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Metal-organic framework (MOF) derived porous NiCo2O4 and ZnCo2O4 spinels with high microwave absorption performance for environmentally friendly EMI shielding applications

Heidari, P ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2022.10.291
  3. Publisher: Elsevier Ltd , 2023
  4. Abstract:
  5. Sheet-like NiCo2O4 and ZnCo2O4 spinels were prepared by metal-organic framework (MOF) as sacrificial template to derive into porous microwave absorber materials. The NiCo and ZnCo MOFs obtained by using 2-methylimidazole linker were decomposed to the sheet-like NiCo2O4 and ZnCo2O4 powders, respectively, with the similar specific surface area of 75 m2/g and the pore volume of 0.31 cm3/g. However, the NiCo2O4 and ZnCo2O4 absorbers had the distinct microwave absorption performance on account of their various physicochemical properties caused by the nature of Ni and Zn elements. From the practical viewpoint, the MOF-derived NiCo2O4 sample had the broader effective absorption bandwidth (>3 GHz) at smaller thicknesses (<3 mm) in the Ku and X bands, whereas a significant fraction of C2, C1, and S bands could be absorbed by the MOF-derived ZnCo2O4 sample. © 2022 Elsevier Ltd and Techna Group S.r.l
  6. Keywords:
  7. Metal-organic framework (MOF) ; Microwave absorption properties ; NiCo2O4 ; ZnCo2O4
  8. Source: Ceramics International ; Volume 49, Issue 4 , 2023 , Pages 6678-6687 ; 02728842 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0272884222039013