TY - JOUR
T1 - Core-shell structured Fe/Fe3O4@TCNFs@TiO2 magnetic hybrid nanofibers
T2 - Preparation and electromagnetic parameters regulation for enhanced microwave absorption
AU - Wang, Jiqi
AU - Cui, Yuhong
AU - Wu, Fei
AU - Shah, Tariq
AU - Ahmad, Mudasir
AU - Zhang, Aibo
AU - Zhang, Qiuyu
AU - Zhang, Baoliang
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/15
Y1 - 2020/9/15
N2 - In this paper, a three-step method has been applied for preparation of Fe/Fe3O4@TCNFs@TiO2 magnetic hybrid nanofibers (MHNFs) with three-layer core-shell structure. Firstly, tubular polymer nanofiber precursors with FeCl3 embedded in axis (TPNFPs) are synthesized by a confined self-condensation system developed earlier. After high-temperature conversion, tubular magnetic carbon nanofibers loaded with Fe nanoparticles inside (Fe@TCNFs) are obtained. Finally, TiO2 shell formation procedure is carried out by the hydrolysis of tetrabutyl titanate, and MHNFs with different TiO2 loadings are successfully fabricated. This material possesses both magnetic and dielectric loss abilities that shows excellent microwave absorbing performance. Under filler content of 15 wt%, the minimum reflection loss reaches −44.8 dB@13.9 GHz, and the absorbing layer thickness is only 1.6 mm. In addition, the electromagnetic parameters of MHNFs can be regulated and optimized by adjusting TiO2 loading. It brings better impedance matching property and improves microwave absorbing performance. Meanwhile, the composition, structure and electromagnetic parameters of MHNFs are systematically analyzed. The microwave attenuation mechanism is revealed. This study has guiding significance for the performance optimization of existing microwave absorbers.
AB - In this paper, a three-step method has been applied for preparation of Fe/Fe3O4@TCNFs@TiO2 magnetic hybrid nanofibers (MHNFs) with three-layer core-shell structure. Firstly, tubular polymer nanofiber precursors with FeCl3 embedded in axis (TPNFPs) are synthesized by a confined self-condensation system developed earlier. After high-temperature conversion, tubular magnetic carbon nanofibers loaded with Fe nanoparticles inside (Fe@TCNFs) are obtained. Finally, TiO2 shell formation procedure is carried out by the hydrolysis of tetrabutyl titanate, and MHNFs with different TiO2 loadings are successfully fabricated. This material possesses both magnetic and dielectric loss abilities that shows excellent microwave absorbing performance. Under filler content of 15 wt%, the minimum reflection loss reaches −44.8 dB@13.9 GHz, and the absorbing layer thickness is only 1.6 mm. In addition, the electromagnetic parameters of MHNFs can be regulated and optimized by adjusting TiO2 loading. It brings better impedance matching property and improves microwave absorbing performance. Meanwhile, the composition, structure and electromagnetic parameters of MHNFs are systematically analyzed. The microwave attenuation mechanism is revealed. This study has guiding significance for the performance optimization of existing microwave absorbers.
KW - Electromagnetic parameters regulation
KW - Impedance matching
KW - Magnetic hybrid nanofibers
KW - Microwave absorption
KW - Three-layer core-shell structure
UR - http://www.scopus.com/inward/record.url?scp=85084188091&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2020.04.090
DO - 10.1016/j.carbon.2020.04.090
M3 - 文章
AN - SCOPUS:85084188091
SN - 0008-6223
VL - 165
SP - 275
EP - 285
JO - Carbon
JF - Carbon
ER -