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| 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 |
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Cite this article:
ZHU Xiaoyu, QIU Hongfang, CHEN Ping. Preparation and Electromagnetic Wave Absorbing Properties of Composites of Cobalt Coated Graphitic Carbon Nitride Co@CNTs. Chinese Journal of Materials Research, 2021, 35(11): 811-819.
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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 (RLmin) 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.
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Received: 18 August 2021
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| Fund: Liaoning Revitalization Talents Program(XLYC1802085);National Natural Science Foundation of China(51873109);Fundamental Research Funds for the Central Universities(DUT20TD207);Dalian Science and Technology Innovation Fund Project(2019J11CY007);Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education(KF2004) |
About author: CHEN Ping, Tel: (411)84986100, E-mail: pchen@dlut.edu.cn
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