Hollow Ni/C microspheres derived from Ni-metal organic framework for electromagnetic wave absorption

By Y. Qiu, Ying Lin, Haibo Yang, L. Wang, Mengqi Wang, Bo Wen. 2020

478 citations recorded by the source corpus.

Abstract Hollow nickel/carbon (Ni/C) microsphere was synthesized by in situ pyrolysis of the Ni-based trimellitic acid framework (Ni-MOF) at argon atmosphere. The morphology of Ni-MOF precursor can be easily controlled by adjusting the volume ratio of DMF and H2O in solvothermal process. When the volume ratio of DMF: H2O is 2: 1, hollow Ni-MOF microspheres can be obtained and the corresponding Ni/C composite exhibits extremely strong electromagnetic wave absorption. The maximum reflection loss is up to −57.25 dB with the matching thickness of only 1.8 mm, while the corresponding effective absorption bandwidth (reflection loss below −10 dB) achieves 5.1 GHz. The excellent electromagnetic wave absorbing capabilities is related to the hollow structure and the synergistic effect between carbon and nickel nanoparticles. This work confirms that the as-prepared Ni/C composite with superior electromagnetic wave absorption properties is a promising candidate for lightweight electromagnetic wave absorbing materials.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/dc93d05e71816f5a165edb6dd0e8f948ca802d75