A novel and facile-to-synthesize three-dimensional honeycomb-like nano-Fe3O4@C composite: Electromagnetic wave absorption with wide bandwidth

被引：91
作者：
Deng, Yunfei [1 ]
Zheng, Yun [2 ]
Zhang, Danfeng [3 ]
Han, Congai [1 ]
Cheng, Ao [1 ]
Shen, Junyao [1 ]
Zeng, Guoxun [1 ]
Zhang, Haiyan [1 ]
机构：
[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
[2] Sun Yat Sen Univ, Canc Ctr, State Key Lab Oncol South China, Guangzhou, Peoples R China
[3] Guangdong Univ Technol, Sch Comp Sci & Technol, Guangzhou 510006, Peoples R China
来源：
CARBON | 2020年 / 169卷
关键词：
Colloidal template method; Three-dimensional honeycomb-like structure; EM wave Absorption; MICROWAVE-ABSORPTION; REVERSIBLE CAPACITY; FE3O4; NANOPARTICLES; CARBON NANOTUBES; GRAPHENE; PERFORMANCE; EFFICIENT; PERMITTIVITY; MICROSPHERES; LIGHTWEIGHT;
D O I：
10.1016/j.carbon.2020.05.021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The three-dimensional honeycomb-like nano-Fe3O4@C (HcFe(3)O(4)@C) composite and the three-dimensional honeycomb-like porous carbon (HcC) were prepared through a two-step colloidal template method. The HcFe(3)O(4)@C composite material shows a three-dimensional multilayer honeycomblike structure with a uniform pore diameter of 100 nm, while the HcFe3O4@C composite exhibits enhanced absorbing properties with a low Fe3O4 content(28.95%). HcFe(3)O(4)@C composite display an optimal reflection loss (RL) value of -46.4 dB at 9.6 GHz at a thin thickness of 3.5 mm, and a wide absorption bandwidth of 5.04 GHz. These enhanced EM wave absorption performances are attributed to the synergistic effects of Fe3O4 and carbon as well as the structural advantages, such as multiple reflections of electromagnetic waves in the three-dimensional honeycomb structure and interface polarization caused by Fe3O4 nanoparticles and carbon layer. The work herein reported provides a new route for preparing ferrite-carbon based absorbers with honeycomb-like nanostructures. (C) 2020 Elsevier Ltd. All rights reserved.
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收藏
页码：118 / 128
页数：11
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