Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption

作者：Sun, Xiaodong; Lv, Xuliang; Sui, Mingxu; Weng, Xiaodi; Li, Xiaopeng^*; Wang, Jijun^*

来源：Materials, 2018, 11(5): 781.

DOI：10.3390/ma11050781

• zeolite imidazole framework
• electromagnetic absorption
• interfacial polarization
• heterostructure

To clear away the harmful effects of the increment of electromagnetic pollution, high performance absorbers with appropriate impedance matching and strong attenuation capacity are strongly desired. In this study, a chain-like PPy aerogel decorated with MOF-derived nanoporous Co/C (Co/C@PPy) has been successfully prepared by a self-assembled polymerization method. With a filler loading ratio of 10 wt %, the composite of Co/C@PPy could achieve a promising electromagnetic absorption performance both in intensity and bandwidth. An optimal reflection loss value of -44.76 dB is achieved, and the effective bandwidth (reflection loss lower than -10 dB) is as large as 6.56 GHz. Furthermore, a composite only loaded with 5 wt % Co/C@PPy also achieves an effective bandwidth of 5.20 GHz, which is even better than numerous reported electromagnetic absorption (EA) materials. The result reveals that the as-fabricated Co/C@PPy-with high absorption intensity, broad bandwidth, and light weight properties-can be utilized as a competitive absorber.

• 出版日期2018-5
• 单位中国人民解放军国防科学技术大学