Bao Wenli, Chen Cong, Si Zhenjun
School of Materials Science and Engineering, Changchun University of Science and Technology No. 7989, Weixing Road Changchun 130022 PR China
Criminal Investigation Department, Jilin Police College Changchun 130117 PR China.
RSC Adv. 2020 Jun 12;10(38):22570-22577. doi: 10.1039/d0ra03921g. eCollection 2020 Jun 10.
Exploration of an economic, easy-producing method to develop high-performance electromagnetic absorber has been a global research interest, owing to the increasingly electromagnetic pollution and interference. In this work, sulfide, nitrogen co-doping carbon (NS-HCS) has been successfully prepared by an copolymer and subsequent calcination reaction. The morphologies and phase compositions of these as-prepared samples are analyzed the transmission electron microscopy (TEM), element mappings, X-ray diffraction (XRD) and X-ray photoelectron spectrum (XPS). The result confirms the hollow shaped structure of amorphous carbon is constructed with various types of N, S based covalent bonds. The dotted N and S elements are contribution for the conductive loss and dipole polarization relaxation behavior. The minimum reflection loss value of -34 dB, and effective bandwidth reaches 6.8 GHz with only 1.6 mm. The as-prepared wideband electromagnetic absorber will pave a simple and effective method to obtain lightweight, broadband and thin thickness electromagnetic absorption materials.
由于电磁污染和干扰日益严重，探索一种经济、易制备的方法来开发高性能电磁吸收体已成为全球研究热点。在这项工作中，通过共聚物和后续煅烧反应成功制备了硫化物、氮共掺杂碳（NS-HCS）。利用透射电子显微镜（TEM）、元素映射、X射线衍射（XRD）和X射线光电子能谱（XPS）对这些制备好的样品的形貌和相组成进行了分析。结果证实了非晶碳的空心结构是由各种类型的基于N、S的共价键构成的。点状的N和S元素有助于传导损耗和偶极极化弛豫行为。最小反射损耗值为-34 dB，有效带宽仅1.6 mm时达到6.8 GHz。所制备的宽带电磁吸收体将为获得轻质、宽带和薄厚度电磁吸收材料铺平一条简单有效的道路。
