构建一维磁性双金属@碳@氮掺杂碳纳米纤维的通用策略以实现高效微波吸收

doi:10.1016/j.actphy.2026.100409

摘要/Abstract

摘要： 开发具有强衰减和良好阻抗匹配的轻质微波吸收剂仍然是一个挑战。本文通过静电纺丝技术制备普鲁士蓝类似物@酚醛树脂@聚丙烯腈前驱体，随后进行碳化，开发了一种组成和温度调控策略，用于制备一维) (1D)二元磁性双金属@碳(C)@氮掺杂碳纳米纤维(CNFs)。前驱体颗粒在PAN衍生纳米纤维中的空间限制有效保持了连续的纤维骨架，并限制了合金纳米颗粒的聚集，从而产生了丰富的磁性双金属/C/CNFs异质界面。碳化温度和前驱体负载量用于调控石墨化程度、介电响应、衰减能力和阻抗匹配特性。在样品中，设计的CoFe@C@CNFs表现出最佳的电磁波吸收性能，在1.92 mm厚度下最小反射损耗为−57.52 dB，有效吸收带宽(EAB)为5.20 GHz。CST模拟进一步证实了CoFe@C@CNFs的有效雷达截面缩减。此外，该方法可扩展到CoNi和FeNi合金体系。这项工作为构建组成可调的1D二元磁性双金属@C@CNFs用于电磁波吸收应用提供了一条通用途径。

关键词: 静电纺丝辅助限域策略, 二元磁性双金属@C@CNFs, 可调组分, 电磁波吸收

Abstract: Developing lightweight microwave absorbers with strong attenuation and favorable impedance matching remains challenging. Herein, a composition and temperature-regulated strategy is developed to fabricate one-dimensional (1D) binary magnetic bimetal@carbon (C)@nitrogen doped carbon nanofibers (CNFs) through the electrospinning of Prussian blue analogue@phenolic resin@polyacrylonitrile precursors followed by thermal conversion. The spatial confinement of precursor particles within PAN-derived nanofibers effectively preserves the continuous fibrous framework and restricts the aggregation of alloy nanoparticles, thereby generating abundant magnetic bimetal/C/CNFs heterogeneous interfaces. Carbonization temperature and precursor loading are used to regulate the graphitization degree, dielectric response, attenuation capability, and impedance matching characteristics. Among the samples, the designed CoFe@C@CNFs exhibits the optimum electromagnetic wave absorption performance with a minimum reflection loss of −57.52 dB and an EAB of 5.20 GHz at 1.92 mm. CST simulations further confirms the effective radar cross-section reduction of the CoFe@C@CNFs. Moreover, the approach is extendable to CoNi and FeNi alloy systems. This work provides a versatile route for constructing composition-tunable 1D binary magnetic bimetal@C@CNFs for electromagnetic wave absorption applications.

Key words: Electrospinning-assisted confinement strategy, Binary magnetic bimetal@C@CNFs, Tunable Composition, Electromagnetic wave absorption

张子琪, 汪和敏, 许倍嘉, 肖俊雄, 刘树成, 杨晶亮, 战倍倍, 张振乾, 祁小四. 构建一维磁性双金属@碳@氮掺杂碳纳米纤维的通用策略以实现高效微波吸收[J]. 物理化学学报 2026, (), 0. doi: 10.1016/j.actphy.2026.100409

Ziqi Zhang, Hemin Wang, Beijia Xu, Junxiong Xiao, Shucheng Liu, Jing-Liang Yang, Beibei Zhan, Zhenqian Zhang, Xiaosi Qi. A generalizable strategy for constructing one-dimensional magnetic bimetal@carbon@nitrogen doped carbon banofibers towards high-efﬁcient microwave absorption[J]. Acta Phys. -Chim. Sin. 2026, (), 0. doi: 10.1016/j.actphy.2026.100409

链接本文: https://www.whxb.pku.edu.cn/CN/10.1016/j.actphy.2026.100409

https://www.whxb.pku.edu.cn/CN/Y2026/V/I/0

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