Co/Er2O3/C ternary nanocomposites derived from cobalt/erbium Prussian blue analogs for efficient microwave absorption

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2024-11-03 DOI:10.1016/j.surfin.2024.105389

Jiawei Zhu , Peng Liao , Suqiong Xu , Wei Ling , Xianke Zhang , Jujun Yuan , Chuicai Rong , Xiaoqing Liu , Zuzhou Xiong

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Abstract

This study presents the synthesis of Er[Co(CN)₆], a Prussian blue analog (ErCo-PBA) with varied morphology, fabricated by modulating the solvent ratio between C₂H₆O and H₂O. This approach leverages the solubility characteristics of K₃[Co(CN)₆] and the consequential influence of C₂H₆O on the crystal growth. When the solvent ratios are 1:8, 8:1, and 1:1, the resulting ErCo-PBA precursors nanorods, irregular particles, and spindle-shaped particles, respectively. After annealing, these precursors in an Ar environment allowed the Co/Er₂O₃/C derivatives to retain the morphology of the precursor well. Electromagnetic parameters testing revealed that Co/Er₂O₃/C-1 exhibits superior electromagnetic wave-absorbing (EMWA) performance among the synthesized derivatives with an effective absorption bandwidth of 5.1 GHz at 1.85 mm and a minimum reflection loss of −56.7 dB at 2.9 mm. The incorporation of Er₂O₃ is an effective method for adjusting and optimizing the electromagnetic parameters of materials, thereby enhancing the EMWA performance of Co/Er₂O₃/C composite. This study highlights the potential of rare-earth oxide/Co/C composites, synthesized through direct annealing rare-earth metal–organic frameworks, as an absorber and are promising candidate to achieve high-efficiency electromagnetic wave absorption.

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由钴/铒普鲁士蓝类似物衍生的 Co/Er2O3/C 三元纳米复合材料可实现高效微波吸收

本研究介绍了通过调节 C2H6O 和 H2O 之间的溶剂比例合成具有不同形态的普鲁士蓝类似物 Er[Co(CN)6]（ErCo-PBA）。这种方法充分利用了 K3[Co(CN)6]的溶解特性以及 C2H6O 对晶体生长的影响。当溶剂比为 1:8、8:1 和 1:1 时，得到的 ErCo-PBA 前驱体分别为纳米棒、不规则颗粒和纺锤形颗粒。这些前驱体在氩气环境中退火后，Co/Er2O3/C 衍生物能很好地保持前驱体的形态。电磁参数测试表明，在合成的衍生物中，Co/Er2O3/C-1 的电磁波吸收（EMWA）性能优越，在 1.85 毫米处的有效吸收带宽为 5.1 GHz，在 2.9 毫米处的最小反射损耗为 -56.7 dB。加入 Er2O3 是调整和优化材料电磁参数的有效方法，从而提高了 Co/Er2O3/C 复合材料的 EMWA 性能。这项研究凸显了通过直接退火稀土金属有机框架合成的稀土氧化物/Co/C 复合材料作为吸收体的潜力，是实现高效电磁波吸收的理想候选材料。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)