Highly efficient electromagnetic absorption on ZnN4-based MOFs-derived carbon composites

Tong Gao, Zhenying Zhu, Yixing Li, Haihua Hu, Huawei Rong, Weiwei Liu, Tao Yang, Xuefeng Zhang

科研成果: 期刊稿件文章同行评审

47 引用 (Scopus)

摘要

Rapid expansion in microelectronic devices has accelerated considerable attention on the development of high-performance electromagnetic wave absorption materials. We herein reported a nitrogen-anchored Zn single atom microwave absorber derived from zeolitic imidazolate frameworks with high Zn–N4 content (18.4%) and defect concentration (2.43 × 1011 cm−2), thus featuring with remarkable dielectric loss tangent ∼5.6. Theoretical calculations revealed that this significant enhancement was originated from the coordination structure of single zinc atoms localized within carbon matrix, associated with a high density of permanent electric dipoles that act as atomic-scale polarization sites under the alternating electromagnetic field. This work has important significance in understanding the physical origin of electromagnetic wave absorption for the MOFs and provides an alternative for designing the excellent electromagnetic wave absorption materials.

源语言英语
页(从-至)44-51
页数8
期刊Carbon
177
DOI
出版状态已出版 - 15 6月 2021
已对外发布

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