α-Fe2O3 Phase Research Articles

Morphological, Magnetic and Optical Properties of α-Fe₂O₃ Nanoflowers.

We report the morphological, structural and magnetic properties of the flower like iron oxide α-Fe2O3 samples prepared by the polyol method. The α-Fe2O3 samples were prepared by using different amount of the iron chloride in the starting materials and the impact of the different iron chloride amount on the morphology of the precursor and after heat treatment of the samples was investigated. The X-ray diffraction (XRD) analysis confirmed the formation of the α-Fe2O3 phase without detecting any impurity phase. The transmission electron microscopy (TEM) and the field emission scanning electron microscopy (FESEM) results showed that the flower like structures are composed of nanopetals with an average thickness and width of 60 nm and 735 nm respectively. A strong impact on the formation of the flower like iron oxide and the morphologies of these samples was observed with the variation of iron chloride concentration during synthesis process. The magnetic hysteresis measurements demonstrated that as prepared samples displayed ferromagnetic behavior and magnetic properties were found to be depending on the morphologies of as-prepared samples. The band gap energy was measured by using Tauc's method, and values for all the samples were found to be in the range 1.94-2.27 eV. The results obtained in the present work show that the α-Fe2O3 can be used as potential candidate material for use in gas sensors, photocatalysis and energy storage devices.

Magnetic properties α-Fe2O3Filled MWNT/PolyVinyl Alcohol Composites Film

Magnetic properties of α-Fe2O3 partly filled MWNT/Polyvinyl Alcohol (PVA) composites film have been studied by Raman spectroscopy, Fourier Transform InfraRed (FTIR) spectroscopy, Transmission Electron Microscopy (TEM), Vibrating Sample Magnetometer (VSM), Four Point Probe (FPP). The Composite films were prepared by simply mixing between α-Fe2O3 –filled Multiwalled Carbon Nanotube(MWNT) dispersed in Sodium Dodecyl Sulphate (SDS) with 10% PVA solution for 4 variation concentration with a total volume 5 ml. The result of Raman Spectroscopy on precursor sample showing the existence of α-Fe2O3 phase and MWNT. From FTIR spectroscopy on the film samples observed the attachment of the PVA with iron oxide and MWNT. The paramagnetic properties of the samples film were investigated by means of Vibrating Sample Magnetometer (VSM). The higher value of magnetoresistanceratiowas +40% on the sample with percolation threshold Pc = 0.51 wt%. The interaction between α-Fe2O3 filled MWNT in matrix polymer PVA made shrinkage or decreased the localization length inside the grain of composites film.

Synthesis and characterization of graphene modified by iron oxide nanoparticles

The process of interaction of graphene with iron oxide nanoparticles was investigated. First, graphene oxide (GO) modified with magnetite Fe3O4 nanoparticles was successfully synthesized. Raman and Mössbauer spectroscopy revealed that the magnetite Fe3O4 in combination with GO became non-stoichiometric, and the maghemite phase γ-Fe2O3 appears. Subsequent reduction of graphene oxide by thermal treatment leads to an increase in the fraction of maghemite content and, in addition, the hematite phase α-Fe2O3 appears in the sample annealed at above 500 °C. Meanwhile, the core-shell nanocomposites of FexOy/G appear, were FexOy consists of a mixture of the Fe3O4, γ-Fe2O3 and α-Fe2O3 phases. The content of each phase can be varied by the annealing temperature. Magnetic, Mössbauer and Raman spectroscopy measurements indicate that graphene can interact with iron oxide. Charge-transfer from iron to graphene can occur due to delocalization of 3d electrons, which reduces the overall magnetic moment of the charge-transfer complexes. These properties can have potential applications in electronic such as supercapacitors, advanced anode materials for lithium-ion batteries, magnetically targeted drug delivery, photothermic therapy, and magnetic resonance imaging.

Phase identification in binary mixture of nanopowders from deconvoluted valence band spectra using X-ray photoelectron spectroscopy: Case study with iron oxide and titania polymorphs

We propose a new method of quantifying the phases present in a binary mixture of nanopowder from deconvoluted valence band spectra using X-ray photoelectron spectroscopy (XPS). Polymorphs of iron oxide (γ-Fe2O3 and α-Fe2O3) and titania (anatase and rutile TiO2) nanopowders containing different weight percentages of the polymorphs were chosen for the present study. Pure iron oxide nanopowder (Fe3O4) was prepared by co-precipitation and was air annealed at 250 and 700 °C to obtain γ-Fe2O3 and α-Fe2O3 phases, respectively. In addition, anatase and rutile TiO2 were also used in the present study. A linear correlation between the percentage of the phase and the valance band peak area was observed in both the cases. The phase compositions of the nanopowder mixtures identified from the valence band spectra were compared with that of the X-ray Diffraction (XRD) data and the results were found to be in good agreement with each other. For nanoparticles of size >30 nm, no size dependent effect was observed in determining the phase composition but for particle size below 10 nm, size was found to have a detrimental role. These results showed that the phases of polymorphs can be quantified from XPS valence band analysis.

