Fabrication and electromagnetic properties of flowerbud-like CNT-CuPc/Fe3O4

Abstract

In this work, we report the facile fabrication of carbon nanotube–copper phthalocyanine/magnetite (CNT-CuPc/Fe3O4) and their excellent electromagnetic properties. The novel CNT-CuPc/Fe3O4 was fabricated from FeCl3⋅6H2O and CNT wrapped by CuPc via a facile two-step solvent-thermal route. Interesting, the composite showed the flowerbud-like morphology. Most importantly, the introduction of CuPc not only brought the strong interfacial interaction in CNT-CuPc/Fe3O4 but also improved their electromagnetic properties. Both dielectric loss value and magnetic loss value increased due to the existence of CuPc. Furthermore, the effective reflection loss value reached to −15.83dB at 6.28GHz with absorber thickness of 2.80mm, and the reflection loss value ⩽−10dB ranged from 4.7 to 7.8GHz by turning the thickness between 2.5 and 3.5mm. With the thickness increasing, single-peak turned into double-peaks. It revealed the excellent microwave-absorbing properties and the significant potential applications in nanoscience and nanotechnology.