Porous Co–C Core–Shell Nanocomposites Derived from Co-MOF-74 with Enhanced Electromagnetic Wave Absorption Performance

• DOI: 10.1021/acsami.8b00965
• Publication Date: 2018-03-13T18:35:30Z
• Authors: Kaifeng Wang; Yujie Chen; Ran Tian; Hua Li; Ying Zhou; Huanan Duan; Hezhou Liu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

The combination of carbon materials and ferrite has recently attracted increased interest in microwave absorption applications. Herein, a novel composite with cobalt cores encapsulated porous shell was synthesized via facile sintering process cobaltic metal-organic framework (Co-MOF-74) as the precursor. Because magnetic loss caused by Co dielectric unique structure, together interfacial polarization between two components, ferromagnetic exhibited enhanced electromagnetic wave performance compared to traditional materials. With thermal decomposition temperature 800 °C, optimal reflection value achieved -62.12 dB at 11.85 GHz thin thickness (2.4 mm), bandwidth ranged from 4.1 18 more than 90% that could be absorbed. illustrates as-prepared Co-C core-shell shows considerable potential an effective absorber.