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<p>Molybdenum disulfide (MoS<sub>2</sub>) has garnered considerable attention in the field of electromagnetic wave absorption (EMWA) materials owing to its distinctive interfacial effects and tunable crystal phases. However, the rational design of doped structures with desirable phase configurations remains challenging. Herein, we report the successful synthesis of carbon-doped 1T/2H MoS<sub>2</sub> nanostructures via a facile one-step hydrothermal method using L-ascorbic acid (L-AA) as the carbon doping source. Our findings demonstrate that the EMWA performance of these nanocomposites can be effectively modulated by varying the concentration of L-AA. Carbon doping not only induces lattice expansion and promotes secondary phase formation but also facilitates the self-assembly of MoS<sub>2</sub>, consequently enhancing the specific surface area. By leveraging the polarization effects stemming from doping-induced lattice defects and the robust interfacial polarization between the 1T and 2H phases, the as-prepared composites exhibited outstanding EMWA capabilities. Remarkably, with an L-AA content of 0.25&#xa0;mmol, the composite achieves a minimum reflection loss (RL<sub>min</sub>) of − 47.7 dB and an effective absorption bandwidth (EAB) of 4.0 GHz at a thickness of 3.0 mm. This study offers a promising strategy for advancing the development of doped transition metal dichalcogenide-based microwave-absorbing materials.</p>

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One-step construction of C doping MoS2 for improved electromagnetic wave absorption performance

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Jinlu Zhu,
  • Yuxi Lei,
  • Sha Zhang

摘要

Molybdenum disulfide (MoS2) has garnered considerable attention in the field of electromagnetic wave absorption (EMWA) materials owing to its distinctive interfacial effects and tunable crystal phases. However, the rational design of doped structures with desirable phase configurations remains challenging. Herein, we report the successful synthesis of carbon-doped 1T/2H MoS2 nanostructures via a facile one-step hydrothermal method using L-ascorbic acid (L-AA) as the carbon doping source. Our findings demonstrate that the EMWA performance of these nanocomposites can be effectively modulated by varying the concentration of L-AA. Carbon doping not only induces lattice expansion and promotes secondary phase formation but also facilitates the self-assembly of MoS2, consequently enhancing the specific surface area. By leveraging the polarization effects stemming from doping-induced lattice defects and the robust interfacial polarization between the 1T and 2H phases, the as-prepared composites exhibited outstanding EMWA capabilities. Remarkably, with an L-AA content of 0.25 mmol, the composite achieves a minimum reflection loss (RLmin) of − 47.7 dB and an effective absorption bandwidth (EAB) of 4.0 GHz at a thickness of 3.0 mm. This study offers a promising strategy for advancing the development of doped transition metal dichalcogenide-based microwave-absorbing materials.