Regenerable and stable sp² carbon-conjugated covalent organic frameworks for selective detection and extraction of uranium.

ABSTRACT: Uranium is a key element in the nuclear industry, but its unintended leakage has caused health and environmental concerns. Here we report a sp² carbon-conjugated fluorescent covalent organic framework (COF) named TFPT-BTAN-AO with excellent chemical, thermal and radiation stability is synthesized by integrating triazine-based building blocks with amidoxime-substituted linkers. TFPT-BTAN-AO shows an exceptional UO₂²⁺ adsorption capacity of 427 mg g^-1 attributable to the abundant selective uranium-binding groups on the highly accessible pore walls of open 1D channels. In addition, it has an ultra-fast response time (2 s) and an ultra-low detection limit of 6.7 nM UO₂²⁺ suitable for on-site and real-time monitoring of UO_2<

SUBMITTER: Cui WR 

PROVIDER: S-EPMC6978342 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature