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Materials 2018, 11(5), 781; https://doi.org/10.3390/ma11050781

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

1
Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-Optical Engineering, The Army Engineering University of PLA, Nanjing 210007, China
2
PLA Rocket Force Research Institute, Beijing 100011, China
3
School of Information and Communications, National University of Defense Technology, Xi’an 710106, China
4
Research Institute for National Defense Engineering of Academy of Military Science PLA China, Beijing 100036, China
*
Authors to whom correspondence should be addressed.
Received: 12 April 2018 / Revised: 7 May 2018 / Accepted: 9 May 2018 / Published: 11 May 2018
(This article belongs to the Special Issue Carbon Based Functional Microwave Shields)
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Abstract

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. View Full-Text
Keywords: zeolite imidazole framework; electromagnetic absorption; interfacial polarization; heterostructure zeolite imidazole framework; electromagnetic absorption; interfacial polarization; heterostructure
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Sun, X.; Lv, X.; Sui, M.; Weng, X.; Li, X.; Wang, J. Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption. Materials 2018, 11, 781.

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