Construction of MOF-derived plum-like NiCo@C composite with enhanced multi-polarization for high-efficiency microwave absorption

• Published in: Journal of colloid and interface science Vol. 609; pp. 224 - 234
• Main Authors: Cheng, Runrun, Wang, Yan, Di, Xiaochuang, Lu, Zhao, Wang, Ping, Ma, Mingliang, Ye, Jinrui
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.03.2022
• Subjects: Electromagnetic absorption; Metal-organic framework (MOF); Plum-like NiCo@C; Synergistic effect; Synergistic effect; Electromagnetic absorption; Metal-organic framework (MOF); Plum-like NiCo@C
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2021.11.197

[Display omitted] Nowadays, facing the inevitable electromagnetic (EM) pollution caused by many electronic products, it is urgent to develop high-performance microwave absorbing materials. In particular, the bimetallic carbon-based composites derived from MOFs exhibit excellent microwave absorption potential due to their simple preparation, low cost, adjustable morphology and magnetoelectric synergy mechanism. In this work, we successfully prepared plum-like NiCo@C composite by simple solvothermal method and carbonization treatment, which displays strong absorption (-55.4 dB) and wide effective absorption band (EAB, 7.2 GHz) when the loading is 20 wt%. The plum-like structure greatly enriches the non-uniform interface and the structural anisotropy contributes to the dissipation of electromagnetic waves. At the same time, the band hybridization and magnetic coupling of NiCo@C contribute to the coordination of EM characteristics. Overall, this work proves the feasibility of NiCo@C hierarchical composite in the field of microwave absorbing, and provides insight for the development of high-performance absorbers.