中国物理B ›› 2021, Vol. 30 ›› Issue (6): 67804-067804.doi: 10.1088/1674-1056/abd770

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Enhanced microwave absorption performance of MOF-derived hollow Zn-Co/C anchored on reduced graphene oxide

Yue Wang(王玥), Dawei He(何大伟), and Yongsheng Wang(王永生)   

  1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2020-12-08 修回日期:2020-12-23 接受日期:2020-12-30 出版日期:2021-05-18 发布日期:2021-06-05
  • 通讯作者: Dawei He E-mail:dwhe@bjtu.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2016YFA0202302), the National Natural Science Foundation of China (Grant Nos. 61527817, 61875236, 61905010, and 61975007), and Beijing Natural Science Foundation, China (Grant No. Z190006).

Enhanced microwave absorption performance of MOF-derived hollow Zn-Co/C anchored on reduced graphene oxide

Yue Wang(王玥), Dawei He(何大伟), and Yongsheng Wang(王永生)   

  1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
  • Received:2020-12-08 Revised:2020-12-23 Accepted:2020-12-30 Online:2021-05-18 Published:2021-06-05
  • Contact: Dawei He E-mail:dwhe@bjtu.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2016YFA0202302), the National Natural Science Foundation of China (Grant Nos. 61527817, 61875236, 61905010, and 61975007), and Beijing Natural Science Foundation, China (Grant No. Z190006).

摘要: Composite materials assembled by metal/carbon nanoparticles and 2D layered flakes can provide abundant interfaces, which are beneficial for high-performance microwave absorbers. Herein, Zn-Co/C/RGO composites, composed of Zn-Co metal-organic framework-derived Zn-Co/C nanoparticles and reduced graphene oxide (RGO), were obtained through a facile method. The multilayer structure was due to the introduction of hollow Zn-Co/C nanoparticles in the RGO sheets. Zn-Co/C nanoparticles provided abundant polarization and dipole centers on the RGO surface, which enhanced the microwave absorption abilities. Different concentrations of RGO were introduced to optimize impedance matching. The minimum reflection loss (RL) of Zn-Co/C/RGO with a thickness of 1.5 mm reached -32.56 dB with the bandwidth corresponding to RL at -10 dB, which can reach 3.92 GHz, while a minimum RL of -47.15 dB at 11.2 GHz was also obtained at a thickness of 2.0 mm. The electromagnetic data demonstrate that Zn-Co/C/RGO presented excellent absorption performance and has potential for application in the microwave absorption field.

关键词: microwave absorption, metal nanoparticles, metal-organic framework (MOF), reduced graphene oxide

Abstract: Composite materials assembled by metal/carbon nanoparticles and 2D layered flakes can provide abundant interfaces, which are beneficial for high-performance microwave absorbers. Herein, Zn-Co/C/RGO composites, composed of Zn-Co metal-organic framework-derived Zn-Co/C nanoparticles and reduced graphene oxide (RGO), were obtained through a facile method. The multilayer structure was due to the introduction of hollow Zn-Co/C nanoparticles in the RGO sheets. Zn-Co/C nanoparticles provided abundant polarization and dipole centers on the RGO surface, which enhanced the microwave absorption abilities. Different concentrations of RGO were introduced to optimize impedance matching. The minimum reflection loss (RL) of Zn-Co/C/RGO with a thickness of 1.5 mm reached -32.56 dB with the bandwidth corresponding to RL at -10 dB, which can reach 3.92 GHz, while a minimum RL of -47.15 dB at 11.2 GHz was also obtained at a thickness of 2.0 mm. The electromagnetic data demonstrate that Zn-Co/C/RGO presented excellent absorption performance and has potential for application in the microwave absorption field.

Key words: microwave absorption, metal nanoparticles, metal-organic framework (MOF), reduced graphene oxide

中图分类号:  (Organic compounds, polymers)

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