Ammoniating Covalent Organic Framework (COF) for High-Performance and Selective Extraction of Toxic and Radioactive Uranium Ions.

ABSTRACT: An ideal porous adsorbent toward uranium with not only large adsorption capacity and high selectivity but also broad applicability even under rigorous conditions is highly desirable but still extremely scarce. In this work, a porous adsorbent, namely [NH₄]⁺[COF-SO₃ ^-], prepared by ammoniating a SO₃H-decorated covalent organic framework (COF) enables remarkable performance for uranium extraction. Relative to the pristine SO₃H-decorated COF (COF-SO₃H) with uranium adsorption capacity of 360 mg g^-1, the ammoniated counterpart of [NH₄]⁺[COF-SO₃ ^-] affords ultrahigh uranium uptake up to 851 mg g^-1, creating a 2.4-fold enhancement. Such a value is the hig

SUBMITTER: Xiong XH 

PROVIDER: S-EPMC6702651 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature