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

Materials
Xiaodong SunJijun Wang

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.

References

May 8, 2014·Chemical Society Reviews·Paolo FalcaroMark J Styles
Jun 4, 2015·ACS Applied Materials & Interfaces·Yinyun LüLansun Zheng
Mar 8, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Tian TianDavid Fairen-Jimenez
Jul 1, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Yanan ZhangYouwei Du
Oct 19, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Daoran LiGuangbin Ji

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BETA
thermal treatment
X-ray

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