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<p>To address the issue of electromagnetic radiation, it was essential to create a thin, lightweight absorber that possesses a broad bandwidth and superior absorption capabilities. In this study, MoS<sub>2</sub>/RGO composites with three-dimensional multilayer flower-like structures were synthesized by hydrothermal method with graphene oxide (GO). Effect of hydrothermal temperature, hydrothermal time and GO introduction on structure and microwave absorption of MoS<sub>2</sub>/RGO composites were investigated. The results indicated that the optimum conditions for hydrothermal growth of MoS<sub>2</sub>/RGO were determined to be hydrothermal temperature of 220 °C and hydrothermal time of 12&#xa0;h. Additionally, the suitable introduction of GO was found to be 40wt%. The synthesized MoS<sub>2</sub>/RGO composites exhibited excellent microwave absorbing property with reflection loss of -50.11&#xa0;dB at 8.96&#xa0;GHz benefiting from its complex flower-like structure. The effective absorption bandwidth was up to 3.62&#xa0;GHz (7.61–11.23&#xa0;GHz), when the filler ratio was only 15 wt%. Potential absorption mechanism was proposed that the cooperation of the interfacial polarization, impedance matching, and dielectric losses was caused by the synergistic effects among RGO and MoS<sub>2</sub>. This work offered an efficacious reference idea for the device of novel and significant wave absorbers.</p>

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Preparation of three-dimensional multilayer flower-like structured MoS2/RGO composites with enhanced microwave absorption

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • Yangfang Cai,
  • Lihui Xu,
  • Hong Pan,
  • Chengjian Yao,
  • Yonghe Li,
  • Lei Hu,
  • Hong Zhao,
  • Qun Yang,
  • Liming Wang,
  • Yong Shen

摘要

To address the issue of electromagnetic radiation, it was essential to create a thin, lightweight absorber that possesses a broad bandwidth and superior absorption capabilities. In this study, MoS2/RGO composites with three-dimensional multilayer flower-like structures were synthesized by hydrothermal method with graphene oxide (GO). Effect of hydrothermal temperature, hydrothermal time and GO introduction on structure and microwave absorption of MoS2/RGO composites were investigated. The results indicated that the optimum conditions for hydrothermal growth of MoS2/RGO were determined to be hydrothermal temperature of 220 °C and hydrothermal time of 12 h. Additionally, the suitable introduction of GO was found to be 40wt%. The synthesized MoS2/RGO composites exhibited excellent microwave absorbing property with reflection loss of -50.11 dB at 8.96 GHz benefiting from its complex flower-like structure. The effective absorption bandwidth was up to 3.62 GHz (7.61–11.23 GHz), when the filler ratio was only 15 wt%. Potential absorption mechanism was proposed that the cooperation of the interfacial polarization, impedance matching, and dielectric losses was caused by the synergistic effects among RGO and MoS2. This work offered an efficacious reference idea for the device of novel and significant wave absorbers.