A self-assembly of graphene oxide@Fe3O4/metallo-phthalocyanine nanohybrid materials: synthesis, characterization, dielectric and thermal properties

Abstract

In this work, we report the synthesis of novel inorganic-organic hybrid nanomaterials (GO@Fe 3 O 4 /CuPc) and GO@Fe 3 O 4 /ZnPc) consisting of sheets of graphene oxide (GO) decorated by iron oxide nanoparticles (Fe 3 O 4 ), the whole heterostructure functionalized with metallo-phthalocyanines (MPc, M:Cu or Zn). First the synthesis of nanomaterial (GO@Fe 3 O 4 ) was prepared by hydrothermal self-assembly process through the mixture of graphene oxide and Fe ?2 /Fe ?3 salt solution. The metallo-phthalocyanines anchorage on the surface of nanosystem was lately performed by facile and effective ultrasonication method. The structure, composition and morphology of nanohybrids and intermediates were investigated by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, UV-visible spectroscopy, scanning and transmission electron microscopy and impedance spectroscopy. All the results suggested that iron-based nanoparticles were successfully deposited onto graphene oxide sheet networks in the form of Fe 3 O 4 , forming nanospheres, decreasing in lattice defects of the GO sheets and dramatically increasing the dielectric properties of nanosystems. Nanomaterials presented saturation magnetization in the 52-58 emu/g and superparamagnetic

Nanomaterials Based on Fe3O4 and Phthalocyanines Derived from Cashew Nut Shell Liquid

“…The magnetization curves are presented in Figure 5. The magnetization curves of all nanomaterials exhibited a magnetic response to magnetic field variation and a characteristic superparamagnetic behavior, as evidenced in other previous works [17,36]. The values of saturation magnetization (Ms) found for Fe 3 O 4 @OA/Pc, Fe 3 O 4 @OA/CoPc, Fe 3 O 4 @OA/ZnPc, Fe 3 O 4 @OA/CuPc and Fe 3 O 4 @OA/NiPc were about 16, 11, 5, 3 and 1 emu/g, respectively.…”

“…The preparation of new eco-friendly fine chemicals derived from renewable and natural sources is of great interest. In this sense, the synthesis of cardanol-based phthalocyanines has been described in the literature [15,16,17]. Cardanol is the main component of technical cashew nut shell liquid ( t -CNSL), obtained as a by-product during the industrial processing of cashew nut ( Anacardium occidentale L.).…”