Enhanced electromagnetic wave absorption of nitrogen-doped reduced graphene oxide aerogels with LaFeO3 cluster modifications

被引：37

作者：

Fu, Kaili ^{[1
,2
]}

Zhao, Jinbo ^{[3
]}

Liu, Fei ^{[1
,2
]}

Wu, Lili ^{[1
,2
]}

Jin, Zhidong ^{[1
,2
]}

Yang, Yunfei ^{[1
,2
]}

Qiao, Jing ^{[1
,2
]}

Wang, Zhou ^{[1
,2
]}

Wang, Fenglong ^{[1
,2
]}

Liu, Jiurong ^{[1
,2
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China

[2] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China

[3] Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Jinan 250353, Shandong, Peoples R China

来源：

CARBON | 2023年 / 210卷

基金：

中国国家自然科学基金;

关键词：

Nitrogen; -doped; Reduced graphene oxide aerogel; Interfacial polarization; Broadband microwave absorption; LaFeO3; MICROWAVE-ABSORPTION; COMPOSITE MICROSPHERES; THIN-FILMS; CARBON; PERFORMANCE; FABRICATION; PROPERTY; NANOCOMPOSITES; NANOSHEETS; NANOTUBES;

D O I：

10.1016/j.carbon.2023.118071

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：

Today, electromagnetic wave (EMW) absorbing materials with strong absorption capacity alone are hardly enough to meet the growing problem of EMW pollution. This work is the first designs and synthesizes LaFeO3- decorated nitrogen (N)-doped reduced graphene oxide aerogel (LFO/N-rGO) novel composites by a simple hy-drothermal method. When the mass ratio of the LaFeO3 (LFO) nanoparticles: graphene oxide (GO): urea is 1:5:7.5, LFO/N-rGO achieves broadband absorption while possessing strong electromagnetic wave absorption capability. A strong reflection loss (RL) of-64.5 dB is obtained at 9.2 GHz. In addition, the maximum effective absorption bandwidth with a 2.83 mm thickness can reach up to 6.72 GHz. The EMW absorption mechanism analysis shows that the excellent microwave absorption capability is mainly attributed to the enhanced multiple reflections and multi-scattering, enhanced interfacial polarization process, proper conduction loss, and optimized impedance matching characteristics. Herein, this work proposes a new approach to improve the microwave absorption capability of N-doped reduced graphene oxide-based composites and provides a novel strategy to design EMW absorbing materials with wide effective absorption bandwidth and strong absorption capacity.

引用

页数：13

共 77 条

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