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

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. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

By confinedly implanting WSe2 nanosheets on multi-walled carbon nanotubes, it is possible to obtain WSe2@CNTs nanohybrids with tailored conductive network and polarization. The electromagnetic properties and microwave absorption performance of the nanohybrids can be effectively adjusted by changing the hybrid ratio of WSe2 and CNTs, achieving multi-band microwave absorption.