Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater.
basic_science · Level V
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- Record sourced from PubMed, PMID 38650374.
- Also identified by DOI 10.1021/acsnano.4c00344.
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Abstract
Nuclear power plays a pivotal role in the global energy supply. The adsorption-based extraction of uranium from seawater is crucial for the rapid advancement of nuclear power. The phosphorus nitride imide (PN) nanotubes were synthesized in this study using a solvothermal method, resulting in chemically stable cross-linked tubular hollow structures that draw inspiration from the intricate snowflake fractal pattern. Detailed characterization showed that these nanotubes possess a uniformly distributed five-coordinated nanopocket, which exhibited great selectivity and efficiency in binding uranium. PN nanotubes captured 97.34% uranium from the low U-spiked natural seawater (∼355 μg L<sup>-1</sup>) and showed a high adsorption capacity (435.58 mg g<sup>-1</sup>), along with a distribution coefficient, <i>K</i><sub>d</sub><sup>U</sup> > 8.71 × 10<sup>7</sup> mL g<sup>-1</sup>. In addition, PN nanotubes showed a high adsorption capacity of 7.01 mg g<sup>-1</sup> in natural seawater. The facile and scalable production of PN nanotubes presented in this study holds implications for advancing their large-scale implementation in the selective extraction of uranium from seawater.