通过界面和缺陷调制引发二元金属氧化物微管电磁波吸收体的超宽吸收带宽。

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Nano-Micro Letters Pub Date : 2023-10-09 DOI:10.1007/s40820-023-01197-0

Fushan Li, Nannan Wu, Hideo Kimura, Yuan Wang, Ben Bin Xu, Ding Wang, Yifan Li, Hassan Algadi, Zhanhu Guo, Wei Du, Chuanxin Hou

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引用次数: 0

摘要

钴镍双金属氧化物（NiCo2O4）以其可控的形貌、高温、耐腐蚀性和强的电磁波吸收能力而受到广泛关注。然而，对于NiCo2O4基吸收剂来说，加宽吸收带宽仍然是一个巨大的挑战。在这里NiCo2O4@C采用简单的牺牲模板策略制备了具有中空结构的核壳微管。三维（3D）立方体空心核壳的氧空位浓度和形貌NiCo2O4@C通过调节煅烧温度，有效地优化了骨架。专门设计的3D框架结构便于入射电磁波的多次反射，并在多个组件之间提供了丰富的界面，产生了显著的界面极化损耗。氧空位引起的偶极极化可以进一步增强对入射电磁波的衰减能力。优化后的NiCo2O4@C空心微管在厚度为3.0mm的情况下，在8.4GHz下表现出优异的EMW吸收能力，最小RL（RLmin）为-84.45dB。此外，获得了高达12.48GHz（5.52-18GHz）的超宽有效吸收带宽（EAB）。这项工作被认为为合成具有优异EMW吸收能力的高性能钴镍双金属氧化物，特别是在拓宽有效吸收带宽方面开辟了道路。

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Initiating Binary Metal Oxides Microcubes Electromagnetic Wave Absorber Toward Ultrabroad Absorption Bandwidth Through Interfacial and Defects Modulation

Highlights

3D cubic hollow core–shell NiCo₂O₄@C composites were synthesized.
Oxygen vacancies were introduced into the prepared composites.
Ultrabroad effective absorption bandwidth of 12.48 GHz was obtained.
The absorption performance mechanism of NiCo₂O₄/C composites was investigated.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.