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Title: Preparation and electromagnetic wave absorbing properties of 3D graphene/pine needle-like iron nano-acicular whisker composites
Authors: Zhao, TK
Jin, WB
Ji, XL
Gao, JJ
Xiong, CY
Dang, AL
Li, H 
Li, TH
Shang, SM 
Zhou, ZF
Issue Date: 2017
Source: RSC advances, 2017, v. 7, no. 26, p. 16196-16203
Abstract: The improvement of high reflection loss and broad frequency bandwidth for electromagnetic wave absorption materials is a long-term effort. The superb micro-structures of the absorber have significant impact on increasing reflection loss and broadening frequency bandwidth. Herein, we prepared 3D graphene by chemical vapor deposition and then 3D graphene/pine needle-like iron nano-acicular whisker composites were in situ synthesized by an electrochemical deposition process under an electric field using 3D graphene as substrate. The nano-acicular whiskers show different sizes and the mean diameter of the individual iron nano-acicular whiskers was about 150 nm. The saturation magnetization (MS) of the 3D graphene/iron nano-acicular whisker composite was about 42.65 emu g(-1) and the coercivity (Hc) was 143 Oe, and it shows good magnetic properties. In the frequency range of 2-18 GHz, the reflection loss value of the graphene/iron nano-acicular whisker composites with a thickness of 2 mm could reach -12.81 dB at 10.95 GHz and the effective absorption bandwidth below -10 dB was 2.16 GHz. The nano-acicular whiskers could effectively improve the electromagnetic wave absorbing properties. The results suggested that the as-prepared graphene/iron nano-acicular whisker nanocomposite showed great potential applications as a new absorber material.
Publisher: Royal Society of Chemistry
Journal: RSC advances 
ISSN: 2046-2069
DOI: 10.1039/c7ra00161d
Rights: This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License (https://creativecommons.org/licenses/by-nc/3.0/).
This journal is © The Royal Society of Chemistry 2017
The following publication Tingkai Zhao (Collaborator), Wenbo Jin, Xianglin Ji, Junjie Gao, Chuanyin Xiong, Alei Dang, Hao Li, Tiehu Li, Songmin Shang, Zhongfu Zhou, Preparation and electromagnetic wave absorbing properties of 3D graphene/pine needle-like iron nano-acicular whisker composites, RSC Advances, Volume 7, Issue 26, Pages 16196-16203, 2017 is available at https://dx.doi.org/10.1039/c7ra00161d
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