The regulation of the interfacial electric field plays a pivotal role in magnifying the electromagnetic energy attenuation capability during the design and synthesis of efficient and tunable absorbers for electromagnetic waves (EMW). Herein, a rational and universally applicable two-step hydrothermal method strategy was proposed to effectively control the electronic structure of Mott-Schottky EMW absorbing materials derived from Co-MOF. The as-synthesized Co₃S₄@MoS₂/NC ensures efficient electron transfer, while the change redistribution leads to the emergence of additional electric dipoles under an external EMM field. In addition, the hierarchical Co₃S₄@MoS₂/NC nano-architecture with a hierarchical arrangement in 2D and 3D offers more polarization sites, thereby extending the path for EMW transmission through multiple reflections and scattering. The potential to enhance the EMW absorption performance of Co₃S₄@MoS₂/NC lies in its unique microstructure and substantial surface area, which optimize impedance matching properties through a synergistic effect of dipole and interfacial polarization induced by Mott-Schottky heterointerfaces. As anticipated, the Co₃S₄@MoS₂/NC exhibits a maximum EMW absorption capacity with an RL_min value of -41.97 dB and a broad EAB of 4.24 GHz at a thickness of 2.0 mm. This study provides insights for designing highly efficient Mott-Schottky EMW absorbing materials at the molecular level rationally.

中文翻译：

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通过多级纳米结构通过操纵 Mott-Schottky 异质结构中的界面电荷重新分布来增强多重损耗以增强电磁吸收


在设计和合成高效、可调谐的电磁波吸收器 （EMW） 的过程中，界面电场的调节在放大电磁能量衰减能力方面起着关键作用。本文提出了一种合理且普遍适用的两步水热法策略，以有效控制 Co-MOF 衍生的 Mott-Schottky EMW 吸收材料的电子结构。合成的 Co₃S₄@MoS₂/NC 确保了高效的电子转移，而变化的再分布导致在外部 EMM 场下出现额外的电偶极子。此外，具有 2D 和 3D 分层排列的分层 Co₃S₄@MoS₂/NC 纳米架构提供了更多的偏振位点，从而通过多次反射和散射扩展了 EMW 传输的路径。增强 Co₃S₄@MoS₂/NC 的 EMW 吸收性能的潜力在于其独特的微观结构和较大的表面积，它们通过莫特-肖特基异质界面诱导的偶极子和界面极化的协同效应优化了阻抗匹配性能。正如预期的那样，Co₃S₄@MoS₂/NC 表现出最大的 EMW 吸收能力，RL_最小值为 -41.97 dB，在 2.0 mm 的厚度下具有 4.24 GHz 的宽 EAB。本研究为在分子水平上合理设计高效的 Mott-Schottky EMW 吸收材料提供了见解。