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Hierarchical and Orderly Surface Conductive Networks in Yolk–Shell Fe3O4@C@Co/N-Doped C Microspheres for Enhanced Microwave Absorption
Small ( IF 13.0 ) Pub Date : 2023-06-01 , DOI: 10.1002/smll.202302961 Peng He 1 , Wenjun Ma 1 , Jian Xu 1 , Yizhe Wang 1 , Zhong-Kai Cui 2 , Jie Wei 1 , Peiyuan Zuo 1 , Xiaoyun Liu 1 , Qixin Zhuang 1
Small ( IF 13.0 ) Pub Date : 2023-06-01 , DOI: 10.1002/smll.202302961 Peng He 1 , Wenjun Ma 1 , Jian Xu 1 , Yizhe Wang 1 , Zhong-Kai Cui 2 , Jie Wei 1 , Peiyuan Zuo 1 , Xiaoyun Liu 1 , Qixin Zhuang 1
Affiliation
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Constructing the adjustable surface conductive networks is an innovation that can achieve a balance between enhanced attenuation and impedance mismatch according to the microwave absorption mechanism. However, the traditional design strategies remain significant challenges in terms of rational selection and controlled growth of conductive components. Herein, a hierarchical construction strategy and quantitative construction technique are employed to introduce conductive metal–organic frameworks (MOFs) derivatives in the classic yolk–shell structure composed of electromagnetic components and the cavity for remarkable optimized performance. Specifically, the surface conductive networks obtained by carbonized ZIF-67 quantitative construction, together with the Fe3O4 magnetic core and dielectric carbon layer linked by the cavity, achieve the cooperative enhancement of impedance matching optimization and synergistic attenuation in the Fe3O4@C@Co/N-Doped C (FCCNC) absorber. This interesting design is further verified by experimental results and simulation calculations. The products FCCNC-2 yield a distinguished minimum reflection loss of −66.39 dB and an exceptional effective absorption bandwidth of 6.49 GHz, indicating that moderate conduction excited via hierarchical and quantitative design can maximize the absorption capability. Furthermore, the proposed versatile methodology of surface assembly paves a new avenue to maximize beneficial conduction effect and manipulate microwave attenuation in MOFs derivatives.
中文翻译：
蛋黄壳 Fe3O4@C@Co/N 掺杂 C 微球中的分层有序表面导电网络增强微波吸收
构建可调节表面传导网络是一项创新，可以根据微波吸收机制实现增强衰减和阻抗失配之间的平衡。然而，传统的设计策略在导电元件的合理选择和控制生长方面仍然面临重大挑战。在此，采用分层构建策略和定量构建技术，在由电磁元件和空腔组成的经典蛋黄壳结构中引入导电金属有机框架（MOF）衍生物，以获得显着的优化性能。具体而言，通过碳化ZIF-67定量构建得到的表面导电网络，与空腔连接的Fe 3 O 4磁芯和介电碳层一起，实现了Fe 3 O 4中阻抗匹配优化和协同衰减的协同增强。 @C@Co/N-掺杂C (FCCNC) 吸收体。这个有趣的设计通过实验结果和模拟计算得到进一步验证。产品FCCNC-2具有-66.39 dB的最小反射损耗和6.49 GHz的出色有效吸收带宽，这表明通过分级和定量设计激发的适度传导可以最大限度地提高吸收能力。此外，所提出的多功能表面组装方法为最大化有益传导效应和控制 MOF 衍生物中的微波衰减铺平了一条新途径。
更新日期：2023-06-01
中文翻译：
蛋黄壳 Fe3O4@C@Co/N 掺杂 C 微球中的分层有序表面导电网络增强微波吸收
构建可调节表面传导网络是一项创新，可以根据微波吸收机制实现增强衰减和阻抗失配之间的平衡。然而，传统的设计策略在导电元件的合理选择和控制生长方面仍然面临重大挑战。在此，采用分层构建策略和定量构建技术，在由电磁元件和空腔组成的经典蛋黄壳结构中引入导电金属有机框架（MOF）衍生物，以获得显着的优化性能。具体而言，通过碳化ZIF-67定量构建得到的表面导电网络，与空腔连接的Fe 3 O 4磁芯和介电碳层一起，实现了Fe 3 O 4中阻抗匹配优化和协同衰减的协同增强。 @C@Co/N-掺杂C (FCCNC) 吸收体。这个有趣的设计通过实验结果和模拟计算得到进一步验证。产品FCCNC-2具有-66.39 dB的最小反射损耗和6.49 GHz的出色有效吸收带宽，这表明通过分级和定量设计激发的适度传导可以最大限度地提高吸收能力。此外，所提出的多功能表面组装方法为最大化有益传导效应和控制 MOF 衍生物中的微波衰减铺平了一条新途径。
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