Embedding Multiple Magnetic Components in Carbon Nanostructures via Metal-Oxo Cluster Precursor for High-Efficiency Low-/Middle-Frequency Electromagnetic Wave Absorption

被引：17

作者：

Wang, Xin ^{[1
,2
]}

Ou, Pinxi ^{[1
,2
]}

Zheng, Qi ^{[1
,2
,3
]}

Wang, Lianjun ^{[1
,2
,3
]}

Jiang, Wan ^{[1
,2
,4
]}

机构：

[1] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[2] Donghua Univ, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China

[3] Donghua Univ, Engn Res Ctr Adv Glasses Mfg Technol, Minist Educ, Shanghai 201620, Peoples R China

[4] Donghua Univ, Inst Funct Mat, Shanghai 201620, Peoples R China

来源：

SMALL | 2024年 / 20卷 / 15期

基金：

中国国家自然科学基金;

关键词：

carbon composites; electromagnetic wave absorption; low/middle frequency; metal-oxo clusters; CORE-AT-SHELL; MICROWAVE-ABSORPTION; COMPOSITES; FE; GRAPHENE; NANOCOMPOSITES; NANOSPHERES; NANOSHEETS; DESIGN; MATRIX;

D O I：

10.1002/smll.202307473

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

With the advent of wireless technology, magnetic-carbon composites with strong electromagnetic wave (EMW) absorption capability in low-/middle-frequency range are highly desirable. However, it remains challenging for rational construction of such absorbers bearing multiple magnetic components that show uniform distribution and favorable magnetic loss. Herein, a facile metal-oxo cluster (MOC) precursor strategy is presented to produce high-efficiency magnetic carbon composites. Nanosized MOC Fe15 shelled with organic ligands is employed as a novel magnetic precursor, thus allowing in situ formation and uniform deposition of multicomponent magnetic Fe/Fe3O4@Fe3C and Fe/Fe3O4 nanoparticles on graphene oxides (GOs) and carbon nanotubes (CNTs), respectively. Owing to the good dispersity and efficient magnetic-dielectric synergy, quaternary Fe/Fe3O4@Fe3C-GO exhibits strong low-frequency absorption with RLmin of -53.5 dB at C-band and absorption bandwidth covering 3.44 GHz, while ultrahigh RLmin of -73.2 dB is achieved at X-band for ternary Fe/Fe3O4-CNT. The high performance for quaternary and ternary composites is further supported by the optimal specific EMW absorption performance (-15.7 dB mm-1 and -31.8 dB mm-1) and radar cross-section reduction (21.72 dB m2 and 34.37 dB m2). This work provides a new avenue for developing lightweight low-/middle-frequency EMW absorbers, and will inspire the investigation of more advanced EMW absorbers with multiple magnetic components and regulated microstructures. Metal-oxo cluster precursor strategy is proposed to construct magnetic-carbon composites with well-dispersed multiphase magnetic nanoparticles. Iron-oxo cluster Fe15 is selected as novel precursor and the derived Fe/Fe3O4@Fe3C-graphene oxide (GO) and Fe/Fe3O4-carbon nanotubes (CNT) exhibit high-efficiency microwave absorption at low-/middle-frequency due to dielectric-magnetic synergy arisen from multicomponent magnets and abundant heterointerfaces. This work opens up a novel method for designing low-/middle-frequency absorbers with high performance.image

引用

页数：13