Soybean meal-derived heteroatom self-doped hierarchical porous carbon for efficient microwave absorption

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-19 DOI:10.1016/j.mseb.2025.118809

Zhihong Wu , Yifan Xu , Jiayi Li , Dan Niu , Wenjing Wang , Zhibin Huang , Jun Qi

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Abstract

The complexity and high cost of preparing high-performance wave-absorbing materials have limited their large-scale production.In this study, N self-doped soybean meal porous carbon(SPC) materials with multilevel pore structures were synthesized from protein-rich waste soybean meal via simple pretreatment, KOH-activation, and high-temperature carbonization.Thanks to balanced impedance matching and conductive losses, as well as the advantages provided by multiple losses from dipole polarization and interfacial polarization induced by nitrogen-containing groups, the prepared material exhibits a minimum reflection loss (RL_min) of −40.97 dB at 9.12 GHz with a low filler loading of 10 wt%, and an effective absorption bandwidth (EAB) of 3.32 GHz at a thickness of 2.80 mm. Simulations of radar cross-section (RCS) demonstrated that SPC outperformed the ideal electrical conductor in minimizing RCS at a scattering angle of 0°, with a notable reduction of 19.01 dB m².This work offers a cost-effective approach for converting biomass waste into efficient porous microwave absorbers.

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豆粕衍生杂原子自掺杂分层多孔碳的高效微波吸收

高性能吸波材料制备的复杂性和高成本限制了其大规模生产。本研究以富含蛋白质的废豆粕为原料，经简单预处理、koh活化、高温炭化，合成了具有多级孔结构的N自掺杂豆粕多孔碳（SPC）材料。由于阻抗匹配和导电损耗的平衡，以及偶极极化和含氮基团引起的界面极化的多重损耗所提供的优势，制备的材料在9.12 GHz时具有最小的反射损耗（RLmin）为−40.97 dB，填充率低至10 wt%，有效吸收带宽（EAB）为3.32 GHz，厚度为2.80 mm。雷达横截面（RCS）仿真结果表明，在散射角为0°时，SPC在减小RCS方面优于理想电导体，显著降低19.01 dB m2。这项工作为将生物质废物转化为高效多孔微波吸收剂提供了一种经济有效的方法。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.