)的高吸铀能力，并在90分钟内有效地将水溶液中的铀酰浓度从4.1ppm降至低于1.0 ppb，远低于美国环保局设定的30 ppb的可接受限值。X-射线吸收精细结构光谱研究揭示了铀在PAF-1=CH(2)AO中的局域配位环境，表明UO22+与邻近的胺肟物种之间存在协同结合。
We demonstrate the successful functionalization of a porous aromatic framework for uranium extraction from water as exemplified by grafting PAF-1 with the uranyl chelating amidoxime group. The resultant amidoxime-functionalized PAF-1 (PAF-1-CH(2)AO) exhibits a high uranium uptake capacity of over 300 mg g(-1) and effectively reduces the uranyl concentration from 4.1 ppm to less than 1.0 ppb in aqueous solutions within 90 min, well below the acceptable limit of 30 ppb set by the US Environmental Protection Agency. The local coordination environment of uranium in PAF-1=CH(2)AO is revealed by X-ray absorption fine structure spectroscopic studies, which suggest the cooperative binding between UO22+ and adjacent amidoxime species.