Chem
ArticleRadiation Controllable Synthesis of Robust Covalent Organic Framework Conjugates for Efficient Dynamic Column Extraction of 99TcO4−
The Bigger Picture
99Tc is one of the most problematic fission products in used nuclear fuel due to its high yield, radiation hazard, and high mobility of its typical species 99TcO4−. Anion-scavenging materials tailored for 99TcO4− trapping are, thus, urgently needed for both environmental remediation and management of spent nuclear fuel. Covalent organic frameworks (COFs) as a new class of porous crystalline materials represent one of the most promising adsorbents for TcO4−. Before their application, however, the rational construction of COF conjugates suitable for column tests is quite necessary but challenging.
By adopting the ionizing radiation strategy, we constructed ultra-robust imidazolium-decorated COF conjugates and achieved tunable TcO4− uptake with the emphasis on the advantages of the COFs in terms of column experiments. This work suggests attractive opportunities of the COFs in practical radionuclide separation and also contribute to solving the practical issues of MOF and COF applications.
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UN Sustainable Development Goals
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