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Assembly of a core–shell MOF with stability into Polyacrylamide hydrogel for boosting extraction of uranium from seawater

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Abstract

Efficient and selective extraction of uranium (U(VI)) from seawater is essential for sustainable nuclear power production. This study reports a novel adsorbent zeolitic imidazolate framework (ZIF)-67@SiO2-A/polyacrylamide (PAM) which was synthesized by grafting the core–shell metal–organic frameworks (MOFs)-based nanostructures coated with the 3-aminopropyl triethoxysilane (APTES) functionalized SiO2 (SiO2-A) onto PAM hydrogel. The SiO2 shell was grown on the surface of MOF, which improved the acid-base resistance of MOF. The introduction of ZIF-67@SiO2-A enhances the specific surface area and adsorption efficiency of the PAM. The ZIF-67@SiO2-A/PAM shows remarkable adsorption capacity, fast adsorption kinetics, and good reusability for uranium. It has excellent adsorption property (6.33 mg·g−1, 30 d) in natural seawater. The X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), energy dispersive spectroscopy (EDS) mappings, and density functional theory reveal that the coordination by N and O in ZIF-67@SiO2-A/PAM with uranium is the main mechanism of uranium adsorption. Thus, ZIF-67@SiO2-A/PAM has great potential to capture uranium from natural seawater.

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Acknowledgements

This work was supported by the National Key R&D Program of China (No. 2019YFA0706802), the National Natural Science Foundation of China (No. 52002356 and U20A20141), China Postdoctoral Science Foundation (No. 2023M731020), and Project for Young Scientists in Basic Research (No. YSBR-039).

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  1. National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450002, China

    Yucheng Song, Huanhuan Tan, Shiliang Qin, Chuntai Liu, Changyu Shen, Peipei Yang & Songwei Li

  2. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China

    Zhong Liu

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  1. Yucheng Song
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Correspondence to Peipei Yang or Songwei Li.

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Assembly of a core–shell MOF with stability into Polyacrylamide hydrogel for boosting extraction of uranium from seawater

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Song, Y., Tan, H., Qin, S. et al. Assembly of a core–shell MOF with stability into Polyacrylamide hydrogel for boosting extraction of uranium from seawater. Nano Res. 17, 3398–3406 (2024). https://doi.org/10.1007/s12274-023-6233-x

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