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题名:
Highly Sensitive and Selective Uranium Detection in Natural Water Systems Using a Luminescent Mesoporous Metal-Organic Framework Equipped with Abundant Lewis Basic Sites: A Combined Batch, X-ray Absorption Spectroscopy, and First Principles Simulation Investigation
作者: Liu, W; Dai, X; Bai, ZL; Wang, YL; Yang, ZX; Zhang, LJ; Xu, L; Chen, LH; Li, YX; Gui, DX; Juan, DW; Wang, JQ; Zhou, RH; Chai, ZF; Wang, SA
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期: 2017
卷号: 51, 期号:7, 页码:3911-3921
DOI: 10.1021/acs.est.6b06305
文章类型: 期刊论文
英文摘要: Uranium is not only a strategic resource for the nuclear industry but also a global contaminant with high toxicity. Although several strategies have been established for detecting uranyl-ions in water, searching for new uranium sensor material with great sensitivity, selectivity, and stability remains a challenge. We introduce here a hydrolytically stable mesoporous terbium(III)-based MOP material compound 1, whose channels are as large as 27 angstrom x 23 angstrom and are equipped with abundant exposed Lewis basic sites, the luminekence intensity of which can be efficiently and selectively quenched by uranyl ions. The detection limit in deionized water reaches 0.9 mu g/L, far below the maximum contamination standard of 30 mu g/L in drinking water defined by the United States Environmental Protection Agency, making compound 1 currently the only MOF material that can achieve this goal. More importantly, this material exhibits great capability in detecting uranyl ions in natural water systems such as lake water and seawater with pH being adjusted to 4, where huge excesses of competing ions are present. The uranyl detection limits in Dushu Lake water and in seawater were calculated to be 14.0 and 3.5 mu g/L, respectively. This great detection capability originates from the selective binding of uranyl ions onto the Lewis basic sites of the MOF material, as demonstrated by synchrotion radiation extended X-ray adsorption fine structure, X-ray adsorption near edge structure, and first principles calculations, further leading to an effective energy transfer between the uranyl ions and the MOF skeleton.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000398646500037
ISSN号: 0013-936X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27345
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Liu, W,Dai, X,Bai, ZL,et al. Highly Sensitive and Selective Uranium Detection in Natural Water Systems Using a Luminescent Mesoporous Metal-Organic Framework Equipped with Abundant Lewis Basic Sites: A Combined Batch, X-ray Absorption Spectroscopy, and First Principles Simulation Investigation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017-01-01,51(7):3911-3921.
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