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Cited by 517

The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.

Enhanced Microwave Absorption Performance of Coated Carbon Nanotubes by Optimizing the Fe3O4 Nanocoating Structure

Li, Na, Huang, Gui-Wen, Li, Yuan-Qing, Xiao, Hong-Mei, Feng, Qing-Ping, Hu, Ning, Fu, Shao-Yun·2017·ACS Applied Materials & Interfaces

Abstract

It is well accepted that the microwave absorption performance (MAP) of carbon nanotubes (CNTs) can be enhanced via coating magnetic nanoparticles on their surfaces. However, it is still unclear if the magnetic coating structure has a significant influence on the microwave absorption behavior. In this work, nano-Fe 3 O 4 compact-coated CNTs (FCCs) and Fe 3 O 4 loose-coated CNTs (FLCs) are prepared using a simple solvothermal method. The MAP of the Fe 3 O 4 -coated CNTs is shown to be adjustable via controlling the Fe 3 O 4 nanocoating structure. The results reveal that the overall MAP of coated CNTs strongly depends on the magnetic coating structure. In addition, the FCCs show a much better MAP than the FLCs. It is shown that the microwave absorption difference between the FLCs and FCCs is due to the disparate complementarities between the dielectric loss and the magnetic loss, which are related to the coverage density of Fe 3 O 4 nanoparticles on the surfaces of CNTs. For FCCs, the mass ratio of CNTs to Fe 3+ is then optimized to maximize the effective complementarities between the dielectric loss and the magnetic loss. Finally, a comparison is made with the literature on Fe 3 O 4 -carbon-based composites. The FCCs at the optimized CNT to Fe 3+ ratio in the present work show the most effective specific RL min (28.7 dB·mm –1 ) and the widest effective bandwidth (RL < −10 dB) (8.3 GHz). The excellent MAP of the as-prepared FCC sample is demonstrated to result from the consequent dielectric relaxation process and the improved magnetic loss. Consequently, the structure–property relationship revealed is significant for the design and preparation of CNT-based materials with effective microwave absorption.

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Metadata

Authors
Li, N., Huang, G.-W., Li, Y.-Q., Xiao, H.-M., Feng, Q.-P., Hu, N., & Fu, S.-Y.
Venue
ACS Applied Materials & Interfaces
Published
2017-01-09
Volume
9
Issue
3
Pages
2973-2983
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2564629506
Cited by
517
References
24
FWCI
17.79
Type
journal article
Language
en
Open access
closed

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