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Facile synthesis of magnetic framework composite MgFe2O4@UiO-66(Zr) and its applications in the adsorption–photocatalytic degradation of tetracycline

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Abstract

Recently, metal–organic framework (MOF)-based hybrid composites have attracted significant attention in photocatalytic applications. In this work, MgFe2O4@UiO-66(Zr) (MFeO@UiO) composites with varying compositions were successfully synthesized via facile in situ assemblies. Depositing the UiO-66(Zr) framework onto ferrite nanoparticles yielded a composite structure having a lower bandgap energy (2.28-2.60 eV) than that of the parent UiO-66(Zr) (~3.8 eV). Moreover, the MFeO@UiO composite exhibited magnetic separation property and improved porosity. The removal experiment for tetracycline (TC) in aqueous media revealed that the MFeO@UiO composite exhibited a high total TC removal efficiency of ca. ~94% within 45-min preadsorption and 120-min visible-light illumination, which is higher than that of pristine ferrite and UiO-66(Zr). The enhanced photodegradation efficiency of MFeO@UiO is attributed to efficient interfacial charge transfer at the heterojunction and the synergistic effect between the semiconductors. Radical scavenging experiments revealed that photogenerated holes (h+) and hydroxyl radicals (·OH) were the major reactive species involved in TC photodegradation. Moreover, the prepared MFeO@UiO nanocomposite showed good recyclability and renewability, making it a potential material for wastewater treatments.

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Acknowledgements

This work was supported by the Basic Science Research Program (NRF-2019R1A2C1090693) and the Engineering Research Center of Excellence Program (NRF-2021R1A5A6002853) through the National Research Foundation (NRF), Ministry of Science and ICT, Republic of Korea.

Funding

This work was supported by the Basic Science Research Program (NRF-2019R1A2C1090693) and the Engineering Research Center of Excellence Program (NRF-2021R1A5A6002853) through the National Research Foundation (NRF), Ministry of Science and ICT, Republic of Korea.

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Vo The Ky: conceptualization, investigation, formal analysis, writing manuscript, and visualization. Jinsoo Kim: resources, funding acquisition, and project administration.

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Correspondence to The Ky Vo or Jinsoo Kim.

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Vo, T.K., Kim, J. Facile synthesis of magnetic framework composite MgFe2O4@UiO-66(Zr) and its applications in the adsorption–photocatalytic degradation of tetracycline. Environ Sci Pollut Res 28, 68261–68275 (2021). https://doi.org/10.1007/s11356-021-15423-y

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  • DOI: https://doi.org/10.1007/s11356-021-15423-y

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