TY - JOUR
T1 - ZIF-67 derived CoNi@carbon/RGO composites with abundant heterogeneous interfaces for electromagnetic wave absorption
AU - Ma, Cankun
AU - Zhang, Chenghao
AU - Yuan, Mengfei
AU - Guo, Xiaonan
AU - Liu, Xiaoting
AU - Zhang, Xiuqin
AU - Chai, Chunpeng
AU - Zhang, Youwei
AU - Ma, Huiling
AU - Wang, Yu
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/8/30
Y1 - 2024/8/30
N2 - The controllable structure design and composition regulation play a key role in the development of electromagnetic wave (EMW) absorbing material. Herein, CoNi@carbon/RGO absorbing materials were successfully prepared by direct pyrolysis of ZIF-67/Ni(OH)2/GO precursor. The CoNi@carbon/RGO-15 sample achieves an RLmin value of −46.14 dB and an effective absorption bandwidth (EAB) of 1.15 GHz (thickness 4.1 mm) at a low frequency with a filling amount of only 10 wt%. When the thickness is 1.5 mm, the RLmin reaches −41.09 dB and the EAB reaches 5.41 GHz, covering most of the Ku bands. After the pyrolysis, the carbon layer, Co and Ni nanoparticles, and RGO nanosheets form a three-dimensional porous structure, which builds up abundant heterogeneous interfaces and conductive networks. These factors can enhance impedance matching, dielectric, and magnetic loss. This indicates that CoNi@carbon/RGO is the potential lightweight EMW absorbing material with high performance.
AB - The controllable structure design and composition regulation play a key role in the development of electromagnetic wave (EMW) absorbing material. Herein, CoNi@carbon/RGO absorbing materials were successfully prepared by direct pyrolysis of ZIF-67/Ni(OH)2/GO precursor. The CoNi@carbon/RGO-15 sample achieves an RLmin value of −46.14 dB and an effective absorption bandwidth (EAB) of 1.15 GHz (thickness 4.1 mm) at a low frequency with a filling amount of only 10 wt%. When the thickness is 1.5 mm, the RLmin reaches −41.09 dB and the EAB reaches 5.41 GHz, covering most of the Ku bands. After the pyrolysis, the carbon layer, Co and Ni nanoparticles, and RGO nanosheets form a three-dimensional porous structure, which builds up abundant heterogeneous interfaces and conductive networks. These factors can enhance impedance matching, dielectric, and magnetic loss. This indicates that CoNi@carbon/RGO is the potential lightweight EMW absorbing material with high performance.
KW - Electromagnetic wave absorbing material
KW - Graphene
KW - Metal-organic framework
KW - Ni nanoparticles
UR - https://www.scopus.com/pages/publications/85193428569
U2 - 10.1016/j.apsusc.2024.160283
DO - 10.1016/j.apsusc.2024.160283
M3 - Article
AN - SCOPUS:85193428569
SN - 0169-4332
VL - 665
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 160283
ER -