Insight into Morphology-Sensitive Microwave Absorption Properties of Biocarbon/MnFe₂O₄ Composites

Among an extensive range of materials, biocarbon has acquired considerable interest because of its superiority of wide absorption bandwidth, strong absorption, accessibility, cost-effective and eco-friendly. Here, the inherited morphology of the biocarbon has been utilized to tune the performance of the microwave absorber. Biocarbon (wheat straw & peanut shells) and industrial waste (MnFe 2 O 4 ) have been used to fabricate microwave absorption composites. Biocarbon wastes with two different morphologies, sheetlike and distorted, have been used to prepare the composites. Composite with sheetlike morphology attained the minimum reflection loss (RL mini ) of [Formula: see text]19[Formula: see text]dB but, on the other hand, composite with distorted morphology achieved RL mini of [Formula: see text]43[Formula: see text]dB, as well as, it is the effective absorption bandwidth (EAB) covers the whole X-band. Our findings reveal that microwave absorption performance of the absorbers strongly relies on the anisotropic morphology of the biocarbon. It is expected that composites with anisotropic morphology of the biocarbon may be utilized to modify microwave absorption performance for practical applications.

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