通过简便的湿化学方法合成具有花状结构的树枝状钴作为一种优异的电磁波吸收剂。
Synthesis of dendritic cobalt with flower-like structure by a facile wet chemistry method as an excellent electromagnetic wave absorber.
作者信息
Tian Konghu, Zhang Qinghe, Liu Xiaowei, Zhang Chao, Yang Fawang
机构信息
Analysis and Test Center, Anhui University of Science and Technology, Huainan 232001, China; School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China.
出版信息
J Colloid Interface Sci. 2023 Nov;649:58-67. doi: 10.1016/j.jcis.2023.06.042. Epub 2023 Jun 13.
In this study, a three-dimensional (3D) floral dendritic cobalt (FDC) consisting of layered flakes was effectively synthesized using a facile wet chemistry method. The impact of the molar amount of NaOH on the microscopic morphology, magnetic characteristics, and electromagnetic wave (EMW) absorption properties of the FDC magnetic materials was comprehensively investigated. The results revealed that the prepared FDC features primary, secondary, and multi-level branches, with the majority of secondary branches being parallel to one another. The dendrites grew closely towards the flower's center at one end, while the tips extend in various directions, forming a dendritic flower cluster. The optimal reflection loss (RL) of S3 at 9.3 GHz was -56.34 dB with a thickness of 1.89 mm, and the maximum effective absorption bandwidth (EAB, RL < -10 dB) reached 6.0 GHz (12.0-18.0 GHz) at a thickness of 1.30 mm. Consequently, the FDC magnetic materials produced in this study presented a method for fabricating high-performance electromagnetic wave absorption (EMWA) materials.
在本研究中，采用简便的湿化学方法有效合成了由层状薄片组成的三维（3D）花状树枝状钴（FDC）。全面研究了NaOH摩尔量对FDC磁性材料微观形貌、磁特性和电磁波（EMW）吸收性能的影响。结果表明，制备的FDC具有一级、二级和多级分支，大多数二级分支相互平行。树枝状晶体一端朝着花的中心紧密生长，而尖端向各个方向延伸，形成树枝状花簇。S3在9.3 GHz时的最佳反射损耗（RL）为-56.34 dB，厚度为1.89 mm，在厚度为1.30 mm时，最大有效吸收带宽（EAB，RL < -10 dB）达到6.0 GHz（12.0 - 18.0 GHz）。因此，本研究制备的FDC磁性材料为高性能电磁波吸收（EMWA）材料的制备提供了一种方法。
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