Synthesis of covalently bonded reduced graphene oxide-Fe3O4 nanocomposites for efficient electromagnetic wave absorption
Synthesis of covalently bonded reduced graphene oxide-Fe3O4 nanocomposites for efficient electromagnetic wave absorption
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DOI：
10.1016/j.jmst.2020.09.012
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发表时间：
2021-05-10
影响因子：
10.9
通讯作者：
Li, Tiehu
中科院分区：
文献类型：
--
作者：
Liu, Xudong;Huang, Ying;Li, Tiehu
通过水热反应、酰胺化反应和还原反应合成了高性能电磁波吸收剂--共价键合还原氧化石墨烯-Fe 3 O 4纳米复合材料（rGO-Fe 3 O 4）。对rGO-Fe 3 O 4纳米复合材料的微观结构、表面元素组成和形貌进行了表征，并对相应的电磁波吸收性能进行了详细分析。结果表明，Fe 3 O 4纳米粒子通过酰胺键成功地接枝到石墨烯上。当rGO与Fe 3 O 4的质量比为2：1（样品S2）时，该吸收体表现出优异的电磁波吸收性能，在14.4 GHz处的最大反射损耗（RL）达到-48.6 dB，而有效吸收带宽（RL
High-performance electromagnetic (EM) wave absorbers, covalently bonded reduced graphene oxide-Fe3O4 nanocomposites (rGO-Fe3O4), are synthesized via hydrothermal reaction, amidation reaction and reduction process. The microstructure, surface element composition and morphology of rGO-Fe3O4 nanocomposites are characterized and corresponding EM wave absorption properties are analyzed in great detail. It demonstrates that Fe3O4 nanoparticles are successfully covalently grafted onto graphene by amide bonds. When the mass ratio of rGO and Fe3O4 is 2:1 (sample S2), the absorber exhibits the excellent EM wave absorption performance that the maximum reflection loss (RL) reaches up to -48.6 dB at 14.4 GHz, while the effective absorption bandwidth (RL