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Zeolitic imidazolate framework-67 functionalized cellulose hybrid aerogel: an environmentally friendly candidate for dye removal

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Abstract

An eco-friendly, low-cost, and highly efficient adsorbent based on biomass material, cellulose matrix-supported metal-organic-framework (MOF) hybrid aerogel (ZIF-67@CA), was designed and prepared by in situ growth of ZIF-67 nanoparticles on pre-synthesized chemically crosslinked cellulose aerogel. The chemical structure and surface morphology of as-prepared ZIF-67@CA were characterized by various methods. Analysis results confirmed the successful formation of a densely coated layer of ZIF-67 on the surface of the cellulosic aerogel. Owing to its large specific surface area and electrostatic attraction of ZIF-67 with methyl orange (MO), ZIF-67@CA exhibited high adsorption capacity of up to 617 mg g−1 for MO, which was more than four times higher than that of the pristine cellulose aerogel. Additionally, ZIF-67@CA could selectively separate anionic dye from the dye mixture and maintain 90% adsorptivity even after five cycles of repeated usage. Hence, this work provided a feasible solution and scalable platform for the functional design and rational manufacture of MOF-based cellulose aerogel. Moreover, the versatility of its structural design makes it a promising adsorbent material for wide application range of wastewater treatment.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (CN) (No: 21805177, 51673157), the Special Scientific Research Project of Shaanxi Education Department (Nos: 18JK1194, 18JK1204, 18JK0095), the Natural Science Basic Research Plan in Shaanxi Province of China (Nos: 2017JQ2019, 2018JQ2035), the Open Project of Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology (No: XTKF-2019-06) and the Science Research Foundation of Xijing University (No: XJ18T03), Open Project of the National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science and Technology) (No: 2018QGSJ02-18).

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Correspondence to Zongcheng Miao or Liwei Qian.

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Song, W., Zhu, M., Zhu, Y. et al. Zeolitic imidazolate framework-67 functionalized cellulose hybrid aerogel: an environmentally friendly candidate for dye removal. Cellulose 27, 2161–2172 (2020). https://doi.org/10.1007/s10570-019-02883-2

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  • DOI: https://doi.org/10.1007/s10570-019-02883-2

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