Rational design of CNTs with encapsulated Co nanospheres as superior acid- and base-resistant microwave absorbers

Liang, C, Yu, Y, Chen, C, Lou, Y, Wang, L, Liu, K, Chen, X, Li, C and Shi, Z 2018, 'Rational design of CNTs with encapsulated Co nanospheres as superior acid- and base-resistant microwave absorbers', Dalton Transactions, vol. 47, no. 33, pp. 11554-11562.


Document type: Journal Article
Collection: Journal Articles

Title Rational design of CNTs with encapsulated Co nanospheres as superior acid- and base-resistant microwave absorbers
Author(s) Liang, C
Yu, Y
Chen, C
Lou, Y
Wang, L
Liu, K
Chen, X
Li, C
Shi, Z
Year 2018
Journal name Dalton Transactions
Volume number 47
Issue number 33
Start page 11554
End page 11562
Total pages 9
Publisher Royal Society of Chemistry
Abstract Carbon nanotubes with encapsulated Co nanospheres (Co@CNTs) were prepared via a simple approach that exhibits promising control over the morphology and size distribution. The individual CNTs interweave with each other and form a three-dimensional network structure. Test results indicate that the presence of polarized interfaces between the Co spheres and CNTs, as well as an excellent impedance match, leads to a superior performance in electromagnetic wave absorption. A maximum reflection loss of -70.8 dB at 6.24 GHz is obtained for a paraffin containing a 30 wt% Co@CNT inclusion. In addition, the effective absorption bandwidth (with a reflection loss below -10 dB) is 12.95-17.7 GHz at a thickness of 1.9 mm, covering most Ku bands. In particular, such Co@CNT structures demonstrate superior and sustainable electromagnetic wave-absorption properties even in contact with concentrated acid or base, owing to their specific encapsulated structure. These findings could provide new guidelines for the preparation and employment of promising microwave absorption materials that can work under harsh environments through a simple and feasible strategy.
Subject Functional Materials
DOI - identifier 10.1039/c8dt02037j
Copyright notice This journal is © The Royal Society of Chemistry 2018
ISSN 1477-9226
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