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<p>Rapid adsorption of radioactive substances is of great significance in emergency situations. A novel approach combining S-defect introduction and <i>in situ</i> phosphorization was employed to synthesize phosphorized WS<sub>2</sub> (WS<sub>2</sub>-PO<sub>4</sub>) for ultra-efficient uranium extraction. At an initial U (VI) concentration of 50&#xa0;mg·L<sup>−1</sup>, the adsorption of U(VI) by WS<sub>2</sub>-PO<sub>4</sub> nanosheets exceeds 77% within just 1 min, with high selectivity (<i>S</i><sub>U</sub> = 78.7%) and good adsorption capacity of 268.82&#xa0;mg·g<sup>−1</sup>. The phosphate groups have grown on the S defects and taken part in U(VI) extraction through surface complexation, leading to fast, reusable, and highly selective uranium adsorption, showing great potential in emergency treatment of radioactive nuclear wastewater.</p> Graphical Abstract <p></p>

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Ultra-fast uranium adsorption with phosphorylated tungsten disulfide nanosheets via sulfur defects

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Yuan-Ping Jiang,
  • Guo-Hang He,
  • Jin-Cao Chen,
  • Jia-Rui Zhou,
  • Xing-Fang Yu,
  • Long-Xu Wang,
  • Xin Zeng,
  • Jiang-Chen Liu,
  • Jia-Jian Yang,
  • Chong Lin,
  • Xiao-Yu Hao,
  • Zuo-Jia Li,
  • Yun-Xiu Zhang,
  • Zhi-Bin Zhang,
  • Yun-Hai Liu

摘要

Rapid adsorption of radioactive substances is of great significance in emergency situations. A novel approach combining S-defect introduction and in situ phosphorization was employed to synthesize phosphorized WS2 (WS2-PO4) for ultra-efficient uranium extraction. At an initial U (VI) concentration of 50 mg·L−1, the adsorption of U(VI) by WS2-PO4 nanosheets exceeds 77% within just 1 min, with high selectivity (SU = 78.7%) and good adsorption capacity of 268.82 mg·g−1. The phosphate groups have grown on the S defects and taken part in U(VI) extraction through surface complexation, leading to fast, reusable, and highly selective uranium adsorption, showing great potential in emergency treatment of radioactive nuclear wastewater.

Graphical Abstract