Abstract
Metal–organic frameworks (MOFs) have been employed in many studies recently because of their stability, porosity, and high surface area. Although zeolitic imidazole frameworks (ZIF-8) have many advantages among MOFs, they have disadvantages such as low activity, conductivity, and reusability depending on the application. To overcome these drawbacks, Fe3O4 and a mixture of Fe3O4 and MnO2 were added into the structure of ZIF-8. The SEM and STEM analysis of the synthesized materials showed that the polyhedral structure of ZIF-8 was hardly affected by the integration of metal oxides into the structure. FTIR and XPS results showed the presence of peaks arising from organic ligands and metal bonds with ZIF-8 in metal oxide/ZIF-8. Addition of Fe3O4 and Fe3O4–MnO2 to structure of ZIF-8 decreased the surface area of ZIF-8 with the formation of mesopores and accumulation of metal oxide particles in pores. When the synthesized metal oxide/ZIF-8 samples were tested in supercapacitor applications, MnO2/ZIF-8 electrode showed the highest specific capacitance. In addition, the presence of metal oxides in the ZIF-8 improved conductivity of the material. Based on the properties of metal oxide/ZIF-8 composites, the materials have also a potential for applications such as gas storage, adsorption, catalysts, and membranes.
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Acknowledgements
Ayten Ateş thanks the Sivas Cumhuriyet University Research Foundation (CUBAP), which provided financial support for this project under Grant Number M-2021-803.
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FK helped in methodology, conceptualization, original draft preparation, and writing, review, and editing. KOO contributed to review and methodology. AA worked in supervision, review, methodology, and editing.
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Kümbetlioğlu, F., Oskay, K.O. & Ateş, A. Preparation and characterization of Fe3O4/ZIF-8 and Fe3O4–MnO2/ZIF-8 composites. J IRAN CHEM SOC 21, 1079–1088 (2024). https://doi.org/10.1007/s13738-024-02978-z
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DOI: https://doi.org/10.1007/s13738-024-02978-z