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ZIF-8 prepared in ionic liquid microemulsions for efficient capture of phosphate from water

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Abstract

A high-efficiency adsorbent ZIF-8 was successfully prepared in a microemulsion system provided by an ionic liquid, which showed excellent potential for removing phosphate from water. The properties of the adsorbents were determined by several characterization methods, such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and Brunauere-Emmette-Teller (BET) et al. The results confirmed that ZIF-8 prepared in the ionic liquid microemulsion (ZIF-8-ILM) has a smaller particle size compared with that prepared in an aqueous solution. Moreover, the ZIF-8-ILM holds a high BET specific surface area and pore volume, as well as the textural meso- and macro-porosities formed by inter-particle voids. Based on these traits, the ZIF-8-ILM exhibit excellent adsorption capacity for phosphate, as evidenced by a maximum adsorption capacity of 178.99 mg/g was obtained. In addition, the capture of phosphate on ZIF-8-ILM was quite quickly and reached equilibrium within 60 min.

Graphical abstract

A high-efficiency adsorbent ZIF-8 was successfully prepared in a microemulsion system provided by an ionic liquid. The ZIF-8 materials prepared not only had high BET specific surface area and pore volume but also exhibited hierarchical pore structure, which showed excellent potential for removing phosphate from water.

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Acknowledgements

This research was supported by the Talents Introduction Foundation of Nanjing Institute of Technology (No. YKJ202032 and YKJ201936). This research was also supported by the Research Fund Program of Guangdong Provincial Key Lab of Green Chemical Product Technology (No. GC202106) and the Dean/Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (No. 2021K008). The authors would also gratefully acknowledge the support from the Natural Science Research Projects of Universities in Jiangsu Province (No. 20KJB530005) and the Science Foundation of Nanjing Institute of Technology (No. CXY201926).

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Authors and Affiliations

  1. School of Environmental Engineering, Nanjing Institute of Technology, Nanjing, 211167, China

    Lihua Hu, Chen Chen, Xiao Wang, Kairan Hu, Zhihao Xu & Wei Xu

  2. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, 530004, China

    Lihua Hu

  3. Guangdong Provincial Key Lab of Green Chemical Product Technology, Guangzhou, 510640, China

    Lihua Hu

  4. Energy Research Institute, Nanjing Institute of Technology, Nanjing, 211167, China

    Wei Xu

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  1. Lihua Hu
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Correspondence to Wei Xu.

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Hu, L., Chen, C., Wang, X. et al. ZIF-8 prepared in ionic liquid microemulsions for efficient capture of phosphate from water. J Chem Sci 134, 62 (2022). https://doi.org/10.1007/s12039-022-02058-w

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