Hierarchical Carbon Network Composites Derived from ZIF-8 for High-Efficiency Microwave Absorption

Zhongyi Luo; Zhaohao Wang; Jinshuai Liu; Huihui Jin; Chunhua Han; Xuanpeng Wang

doi:10.3390/ma16093380

Hierarchical Carbon Network Composites Derived from ZIF-8 for High-Efficiency Microwave Absorption

Materials (Basel). 2023 Apr 26;16(9):3380. doi: 10.3390/ma16093380.

Authors

Zhongyi Luo¹, Zhaohao Wang², Jinshuai Liu^{3

4}, Huihui Jin¹, Chunhua Han^{3

4

5}, Xuanpeng Wang^{1

4

5}

Affiliations

¹ Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan 430070, China.
² School of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, China.
³ School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
⁴ Hainan Institute, Wuhan University of Technology, Sanya 572000, China.
⁵ Hubei Longzhong Laboratory, Wuhan University of Technology (Xiangyang Demonstration Zone), Xiangyang 441000, China.

Abstract

Metal-organic framework (MOF)-derived composites have gained wide attention due to their specific structures and enhanced performance. In this work, we prepared carbon nanotubes with Fe nanoparticles connected to two-dimensional (2D) hierarchical carbon network composites via a low-pressure gas-solid reaction strategy. Specifically, the three-dimensional (3D) networks derived from ZIF-8 exploited the carbon nanotubes with the function of charge modulation. Meanwhile, we utilized the interconnected 2D nanostructures to optimize impedance matching and facilitate multiple scattering, ultimately improving the overall microwave absorption performance. Furthermore, based on the well-designed structures, the composites prepared at 800 °C (Fe-N-C@CNTs-800) achieved the best reflection loss (RL) of -58.5 dB, thereby obtaining superior microwave absorption performance. Overall, this study provides a good groundwork for further investigation into the modification and dimension design of novel hierarchical microwave absorbers.

Keywords: ZIF-8; carbon networks; metal–organic framework; microwave absorption performance.

Grants and funding

This work was supported by the Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City (520LH055, 2021CXLH0007) and the Sanya Science and Education Innovation Park of Wuhan University of Technology (2021KF0016, 2021KF0019).