Implantation of WSe2 nanosheets into multi-walled carbon nanotubes for enhanced microwave absorption

Yuhang Han; Jie Yuan; Yuhang Zhu; Qiangqiang Wang; Lin Li; Maosheng Cao

doi:10.1016/j.jcis.2021.11.079

Implantation of WSe₂ nanosheets into multi-walled carbon nanotubes for enhanced microwave absorption

J Colloid Interface Sci. 2022 Mar:609:746-754. doi: 10.1016/j.jcis.2021.11.079. Epub 2021 Nov 18.

Authors

Yuhang Han¹, Jie Yuan², Yuhang Zhu³, Qiangqiang Wang³, Lin Li⁴, Maosheng Cao⁵

Affiliations

¹ Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics & Electronic Engineering, Harbin Normal University, Harbin 150025, China.
² School of Information Engineering, Minzu University of China, Beijing 100081, China.
³ School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
⁴ Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics & Electronic Engineering, Harbin Normal University, Harbin 150025, China. Electronic address: physics_lin@hotmail.com.
⁵ School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: caomaosheng@bit.edu.cn.

PMID: 34839924
DOI: 10.1016/j.jcis.2021.11.079

Abstract

Microwave absorption materials can protect humanity from harmful electromagnetic radiation, but it is still a challenge to absorb electromagnetic radiation with different bands simultaneously. Herein, an effective strategy for obtaining WSe₂@CNTs nanohybrids is reported. The conductive network and polarization of WSe₂@CNTs nanohybrids can be tailored by confinedly implanting WSe₂ nanosheets on multi-walled carbon nanotubes. The electromagnetic properties and microwave absorption performance of the nanohybrids are effectively adjusted via changing the hybrid ratio of WSe₂ and CNTs. Multi-band microwave absorption is achieved with up to three bands. The reflection loss (RL) of the sample can reach -60.1 dB, and the bandwidth can reach 4.24 GHz (RL ≤ -10 dB). The excellent microwave absorption performance is attributed to the conductance and multiple relaxations, as well as the synergistic effect of the two. This result confirms that WSe₂@CNTs nanohybrids are potential candidates for high-efficiency microwave absorbers and provide a valuable pathway for designing high-performance microwave absorption materials in the future.

Keywords: Carbon nanotube; Multi-band microwave absorption; Permittivity; WSe(2) nanosheet; WSe(2)@CNTs nanohybrids.

MeSH terms

Electric Conductivity
Microwaves*
Nanotubes, Carbon*

Substances

Nanotubes, Carbon