In-situ anchoring of Fe3O4/ZIF-67 dodecahedrons in highly compressible wood aerogel with excellent microwave absorption properties

By Lulu Xu, Ye Xiong, Baokang Dang, Zhangning Ye, Chunde Jin, Qingfeng Sun, Xiaohong Yu. Materials & Design (1980-2015), 2019

139 citations recorded by the source corpus.

Abstract Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe3O4/ZIF-67 (Fe3O4/ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe3O4/ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe3O4/ZIF-67 particles, Fe3O4/ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm3 g−1. Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe3O4/ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/45ffc562459a8841ee3f0d3b84156f695d747fc8