Effect of nanoporosity on the electromagnetic wave absorption performance in a biomass-templated Fe3O4/C composite: a small-angle neutron scattering study

被引：49
作者：
Fang, Yuan [1 ]
Xue, Weidong [1 ]
Zhao, Rui [1 ]
Bao, Shengxiang [1 ]
Wang, Wenjian [1 ]
Sun, Liangwei [2 ,3 ]
Chen, Liang [2 ,3 ]
Sun, Guangai [2 ,3 ]
Chen, Bo [2 ,3 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Mat & Energy, 4,Sect 2,North Jianshe Rd, Chengdu 610054, Peoples R China
[2] CAEP, Key Lab Neutron Phys, 64 Mianshan Rd, Mianyang 621999, Sichuan, Peoples R China
[3] CAEP, INPC, 64 Mianshan Rd, Mianyang 621999, Sichuan, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2020年 / 8卷 / 01期
关键词：
DEPENDENT MICROWAVE-ABSORPTION; ABSORBING PROPERTIES; MAGNETIC-PROPERTIES; FACILE PREPARATION; POROUS CARBON; GRAPHENE; NANOCOMPOSITES; POROSITY; FOAMS; SANS;
D O I：
10.1039/c9tc04569d
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A hierarchically porous Fe3O4/C composite was synthesized with a biomass-templated carbothermal strategy and tested as an electromagnetic (EM) wave absorber. The hollow fibrous structure of the cotton template was well retained in the product. The sample synthesized at 600 degrees C exhibited a wide effective absorption bandwidth of 4.4 GHz at a small thickness of 2.0 mm. Nitrogen sorption and small-angle neutron scattering revealed the evolution of a nanoporous structure as the synthesis temperature increased, based on which a correlation between nanoporosity and EM wave absorption performance was established. This study illustrated that porosity should be kept at a moderate level for highly efficient EM wave absorption.
引用
收藏
页码：319 / 327
页数：9
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