Reduced graphene oxide modified mesoporous FeNi alloy/carbon microspheres for enhanced broadband electromagnetic wave absorbers†,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Reduced graphene oxide modified mesoporous FeNi alloy/carbon microspheres for enhanced broadband electromagnetic wave absorbers†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-04-27 00:00:00 , DOI: 10.1039/c7qm00067g
Juan Li _{1,

2,

3,

4,

5} , Lei Wang _{6,

7,

8,

9,

10} , Dong Zhang _{3,

4,

7,

11,

12} , Yue Qu _{1,

2,

3,

4,

5} , Guangming Wang _{1,

2,

3,

4,

5} , Ge Tian _{1,

2,

3,

4,

5} , Anhua Liu _{1,

2,

3,

4,

5} , Huijuan Yue _{1,

2,

3,

4,

5} , Shouhua Feng _{1,

2,

3,

4,

5}

Affiliation

Absorbers have been investigated widely so as to eliminate or at least significantly attenuate the hazards of electromagnetic radiation. A porous structure is believed to be beneficial for the high-performance of microwave absorption. Here, an embedded magnetic mesoporous composite (FeNi alloyed porous carbon microspheres, FeNi/CS) is for the first time evaluated as a microwave absorbing material. Upon combining reduced graphene oxide (rGO) with the FeNi/CS composite, a multiple-component absorber of FeNi/CS/rGO is synthesized via hydrothermal and freeze-drying processes. Compared to unmodified FeNi/CS, the FeNi/CS/rGO composite provides an effective component and a more specific structure, which is favorable for translating microwave into thermal energy or other forms of energy. The minimum reflection loss (RL) value of the FeNi/CS/rGO composite reaches −45.2 dB at a thickness of 1.5 mm, and the maximum effective microwave absorption bandwidth (RL < −10 dB) is up to 5.0 GHz at d = 1.5 mm. In virtue of the dielectric loss, magnetic loss, unique heterostructure of the absorber, and impedance matching, the FeNi/CS/rGO composite exhibits overwhelming advantages of low density, small thickness, broad bandwidth, strong absorption and high anti-oxidation capability.

中文翻译：

还原石墨烯改性的介孔FeNi合金/碳微球，用于增强型宽带电磁波吸收器†

吸收器已被广泛研究以消除或至少显着减弱电磁辐射的危害。据信多孔结构对于微波吸收的高性能是有益的。在此，首次评估了嵌入的磁性介孔复合材料（FeNi合金化多孔碳微球，FeNi / CS）作为微波吸收材料。通过将还原氧化石墨烯（rGO）与FeNi / CS复合材料结合，可通过以下方法合成FeNi / CS / rGO的多组分吸收剂水热和冷冻干燥工艺。与未改性的FeNi / CS相比，FeNi / CS / rGO复合材料提供了有效的成分和更特定的结构，这有利于将微波转换为热能或其他形式的能量。FeNi / CS / rGO复合材料的最小反射损耗（RL）值在1.5 mm的厚度下达到-45.2 dB，最大有效微波吸收带宽（RL <−10 dB）在d = 1.5时高达5.0 GHz毫米。凭借介电损耗，磁损耗，吸收体独特的异质结构和阻抗匹配，FeNi / CS / rGO复合材料具有压倒性优势，低密度，小厚度，宽带宽，强吸收性和高抗氧化能力。

更新日期：2017-04-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文