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Open AccessArticle

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.
Materials 2018, 11(5), 781; https://doi.org/10.3390/ma11050781
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)
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/[email protected]) has been successfully prepared by a self-assembled polymerization method. With a filler loading ratio of 10 wt %, the composite of Co/[email protected] 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/[email protected] 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/[email protected]—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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MDPI and ACS Style

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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