Ultra-selective uranium separation by in-situ formation of π-f conjugated 2D uranium-organic framework

Qing Yun Zhang, Lin Juan Zhang, Jian Qiu Zhu, Le Le Gong, Zhe Cheng Huang, Feng Gao, Jian Qiang Wang, Xian Qing Xie and Feng Luo ()
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Qing Yun Zhang: East China University of Technology
Lin Juan Zhang: Chinese Academy of Sciences
Jian Qiu Zhu: Chinese Academy of Sciences
Le Le Gong: State Key Laboratory of NBC Protection for Civilian
Zhe Cheng Huang: East China University of Technology
Feng Gao: East China University of Technology
Jian Qiang Wang: Chinese Academy of Sciences
Xian Qing Xie: Jiangxi Normal University
Feng Luo: East China University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract With the rapid development of nuclear energy, problems with uranium supply chain and nuclear waste accumulation have motivated researchers to improve uranium separation methods. Here we show a paradigm for such goal based on the in-situ formation of π-f conjugated two-dimensional uranium-organic framework. After screening five π-conjugated organic ligands, we find that 1,3,5-triformylphloroglucinol would be the best one to construct uranium-organic framework, thus resulting in 100% uranium removal from both high and low concentration with the residual concentration far below the WHO drinking water standard (15 ppb), and 97% uranium capture from natural seawater (3.3 ppb) with a record uptake efficiency of 0.64 mg·g−1·d−1. We also find that 1,3,5-triformylphloroglucinol can overcome the ion-interference issue such as the presence of massive interference ions or a 21-ions mixed solution. Our finds confirm the superiority of our separation approach over established ones, and will provide a fundamental molecule design for separation upon metal-organic framework chemistry.

Date: 2024
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DOI: 10.1038/s41467-023-44663-4

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