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Easily prepared and stable functionalized magnetic ordered mesoporous silica for efficient uranium extraction

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Abstract

Functionalized magnetic Fe3O4@SiO2 composite nanoparticles were prepared by simply embedding iron oxide nanoparticles into MCM-41 through one-step synthesis process, followed by aminopropyls grafting on the mesopore channels, aiming to efficiently and conveniently uptake U(VI) from aqueous solution. The resultant material possesses highly ordered mesoporous structure with large surface area, uniform pore size, excellent thermal stability, quick magnetic response, and desirable acids resistance, confirmed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), N2 adsorption/ desorption experiments, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). Detailed U(VI) sorption test indicated that this material is indeed an effective U(VI) sorbent with fast sorption kinetics of less than 2 h, large sorption capacity of 160 mg/g at pH 5.0±0.1, and desirable selectivity towards U(VI) ions over a range of competing metal ions. The absorbed U(VI) can be easily desorbed by 0.01 mol/L or more concentrated HNO3 solution, and the reclaimed sorbent can be reused with no obvious decrease of sorption capacity even after 4 sorption-desorption cycles. The present results suggest the vast opportunities of this kind of magnetic composite on the solid-phase extraction of U(VI).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China

    Wenlu Guo, Changming Nie & Lin Zhu

  2. Laboratory of Nuclear Energy Chemistry, Chinese Academy of Sciences, Beijing, 100049, China

    Wenlu Guo, Lin Wang, Zijie Li, Lin Zhu, Liuzheng Zhu, Weiqun Shi & Liyong Yuan

  3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Wenlu Guo, Lin Wang, Zijie Li, Lin Zhu, Liuzheng Zhu, Weiqun Shi & Liyong Yuan

  4. State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China

    Zhentai Zhu

Authors
  1. Wenlu Guo
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  2. Changming Nie
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  3. Lin Wang
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  4. Zijie Li
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  5. Lin Zhu
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  6. Liuzheng Zhu
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  7. Zhentai Zhu
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  8. Weiqun Shi
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  9. Liyong Yuan
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Correspondence to Changming Nie or Liyong Yuan.

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Guo, W., Nie, C., Wang, L. et al. Easily prepared and stable functionalized magnetic ordered mesoporous silica for efficient uranium extraction. Sci. China Chem. 59, 629–636 (2016). https://doi.org/10.1007/s11426-016-5561-8

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  • DOI: https://doi.org/10.1007/s11426-016-5561-8

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