Solution combustion synthesized NiFe2O4 / reduced graphene oxide composite nanomaterials: morphology and electrical conductivity

V. M. Boychuk; R.I. Zapukhlyak; R.G. Abaszade; V.O. Kotsyubynsky; M.A. Hodlevsky; B.I. Rachiy; L.V. Turovska; A.M. Dmytriv; S.V. Fedorchenko

doi:10.15330/pcss.23.4.815-824

Authors

V. M. Boychuk Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
R.I. Zapukhlyak Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
R.G. Abaszade Azerbaijan State Oil and Industry University, Baku, Azerbaijan
V.O. Kotsyubynsky Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
M.A. Hodlevsky Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
B.I. Rachiy Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
L.V. Turovska Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine
A.M. Dmytriv Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine
S.V. Fedorchenko Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.4.815-824

Keywords:

Nickel ferrite, graphene oxide, composite, Mossbauer spectroscopy, electrical conductivity

Abstract

Ultrafine NiFe₂O₄ (T0) and NiFe₂O₄ / rGO composites have been synthesized by solution combustion method. The presence of rGO in the composite (33 wt.% (T1) or 66 wt.% (T2)) causes a decrease in the average particle size of the oxide phase from 16 to 10-11 nm with their transition to superparamagnetic with a decrease in the mixed spinel inversion degree. The S_BET values for T1 and T2 are 180 and 315 m²/g, respectively, decreasing to 78 and 169 m²/g after annealing in the temperature range of 200-800°C. Both micro- and small mesopores (size of 2.0-4.5 nm) have been observed for samples T2, while samples T0 and T1 are mainly mesopores. The small polaron mechanism of electrical conductivity is observed for pure spinel, when the electron hopping charge transport prevails for NiFe₂O₄ / rGO composites. It can be assumed that the GO component lowers the combustion reaction temperature and prevents particle agglomeration.

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