Introduction of dielectric phthalocyanine copper into nano-structure Fe3O4 for excellent microwave absorption

Abstract

Phthalocyanine copper/magnetite (CuPc/Fe3O4) magnetic nanohybrids were synthesized from CuPc and FeCl3·6H2O via a facile solvent-thermal route. The nanohybrids were monodispersed solid nanospheres and the diameter can be adjusted by polymerization degree of CuPc. Importantly, the as-prepared CuPc/Fe3O4 nanohybrids showed excellent microwave absorption properties due to the introduction of dielectric CuPc. A reflection loss ≤−5dB from 10.0GHz to 18.0GHz with multi-frequency microwave absorption was exhibited, and the maximum reflection loss reached to −32.96dB at 14.50GHz. Furthermore, the microwave absorption property can be tuned easily by varying polymerization degree of CuPc and the layer thickness of the samples, respectively. Thus, these results offered a promising strategy for the fabrication of absorbents for thin-thickness and strong-absorption microwave absorbing materials with working frequencies adjustable over a wide range.