• 文献标题:   Phthalocyanine-mediated interfacial self-assembly of magnetic graphene nanocomposites toward low-frequency electromagnetic wave absorption
  • 文献类型:   Article
  • 作  者:   LIU CC, LIU SN, FENG XF, ZHU K, LIN G, BAI ZX, WANG LL, LIU XB
  • 作者关键词:   electromagnetic wave absorption, dielectricmagnetic nanocomposite, phthalocyanine, interfacial selfassembly, low frequency
  • 出版物名称:   CHEMICAL ENGINEERING JOURNAL
  • ISSN:   1385-8947 EI 1873-3212
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.1016/j.cej.2022.139483 EA OCT 2022
  • 出版年:   2023

▎ 摘  要

Exploring multi-component composite is promising for advanced electromagnetic wave (EMW) absorption ma-terials, yet challenged by balancing low-frequency absorption and cost-effective preparation mode. Herein, a series of dielectric-magnetic nanocomposites are fabricated as EMW absorbers via facile phthalocyanine-mediated interfacial self-assembly approach. Phthalocyanine could act as a functional reagent to modify mag-netic Fe3O4 nanosphere and guarantee the self-assembly with reduced graphene oxide nanosheet simultaneously. Owing to the flexible self-assembly, the as-synthesized ternary nanocomposite exhibits highly tunable EMW absorption performance toward low-frequency absorption. The minimum reflection loss reaches-49.0 dB (99.998 % wave absorption) simultaneously at a low frequency of 5.4 GHz and a high frequency of 8.3 GHz, which displays superb absorption efficiency in both the C band and X band. The phthalocyanine-mediated dielectric-magnetic synergy endows the nanocomposite with enhanced impedance matching and multiple dissipation pathways. This study demonstrates a convenient strategy for the rational design of low-frequency EMW absorbers with high-efficiency absorption.