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. 2022 Dec 21;28(1):39.
doi: 10.3390/molecules28010039.

Magnetic Nanocomposites of Coated Ferrites/MOF as Pesticide Adsorbents

Savvina Lazarou  1 , Orestis Antonoglou  1 , Stefanos Mourdikoudis  2 , Marco Serra  2 , Zdeněk Sofer  2 , Catherine Dendrinou-Samara  1
Affiliations

Magnetic Nanocomposites of Coated Ferrites/MOF as Pesticide Adsorbents

Savvina Lazarou et al. Molecules. .

Abstract

Magnetic metal-organic frameworks (MMOFs) are gaining increased attention as emerging adsorbents/water remediation agents. Herein, a facile development of novel MMOFs comprised of coated ferrite nanoparticles (MNPs) and UiO-66 metal-organic framework is reported. In specific, coated Co- and Zn-doped ferrite magnetic nanoparticles were synthesized as building block while the metal-organic framework was grown in the presence of MNPs via a semi-self-assembly approach. The utilization of coated MNPs facilitated the conjugation and stands as a novel strategy for fabricating MMOFs with increased stability and an explicit structure. MMOFs were isolated with 13-25 nm crystallites sizes, 244-332 m2/g specific surface area (SSA) and 22-42 emu/g saturation magnetization values. Establishing the UiO-66 framework via the reported semi-self-assembly resulted in roughly 70% reduction in both magnetic properties and SSA, compared with the initial MNPs building blocks and UiO-66 framework, respectively. Nonetheless, the remaining 30% of the magnetization and SSA was adequate for successful and sufficient adsorption of two different pesticides, 2,4-Dichlorophenoxyacetic acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T), while the recovery with a commercial magnet and reuse were also found to be effective. Adsorption and kinetic studies for all three MMOFs and both pesticides were performed, and data were fitted to Langmuir-Freundlich isotherm models.

Keywords: UiO-66; magnetic metal–organic frameworks; magnetic nanomaterials; nanoadsorbents; pesticides; water remediation.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
(A) SEM image; (B) XRD measurement; (C) FTIR spectrum; and (D) TGA of CF MMOF.
Figure 2
Figure 2
Additional, higher resolution SEM images for the sample CF MMOF.
Figure 3
Figure 3
(A) SEM image; (B) XRD measurement; (C) FTIR spectrum; and (D) TGA of ZF(acac) MMOF.
Figure 4
Figure 4
Additional, higher resolution SEM image for the sample ZF(acac) MMOF.
Figure 5
Figure 5
(A) SEM image; (B) XRD measurement; (C) FTIR spectrum; and (D) TGA of ZF(Cl) MMOF.
Figure 6
Figure 6
Additional, higher resolution SEM image for the sample ZF (Cl) MMOF.
Figure 7
Figure 7
VSM hysteresis loops for: (A) CF MMOF; (B) ZF(acac) MMOF; and (C) ZF(Cl) MMOF.
Figure 8
Figure 8
N2 Absorption isotherms for UiO-66, CF MMOF, ZF(acac) MMOF and ZF(Cl) MMOF.
Figure 9
Figure 9
Qmax values for CF MMOF, ZF(acac) MMOF and ZF(Cl) MMOF for 2,4-D and 2,4,5-T pesticides.
Figure 10
Figure 10
UV-Vis spectra after 24 h of adsorption period for all three washed and dried MMOFs, in comparison with the 2,4-D starting solution curve.
See this image and copyright information in PMC

References

    1. Knežević N.Ž., Gadjanski I., Durand J.-O. Magnetic nanoarchitectures for cancer sensing, imaging and therapy. J. Mater. Chem. B. 2018;7:9–23. doi: 10.1039/C8TB02741B. - DOI - PubMed
    1. Idumah C.I. Novel Trends in Magnetic Polymeric Nanoarchitectures. Polym. Technol. Mater. 2021;60:830–848. doi: 10.1080/25740881.2020.1869780. - DOI
    1. Sezer N., Arı I., Biçer Y., Koç M. Superparamagnetic nanoarchitectures: Multimodal functionalities and applications. J. Magn. Magn. Mater. 2021;538:168300. doi: 10.1016/j.jmmm.2021.168300. - DOI
    1. Mourdikoudis S., Kostopoulou A., LaGrow A.P. Magnetic Nanoparticle Composites: Synergistic Effects and Applications. Adv. Sci. 2021;8:2004951. doi: 10.1002/advs.202004951. - DOI - PMC - PubMed
    1. Quintas P.Y., Fiorentini E.F., Oviedo M.N., Escudero L.B. Magnetic biosorbents and their applications in water re-mediation. In: Meili L., Dotto G.L., editors. Advanced Magnetic Adsorbents for Water Treatment. Environmental Chemistry for a Sustainable World. Springer; Cham, Switzerland: 2021. pp. 59–104.

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