Construction of embedded heterostructures in biomass-derived carbon frameworks for enhancing electromagnetic wave absorption

To improve multiple heterointerface coupling efficiencies and efficiently engineer the pore structure of porous carbon, a kind of magnetic cobalt nanoparticles embedded porous carbon framework, derived from economical biomass, was designed in the present study. The resulting magnetic embedded porous carbon framework showed exceptional dielectric responses and a significant polarization effect because of the higher contact surface utilization than the ordinary loaded structure. The effective absorbing bandwidth covers 6.6 GHz with a thickness of 2.3 mm, indicating its capacity to address the increasingly problematic electromagnetic (EM) pollution issue. Meanwhile, the magnetic embedded structure with the carbon framework could protect the embedded particles from common corrosion issues, even after a long time environmental adaptability assessment in the lab and faintly acid condition. This work highlights a potential strategy for the design and synthesis of high-performance carbonaceous EM absorbers. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

In this study, a magnetic cobalt nanoparticles embedded porous carbon framework derived from economical biomass was designed. The material showed exceptional dielectric responses and polarization effects, and it had the capacity to absorb electromagnetic waves in the 6.6 GHz frequency range, addressing the issue of electromagnetic pollution. The carbon framework also provided protection against corrosion for the embedded particles.