Abstract
Prussian blue, a member of the metal-organic frameworks (MOFs), has attracted great interest in electromagnetic wave absorption due to its unique properties, such as multiple morphologies and tunable structures. In this paper, La2O3/Co@N-doped carbon nanotubes (La2O3/Co@NCNTs) composites were synthesized by thermal annealing La[Co(CN)6]·5H2O Prussian blue analogue (LaCo-PBA) precursors under an Argon (Ar) atmosphere. The studies of electromagnetic wave absorption show that La2O3/Co@NCNTs demonstrated the minimum reflection loss (RL) of −53.40 dB with the effective absorption bandwidth (EAB) of 4.34 GHz at the thickness of 2.45 mm. These excellent microwave absorption properties are attributed to multiple loss mechanisms, including conduction loss, polarization loss, magnetic resonance loss, and eddy current loss. This study offers a new possibility for the design of multifaceted lightweight carbon-based microwave absorbing materials.
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