Urchin-like Amorphous Nitrogen-Doped Carbon Nanotubes Encapsulated with Transition-Metal-Alloy@Graphene Core@Shell Nanoparticles for Microwave Energy Attenuation

• DOI: 10.1021/acsami.9b20412
• Publication Date: 2020-02-05T10:47:45Z
• Authors: Dong Guo; Haoran Yuan; Xianchao Wang; Chunling Zhu; Yujin Chen
• Keywords: Amorphous carbon

Herein, we report three-dimensional (3D) urchin-like amorphous nitrogen-doped CNT (NCNT) arrays with embedded cobalt-nickel@graphene core@shell nanoparticles (NPs) in the inner parts of NCNTs (CoNi@G@NCNTs) for highly efficient absorption toward microwave (MW). The CoNi NPs are covered about seven layers graphene shell, resulting formation CoNi@G core-shell structures. In meanwhile, further encapsulated within NCNTs. Benefitting from multiple scattering unique 3D structure MW, cooperative effect between magnetic loss and dielectric loss, additional interfacial polarizations, CoNi@G@NCNTs exhibit excellent MW energy attenuation ability a broad bandwidth 5.2 GHz matching thickness merely 1.7 mm, outperforming most reported absorbers. Furthermore, chemical stability is improved greatly due to presence coating outmost NCNTs, facilitating their practical applications. Our results highlight novel strategy fabrication nanostructures as high-performance MW-absorbing materials.