TY - JOUR
T1 - Synthesis of CoNi/SiO2 core-shell nanoparticles decorated reduced graphene oxide nanosheets for enhanced electromagnetic wave absorption properties
AU - Liu, Xudong
AU - Huang, Ying
AU - Zhang, Na
AU - Zhou, Suhua
N1 - Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/12/15
Y1 - 2018/12/15
N2 - In this research, the nanocomposites, CoNi/SiO2 core-shell nanoparticles decorated reduced graphene oxide (RGO) nanosheets, are successfully synthesized via liquid-phase reduction reactions combined with a sol-gel route. The structures, morphologies, chemical composition and magnetic properties of CoNi nanoparticles, CoNi/SiO2 core-shell nanoparticles and RGO/CoNi/SiO2 nanocomposites have been investigated in exhaustive detail. The electromagnetic (EM) parameters of RGO/CoNi/SiO2 nanocomposites are measured using a vector network analyzer. The results reveal that the RGO/CoNi/SiO2 nanocomposites display enhanced EM wave absorption properties with the maximum reflection loss (RL) of − 46.3 dB at 6.2 GHz with a matching thickness of 4.2 mm. Additionally, the absorption bandwidth corresponding to the RL less than − 10 dB is up to 14.3 GHz (3.7–18.0 GHz) with a matching thickness range of 2.0–5.0 mm. To comprehensively consider the absorption bandwidth and the maximum RL, the integrational method which defines ΔS as the integration area of RL (RL < − 10 dB) and RE as EM wave absorption efficiency is adopted to reveal that the RGO/CoNi/SiO2 nanocomposites exhibit the excellent absorption properties with the matching thickness of only 2.0 mm. Accordingly, the as-prepared RGO/CoNi/SiO2 nanocomposites could be applied as promising EM wave absorption materials.
AB - In this research, the nanocomposites, CoNi/SiO2 core-shell nanoparticles decorated reduced graphene oxide (RGO) nanosheets, are successfully synthesized via liquid-phase reduction reactions combined with a sol-gel route. The structures, morphologies, chemical composition and magnetic properties of CoNi nanoparticles, CoNi/SiO2 core-shell nanoparticles and RGO/CoNi/SiO2 nanocomposites have been investigated in exhaustive detail. The electromagnetic (EM) parameters of RGO/CoNi/SiO2 nanocomposites are measured using a vector network analyzer. The results reveal that the RGO/CoNi/SiO2 nanocomposites display enhanced EM wave absorption properties with the maximum reflection loss (RL) of − 46.3 dB at 6.2 GHz with a matching thickness of 4.2 mm. Additionally, the absorption bandwidth corresponding to the RL less than − 10 dB is up to 14.3 GHz (3.7–18.0 GHz) with a matching thickness range of 2.0–5.0 mm. To comprehensively consider the absorption bandwidth and the maximum RL, the integrational method which defines ΔS as the integration area of RL (RL < − 10 dB) and RE as EM wave absorption efficiency is adopted to reveal that the RGO/CoNi/SiO2 nanocomposites exhibit the excellent absorption properties with the matching thickness of only 2.0 mm. Accordingly, the as-prepared RGO/CoNi/SiO2 nanocomposites could be applied as promising EM wave absorption materials.
KW - CoNi/SiO core-shell nanoparticles
KW - EM wave absorption properties
KW - Integrational method
KW - Nanocomposites
UR - http://www.scopus.com/inward/record.url?scp=85052754892&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.08.337
DO - 10.1016/j.ceramint.2018.08.337
M3 - 文章
AN - SCOPUS:85052754892
SN - 0272-8842
VL - 44
SP - 22189
EP - 22197
JO - Ceramics International
JF - Ceramics International
IS - 18
ER -