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Modern Physics 2025
双金属MOFs微波吸收材料的制备与性能研究
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Abstract:
金属–有机框架(Metal-Organic Frameworks, MOFs)是一种有效的吸波材料，其中双金属的协同作用有益于提高材料的吸波性能。本文利用溶液法制备了以2-甲基咪唑为有机配体的具有较稳定吸收带宽的CoNi/C微波吸收材料。在与30%石蜡混合下制样，对该材料微波吸收开展研究。调控金属比例，探究金属掺杂量以及不同热解温度对材料吸波性能的影响。采用扫描电子显微镜对样品形貌进行表征发现在热解温度为700℃下有较规则形貌，在2~18 GHz的频率范围测试样品的微波吸收性能，解析其相关性能。
Metal-Organic Frameworks (MOFs) are effective wave-absorbing materials, and the synergistic effect of bimetallic components is beneficial for enhancing their microwave absorption performance. In this study, a CoNi/C microwave-absorbing material with a relatively stable absorption bandwidth was synthesized via a solution method using 2-methylimidazole as the organic ligand. Samples were prepared by mixing the material with 30% paraffin, and their microwave absorption properties were investigated. The effects of metal ratio, doping amount, and pyrolysis temperature on the material’s absorption performance were explored. Scanning electron microscopy (SEM) characterization revealed that the sample pyrolyzed at 700？C exhibited a more regular morphology. The microwave absorption performance of the samples was tested in the 2~18 GHz frequency range, and the related properties were analyzed.
| [1] | 严尧, 张思凡, 袁宁凯, 等. TiC粉体的形貌调控及吸波性能研究[J]. 陶瓷学报, 2024, 45(5): 985-992. |
| [2] | Jin, C., Wu, Z., Yang, C., Wang, L., Zhang, R., Xu, H., et al. (2022) Impedance Amelioration of Coaxial-Electrospun TiO2@Fe/C@TiO2 Vesicular Carbon Microtubes with Dielectric-Magnetic Synergy toward Highly Efficient Microwave Absorption. Chemical Engineering Journal, 433, Article ID: 133640. https://doi.org/10.1016/j.cej.2021.133640 |
| [3] | Shen, B., Zhai, W., Tao, M., Ling, J. and Zheng, W. (2013) Lightweight, Multifunctional Polyetherimide/Graphene@Fe3O4 Composite Foams for Shielding of Electromagnetic Pollution. ACS Applied Materials & Interfaces, 5, 11383-11391. https://doi.org/10.1021/am4036527 |
| [4] | Lu, M., Cao, W., Shi, H., Fang, X., Yang, J., Hou, Z., et al. (2014) Multi-Wall Carbon Nanotubes Decorated with ZnO Nanocrystals: Mild Solution-Process Synthesis and Highly Efficient Microwave Absorption Properties at Elevated Temperature. Journal of Materials Chemistry A, 2, 10540-10547. https://doi.org/10.1039/c4ta01715c |
| [5] | Li, D., Liao, H., Kikuchi, H. and Liu, T. (2017) Microporous Co@C Nanoparticles Prepared by Dealloying CoAl@C Precursors: Achieving Strong Wideband Microwave Absorption via Controlling Carbon Shell Thickness. ACS Applied Materials & Interfaces, 9, 44704-44714. https://doi.org/10.1021/acsami.7b13538 |
| [6] | Green, M. and Chen, X. (2019) Recent Progress of Nanomaterials for Microwave Absorption. Journal of Materiomics, 5, 503-541. https://doi.org/10.1016/j.jmat.2019.07.003 |
| [7] | Zhang, Z., Cai, Z., Wang, Z., Peng, Y., Xia, L., Ma, S., et al. (2021) A Review on Metal-Organic Framework-Derived Porous Carbon-Based Novel Microwave Absorption Materials. Nano-Micro Letters, 13, Article No. 56. https://doi.org/10.1007/s40820-020-00582-3 |
| [8] | Zhang, X., Qiao, J., Wang, F., Lv, L., Xu, D., Jiang, Y., et al. (2020) Tailoring Electromagnetic Absorption Performances of TiO2/Co/Carbon Nanofibers through Tuning Graphitization Degrees. Ceramics International, 46, 4754-4761. https://doi.org/10.1016/j.ceramint.2019.10.207 |
| [9] | Zhu, Q. and Xu, Q. (2014) Metal-Organic Framework Composites. Chemical Society Reviews, 43, 5468-5512. https://doi.org/10.1039/c3cs60472a |
| [10] | Zhang, R., Hu, Q., Yang, S., Yan, S., Gu, Y., Ji, J., et al. (2024) MoF‐Fe@C Nanocomposites for Microwave Absorption. Advanced Engineering Materials, 26, Article ID: 2400527. https://doi.org/10.1002/adem.202400527 |
| [11] | Jinxiao, W., Jianfeng, Y., Jun, Y. and Hui, Z. (2021) An Ni-Co Bimetallic MoF-Derived Hierarchical CNT/CoO/Ni2O3 Composite for Electromagnetic Wave Absorption. Journal of Alloys and Compounds, 876, Article ID: 160126. https://doi.org/10.1016/j.jallcom.2021.160126 |
| [12] | Gao, N., Li, W., Wang, W., Liu, D., Cui, Y., Guo, L., et al. (2020) Balancing Dielectric Loss and Magnetic Loss in Fe-NiS2/NiS/PVDF Composites toward Strong Microwave Reflection Loss. ACS Applied Materials & Interfaces, 12, 14416-14424. https://doi.org/10.1021/acsami.9b23379 |
| [13] | Wu, Z., Pei, K., Xing, L., Yu, X., You, W. and Che, R. (2019) Enhanced Microwave Absorption Performance from Magnetic Coupling of Magnetic Nanoparticles Suspended within Hierarchically Tubular Composite. Advanced Functional Materials, 29, Article ID: 1901448. https://doi.org/10.1002/adfm.201901448 |
