Microwave-based preparation and characterization of Fe-cored carbon nanocapsules with novel stability and super electromagnetic wave absorption performance
Microwave-based preparation and characterization of Fe-cored carbon nanocapsules with novel stability and super electromagnetic wave absorption performance
复制标题
具有新型稳定性和超强电磁波吸收性能的铁核碳纳米胶囊的微波制备及表征
DOI：
10.1016/j.carbon.2018.04.026
复制
发表时间：
2018-08
期刊：
影响因子：
10.9
通讯作者：
Li Zhe
中科院分区：
文献类型：
--
作者：
Wang Yican;Wang Wenlong;Sun Jing;Sun Chenggong;Feng Yukun;Li Zhe
微波金属放电是一种简便的方法，可以制备具有高纯度、新稳定性和非凡电磁波（EMW）吸收性能的独特铁核碳纳米胶囊（Fe@CNCs）。考察了微波功率、辐射时间和环己烷/二茂铁比例对Fe@CNCs制备的影响，并对产物的Fe含量、物相、产率、石墨化度和微观结构等性能进行了研究。结果表明，所制备的Fe@CNCs在2-18 GHz范围内表现出极高的电磁波吸收性能，易于与反应体系分离。在最小反射损耗（RL）值超过−10 dB时，EMW吸收带宽可达13.8 GHz，吸收体厚度为1.5-5 mm。此外，Fe@ CNC还获得了新的热氧化稳定性和超级抗腐蚀性能，因为在高达420 °C的温度下在空气和酸中的加速降解测试中没有观察到任何腐蚀或氧化降解损失的迹象。所制备的纳米复合微胶囊的极高的电磁波吸收性能与上级的抗降解和抗腐蚀性能相结合，突出了微波-金属放电在合成先进的金属芯纳米碳微胶囊中的新颖能力，其在不同领域具有广阔的应用前景，例如但不限于微波吸收，电磁屏蔽和先进分离等。
Microwave-metal discharge was proposed as a facile methodology to prepare unique Fe-cored carbon nanocapsules (Fe@CNCs) with high purity, novel stability and extraordinary electromagnetic wave (EMW) absorption performance. The effect of microwave power, irradiation time and cyclohexane/ferrocene ratio on the production of Fe@CNCs was examined and the properties of the nanocapsules, such as their Fe content, phase, yield, degree of graphitization and associated microstructures were investigated in detail. It was found that the prepared Fe@CNCs, which can easily be separated from the reaction system, displayed exceedingly high electromagnetic wave (EMW) absorption performance over the 2–18 GHz range. At the minimal reflection loss (RL) values over −10 dB, the EMW absorption bandwidth can reach up to 13.8 GHz with an absorber thickness of 1.5–5 mm. In addition, novel thermo-oxidative stability and super anti-corrosion property were also obtained for the Fe@CNCs as no signs of any corrosion or oxidative degradation loss were observed from the accelerated degradation tests in air and acid at temperatures up to 420 °C. The exceedingly high EMW absorption performance coupled with the superior anti-degradation and anti-corrosion properties of the prepared nanocomposite microcapsules highlights the novel capability of microwave-metal discharge in synthesizing advanced metal-cored nanocarbon microcapsules with promising application potentials in diverse fields, such as but not limited to microwave absorption, EM shielding and advanced separations etc.
登录
查看更多内容
影响因子：
3.4
作者：
Zhang, X. F.;Dong, X. L.;Choi, C. J.
通讯作者：
Choi, C. J.
影响因子：
19
作者：
Kainz, Quirin M.;Linhardt, Roland;Reiser, Oliver
通讯作者：
Reiser, Oliver
通过微波金属放电处理生物质焦油模型化合物的新方法
影响因子：
7.4
作者：
孙静;王文龙;宋占龙;赵希强;毛岩鹏;马春元
通讯作者：
马春元
影响因子：
10.9
作者：
Ozaki, Jun-ichi;Kimura, Naofumi;Oya, Asao
通讯作者：
Oya, Asao
石墨烯、Fe3O4@Fe核@壳和ZnO纳米粒子组成的四元纳米复合材料：合成及其优异的电磁吸收性能
影响因子：
9.5
作者：
Ren, Yu-Lan;Wu, Hong-Yu;Ouyang, Qiu-Yun
通讯作者：
Ouyang, Qiu-Yun