Abstract

In this work, we report the synthesis of novel inorganic-organic hybrid nanomaterials(GO@Fe3O4/CuPc) and GO@Fe3O4/ZnPc) consisting of sheets of grapheneoxide (GO) decorated by iron oxide nanoparticles (Fe3O4), the wholeheterostructure functionalized with metallo-phthalocyanines (MPc, M:Cu orZn). First the synthesis of nanomaterial (GO@Fe3O4) was prepared byhydrothermal self-assembly process through the mixture of graphene oxide andFe?2/Fe?3 salt solution. The metallo-phthalocyanines anchorage on the surfaceof nanosystem was lately performed by facile and effective ultrasonicationmethod. The structure, composition and morphology of nanohybrids andintermediates were investigated by Fourier transform infrared spectroscopy,X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry,UV-visible spectroscopy, scanning and transmission electron microscopy andimpedance spectroscopy. All the results suggested that iron-based nanoparticleswere successfully deposited onto graphene oxide sheet networks in the form ofFe3O4, forming nanospheres, decreasing in lattice defects of the GO sheets anddramatically increasing the dielectric properties of nanosystems. Nanomaterialspresented saturation magnetization in the 52-58 emu/g and superparamagneticbehavior. It was observed that the values of dielectric constant decreased as afunction of the amount of phthalocyanines in the nanomaterials. Therefore,because of their versatile magnetic and dielectric performances, the novelsuperparamagnetic hybrid nanomaterials, herein described, can be consideredas potential for microwave devices.

Autore Pugliese

• Carbone Luigi

Tutti gli autori

• A.E. da Costa Junior ; J.P. Ferreira Mota ;S.M. Adriano Pontes ; F. J. Nogueira Maia ;Cl. da Silva Clemente ; P.B. Almeida Fechine ;F. Bohn ; A.J. Mangueira Sales ; A.S. Bezerra Sombra ;L. Carbone ; G. Mele ; D. Lomonaco ; S.E. Mazzetto

Titolo volume/Rivista

Journal of materials science

Anno di pubblicazione

2017

ISSN

0022-2461

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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