TY - JOUR
T1 - ZIF-67 derived porous core-shell nanocomposites for high-efficiency electromagnetic absorption
AU - Ma, Cankun
AU - Wang, Yicheng
AU - Zhang, Chenghao
AU - Huang, Yufei
AU - Zhang, Xiuqin
AU - Peng, Jing
AU - Chai, Chunpeng
AU - Yuan, Mengfei
AU - Ma, Huiling
AU - Zhai, Maolin
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/15
Y1 - 2023/11/15
N2 - N-doped porous core-shell nanocomposite is considered to be a competent candidate for the absorbing of electromagnetic wave (EMW). In this work, polydopamine (PDA) wrapped ZIF-67 (Z@P) precursors with the core-shell structure were obtained through ZIF-67 triggered dopamine self-polymerization. After high-temperature pyrolysis treatment, the N-doped graphitized carbon layers wrapped cobalt (Co@CNs) absorber with porous structure was obtained, which exhibited high efficiency and adjustable EMW absorbing properties. The minimum reflection loss (RLmin) of Co@CN-60 approached −59.08 dB at 17.7 GHz with a thickness of 1.7 mm. The effective absorption bandwidth (EAB) reached 5.8 GHz with a corresponding thickness of 2.3 mm. Besides, the RLmin of Co@CN-90 reaches −44.07 dB at 14.5 GHz (thickness 2.0 mm), and the EAB is 5.9 GHz. Therefore, the porous core-shell Co@CNs nanocomposite is expected to be a promising EMW absorption material.
AB - N-doped porous core-shell nanocomposite is considered to be a competent candidate for the absorbing of electromagnetic wave (EMW). In this work, polydopamine (PDA) wrapped ZIF-67 (Z@P) precursors with the core-shell structure were obtained through ZIF-67 triggered dopamine self-polymerization. After high-temperature pyrolysis treatment, the N-doped graphitized carbon layers wrapped cobalt (Co@CNs) absorber with porous structure was obtained, which exhibited high efficiency and adjustable EMW absorbing properties. The minimum reflection loss (RLmin) of Co@CN-60 approached −59.08 dB at 17.7 GHz with a thickness of 1.7 mm. The effective absorption bandwidth (EAB) reached 5.8 GHz with a corresponding thickness of 2.3 mm. Besides, the RLmin of Co@CN-90 reaches −44.07 dB at 14.5 GHz (thickness 2.0 mm), and the EAB is 5.9 GHz. Therefore, the porous core-shell Co@CNs nanocomposite is expected to be a promising EMW absorption material.
KW - Electromagnetic wave absorber
KW - Metal-organic frameworks
KW - Polydopamine
KW - Porous core-shell structure
UR - http://www.scopus.com/inward/record.url?scp=85164227108&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2023.157913
DO - 10.1016/j.apsusc.2023.157913
M3 - Article
AN - SCOPUS:85164227108
SN - 0169-4332
VL - 637
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 157913
ER -