An electrocatalyst for the hydrogen evolution reaction has been successfully synthesized from graphene oxide (GO) decorated with mesoporous NiFe2O4. A high catalytic activity performance was reached by using GCE surface as a conductor, and composite contained GO/NiFe2O4. Based on results, as-prepared exhibited overpotential HER of 36 mV vs. RHE at 10 mA current density, an electrochemical activ...

Iron–nickel spinel oxide NiFe2O4 nanoparticles have been prepared by the combination of chemical precipitation and subsequent mechanical milling. For comparison, their analogue obtained by thermal synthesis is also studied. Phase composition and structural properties of iron–nickel oxides are investigated by X-ray diffraction and Mössbauer spectroscopy. Their catalytic behavior in methanol deco...

Transition metal-doped ferrites are attractive candidates for a wide range of applications including catalysis and electronic and magnetic devices. Although their bulk characteristics are well-understood, very little is known about their surface properties at the molecular level. Here, we demonstrate high reactivity of NiFe2O4 (111) surfaces, a Nidoped ferrite, by elucidating the surface struct...

NiO and NiO-NiFe2O4, composite had been synthesized by the coprecipitation method characterized using XRD, FTIR, UV-DRS, SEM-EDS. The photocatalytic degradation performances of photocatalyst were investigated visible irradiation, in which Congo red dye was used as a model. process assessed through three variables: pH solution, initial concentration, irradiation time. removal efficiency 98.45% a...

In this study, NiFe2O4 nanoparticles (NiFe2O4 NPs) were prepared through co-precipitation method and subsequently used for the removal of Co(II) ions from aqueous solutions. The NiFe2O4 NPs were characterized by transmission electron microscopy (TEM), X-ray diffraction spectrometry (XRD), and Brunauer-Emmett-Teller (BET) surface area analysis. In batch tests, the effects of variables such as pH...

Abstract The comparison between NiFe 2 O 4 (co-precipitation) and @SiO (co-precipitation microemulsion) ferrite nanoparticles in their as-received annealed form is presented. structural characterization revealed the gradual crystallization of samples induced by thermal treatment. existence cubic inverse spinel structure with tetrahedral octahedral iron occupancy confirmed all comprehensive stud...

Nickel ferrite (NiFe2O4) nanopowder has been synthesized by a sol-gel auto-combustion process and further sintered at various sintering temperatures. The samples were characterized XRD, SEM VSM. Enhancement of apparent density the sample observed with increase in temperature great influence on magnetic dielectric properties NiFe2O4. results reveal that grain size increases increasing temperatur...

fuel cells, secondary batteries and capacitors are among many promising energy storage devices. in particular, supercapacitors have attracted much attention because of their long life cycle and high power density. graphene/nickel ferrite(g-nf) based supercapacitors were successfully fabricated through a one-step facile solvothermal route. effects of synthesis conditions i.e. solvothermal time a...


 Nickel ferrite (NiFe2O4) is one of the spinel nanoparticles that useful for scientific and technological, like biomedicine. This paper discusses synthesis NiFe2O4 by various methods. aims to find out most efficient method which are used as hyperthermia agents in The a literature study an article with publications from 1956-2018 discussing several methods syntheses, such sol-gel, hydrothe...