<strong>Co@CNT</strong>复合电磁波吸收剂的制备及其吸波性能

doi:10.11901/1005.3093.2021.473

材料研究学报

2021, Vol. 35

Issue (11): 811-819 DOI: 10.11901/1005.3093.2021.473

研究论文

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Co@CNT复合电磁波吸收剂的制备及其吸波性能

朱晓宇¹, 邱红芳¹, 陈平¹^,²(

)

^1.大连理工大学化工学院精细化工国家重点实验室大连 116024
^2.大连理工大学三束材料改性教育部重点实验室大连 116024

Preparation and Electromagnetic Wave Absorbing Properties of Composites of Cobalt Coated Graphitic Carbon Nitride Co@CNTs

ZHU Xiaoyu¹, QIU Hongfang¹, CHEN Ping¹^,²(

)

^1.State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
^2.Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116024, China

引用本文:

朱晓宇, 邱红芳, 陈平. Co@CNT复合电磁波吸收剂的制备及其吸波性能[J]. 材料研究学报, 2021, 35(11): 811-819.
Xiaoyu ZHU, Hongfang QIU, Ping CHEN. Preparation and Electromagnetic Wave Absorbing Properties of Composites of Cobalt Coated Graphitic Carbon Nitride Co@CNTs[J]. Chinese Journal of Materials Research, 2021, 35(11): 811-819.

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摘要:

以石墨相氮化碳(g-C₃N₄)和六水合硝酸钴为原料制备Co@CNT复合电磁波吸收剂，调节Co元素含量以提高其电磁波吸收性能。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、拉曼光谱、扫描电镜(SEM)、能谱分析(EDS)和透射电镜(TEM)等手段表征其微结构和物相组成，使用矢量网络分析仪测量复合物电磁参数并进行Matlab模拟得到反射损耗图。结果表明，Co@CNT-1与石蜡质量比为1：3的材料，其吸波性能最优，厚度为4.1 mm时对电磁波的吸收最强，最小反射损耗(RL_min)为-45.5 dB;厚度仅为1.5 mm的材料，有效吸收带宽(RL<-10 dB)最大为4.42 GHz。

关键词 ：复合材料, 电磁波吸收, 石墨相氮化碳(g-C₃N₄), 碳纳米管

Abstract：

The composite of cobalt coated graphitic carbon nitride (g-C₃N₄) (Co@CNT) for electromagnetic wave (EMW) absorption was prepared via two-step process of co-deposition and calcination with graphitic carbon nitride (g-C₃N₄) and cobalt nitrate hexahydrate as raw materials. The optimal outstanding capacity of EMW absorption of the prepared Co@CNT can be realized through adjusting the Co content of Co@CNTs. The microstructure and phase composition of Co@CNT were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM) with Energy Disperse Spectroscopy (EDS) and transmission electron microscopy (TEM). The electromagnetic parameters and reflection loss (RL) of the composite were measured by vector network analyzer and then the reflection loss diagram is acquired by MATLAB simulation. The results show that EMW absorption performance of Co@CNT-1 is the best when it is mixed with paraffin (mass ratio 1:3). The maximum effective absorption bandwidth (RL<-10 dB) is 4.42 GHz, while the minimum reflection loss (RL_min) is up to -45.5 dB, which were measured with a hollow ring of 7 mm in outer diameter and 1.5 mm in thickness.

Key words： composite electromagnetic wave absorption graphitic carbon nitride (g-C₃N₄) carbon nanotube

收稿日期: 2021-08-18

ZTFLH:

TB332

基金资助:兴辽英才项目(XLYC1802085);国家自然科学基金(51873109);中央高校基本科研基金(DUT20TD207);大连市科技创新基金重大项目(2019J11CY007);三束材料改性教育部重点实验室基金(KF2004)

作者简介: 朱晓宇，男，1995年生，博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.473 或 https://www.cjmr.org/CN/Y2021/V35/I11/811

图1 Co@CNT-(0.5, 1, 2)的扫描电镜照片、Co@CNT-1的透射电镜图以及Co@CNT-1的SAED模型

图2 Co@CNT-(0.5, 1, 2)的拉曼谱和XRD谱

表1 Co@CNT-(0.5, 1, 2)中C和Co的含量

图3 Co@CNT-1的X射线电子能谱

图4 Co@CNT-0.5、Co@CNT-1以及Co@CNT-2的反射损耗曲线

图5 Co@CNT-(0.5, 1, 2)的电磁参数和损耗因子

图6 Co@CNT-0.5、Co@CNT-1以及Co@CNT-2的Cole-Cole曲线

图7 Co@CNT-(0.5, 1, 2)的C0曲线

图8 Co@CNT-(0.5, 1, 2)的匹配常数Z和衰减常数α

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