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Synthesis of a Magnetic Co@C Material via the Design of a MOF Precursor for Efficient and Selective Adsorption of Water Pollutants

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Abstract

3D metal–organic frameworks (MOFs) can be appropriate templates for the fabrication of nanomaterials due to they have active sites exposed on the channel or surface, which thus provide them with improved catalytic performance. In this study, a 3D cobalt-based MOF [Co(H2bpta)]n (Co-MOF), where H4bpta denotes 2,2′,4,4′-biphenyltetracarboxylic acid, has been constructed with the use of a ligand with a high carbon content. On this basis, a 2D magnetic carbon-coated cobalt nanoparticle composite (Co@C) was prepared by using the title MOF under different temperatures. Magnetic Co@C can readily absorb dye from the solution and can thus act as an inexpensive and fast-acting adsorbent. Moreover, we have explored the adsorption isotherms, kinetics and thermodynamics of the anion dyes in detail. The adsorption capacity of the Co@C-800 for investigated methyl orange (MO) and congo red (CR) dyes were 773.48 and 495.66 mg g−1, respectively. It is noteworthy that MO adsorption is higher in existing materials. Thermodynamic studies suggest that the adsorption processes are spontaneous and exothermic. This study opens a new insight into the synthesis and application of carbon-based materials that enable the selective removal of organic dyes.

Graphical Abstract

A Co-MOF has been solvothermal synthesized and structurally characterized, which was used as a combined catalyst and carbon source for the synthesis of magnetic Co@C. Interestingly, the as-grown Co@C-800 exhibits high-performance selective adsorption of anionic dyes (MO and CR) with high adsorption capacities.

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Acknowledgements

This work was financially supported by the Liaoning Provincial Department of Education Fund (LQ2019004 and LZ2019005).

Funding

The funder was funded by Department of Education of Liaoning Province, Grant Nos (LQ2019004) and (LZ2019005).

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Authors and Affiliations

  1. College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, People’s Republic of China

    Yu Liu, Yan Wang, Xiao-Sa Zhang, Wen-Ze Li & Ai-Ai Yang

  2. College of Sciences, Northeastern University, Shenyang, 100819, People’s Republic of China

    Jian Luan

  3. Post-Doctoral Research Station of Dalian Zhenbang, Fluorocarbon Paint Stock Co., Ltd., Dalian, 116036, People’s Republic of China

    Hong-Zhu Liu

  4. State Key Laboratory of Fine Chemicals, Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    Zhong-Gang Wang

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YL and YW—Crystal synthesis, writing-original draft preparation. XSZ and AAY–formal analysis, investigation; HZL and ZGW—Software; WZL and JL—Writing-review and editing.

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Liu, Y., Wang, Y., Zhang, XS. et al. Synthesis of a Magnetic Co@C Material via the Design of a MOF Precursor for Efficient and Selective Adsorption of Water Pollutants. J Inorg Organomet Polym 32, 700–712 (2022). https://doi.org/10.1007/s10904-021-02157-0

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