Development of Novel Graphene/g-C3N4 Composite with Broad-Frequency and Light-Weight Features
Development of Novel Graphene/g-C3N4 Composite with Broad-Frequency and Light-Weight Features
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DOI：
10.1002/ppsc.201600065
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发表时间：
2016-09-01
影响因子：
2.7
通讯作者：
Ji, Guangbin
中科院分区：
文献类型：
--
作者：
Lv, Hualiang;Zhang, Haiqian;Ji, Guangbin
在本研究中，开发了一种新型石墨烯/g-C3N4微波吸收剂来解决电磁波干扰问题。石墨烯/g-C3N4复合材料是通过简单的液相法将g-C3N4纳米片加载在石墨烯上合成的。可实现高性能的电磁吸收性能。在厚度为1.5 mm的薄涂层下，反射损耗值可达-29.6 dB。同时，该复合材料相应的吸收带宽可达5.2 GHz （12.8-18 GHz）。优异的电磁吸收性能可能归因于电流衰减理论，该理论已被多孔石墨烯或氧化石墨烯取代。结果表明，g-C3N4在石墨烯上的自由电子数和负载质量对电流衰减强度和电阻值起关键作用。
In this study, a novel graphene/g-C3N4 microwave absorber is developed to solve the electromagnetic wave interference problem. Graphene/g-C3N4 composite is synthesized by loading g-C3N4 nanosheets on graphene through a simple liquid-phase approach. High-performance electromagnetic absorption performance can be achieved. The optimal reflection loss value is up to -29.6 dB under a thin coating layer of 1.5 mm. At the same time, the corresponding absorption bandwidth of this composite can reach 5.2 GHz (12.8-18 GHz). Excellent electromagnetic absorption property may be attributed to the current attenuation theory which has been proven by replacing graphene with porous graphene or graphene oxide. The results reveal that free electron numbers and loading mass of g-C3N4 on graphene play the key roles in the intensity of current attenuation and resistance value.