Sonochemical-Assisted In Situ Electrochemical Synthesis of Ag/α-Fe2O3/TiO2 Nanoarrays to Harness Energy from Photoelectrochemical Water Splitting

Numerous protocols in heterostructure engineering hold promise for effectively improving the optical properties of nanomaterials for energy-harvesting applications. In this work, we successfully fabricated Ag/α-Fe2O3/TiO2 heterostructures via electrochemical anodization assisted by pulse sonication. The morphological features of the silver (Ag) deposited on α-Fe2O3/TiO2 showed a layered distribution of the α-Fe2O3 nanoparticles (NPs) over the TiO2 nanotube arrays (NTAs), whereas Ag existed in a pseudocubical form. X-ray diffraction (XRD) patterns and X-ray photoelectron spectrometer (XPS) analysis validated the formation of α-Fe2O3 and anatase TiO2 crystalline phases and Ag/α-Fe2O3/TiO2 heterostructure. The diffuse reflectance spectroscopy (DRS) UV–vis spectroscopy results displayed a gradual decrease in the band gap with enhanced absorption in the visible region of the spectrum due to optically active heterostructure formation in the order Ag/α-Fe2O3/TiO2 (470 nm) > α-Fe2O3/TiO2 (424 nm) > TiO2 (386 nm)....

Phase control and enhanced gas sensing properties of metastable ϵ-Fe2O3

ABSTRACTDifferent phase structures (α-Fe2O3, γ-Fe2O3 and ϵ-Fe2O3) of iron oxides (Fe2O3) were prepared by the same method- a combination method of reverse-micelle and sol-gel. The phase structures were controlled by adding different ionic additives (Na+ and Ba2+). The as-synthesized α-Fe2O3, γ-Fe2O3 and ϵ-Fe2O3 samples were investigated and discussed using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and an intelligent gas sensing analysis system. Interestingly, metastable ϵ-Fe2O3 showed an excellent selectivity for n-butanol, compared with the stable phases of α-Fe2O3 and γ-Fe2O3. It indicates that nanostructure ϵ-Fe2O3 could be a valuable material for the fabrication of advanced sensing devices.

Silica-free hydrothermal synthesis of ε-Fe2O3 nanoparticles and their oriented attachment to nanoflakes with unique magnetism evolution

It is a general consensus that ε-polymorph of Fe2O3 is not easy to synthesize in the form of bare nano-sized objects owing to its significant thermal instability. Thus, a supporting medium (e.g., silica matrix in most cases) is always necessary for its successful high-temperature synthesis at the sacrifice of its yield. In this study, optimized amounts of protons and nitrate ions were employed in a hydrothermal synthetic route to facilitate the growth of pure ε-Fe2O3 nanoparticles. The absence of silica matrix ensured a high yield of ε-Fe2O3 product, and moderate reaction temperature of mere 200 °C was conducive to its scalable energy-efficient production. These ε-Fe2O3 nanoparticles exhibited large room-temperature coercivity of ca. 16.3 kOe, which was found to be degenerated to 36 Oe as prolonging the reaction time due to the phase and structure evolution. The preformed ε-Fe2O3 nanoparticles and post-formed α-Fe2O3 phase would co-align with each other to form nanoflakes for long-time reaction, being of a character of oriented attachment. The concomitant distorted lattice spacing and disordered atomic configuration not only contributed to the degeneration of ferromagnetism of ε-Fe2O3 phase, but also induced unique spin glass behavior.

Micro-structural study of colored porcelains of Changsha kiln using imaging and spectroscopic techniques

Changsha kiln was an ancient factory from the Tang Dynasty (618–907 CE) to the Five Dynasties (907–960 CE), famous for its colored porcelain production. It was one of the pioneer sites to master the poly-color technique at high temperature. In this work, by using Energy Dispersive X-Ray Fluorescence (EDXRF), Raman spectroscopy and Scanning Electron Microscopy Energy Dispersive X-ray Spectrometer (SEM-EDS), the composition and structure of two of its emblematic colored glazes were studied. The results confirmed that the chromogenic elements of brown and green colored glazes are well iron and copper respectively. They also revealed a significant presence of hematite (α-Fe2O3) phase with dendritic shape close to the glaze surface and oddly a substantial amount of ε-Fe2O3 phase at the body/glaze interface. It is the second type of ancient Chinese glaze in which the very rare and metastable iron(III) oxide polymorph was found. No Cu-based particle was identified in green glaze. The green color is certainly due to Cu2+ dispersed in the glassy matrix. Our study confirmed that Cassiterite (SnO2) was used as opacifier compound to obtain opaque green color.

Structural, magnetic and dielectric properties of Co-Zr substituted M-type calcium hexagonal ferrite nanoparticles in the presence of α-Fe2O3 phase

Polycrystalline nanoparticles of M-type Ca(ZrCo)xFe12−2xO19 (0.0 ≤ x ≤ 1.0) hexaferrites were prepared using a simple heat treatment method at a low heating temperature of 650 °C. Effect of cobalt-zirconium substitution on the structural, microstructural, magnetic and dielectric properties was investigated. XRD analysis indicates that all the samples possess a hexagonal structure with anti-ferromagnetic α-Fe2O3 phase. The values of lattice parameters and cell volume found to be increased with increasing the cobalt-zirconium substitution along with the amount of α-Fe2O3 phase. Crystal symmetry has not affected by Zr–Co substitution in prepared calcium hexaferrite samples but the position of diffraction peak [108] is found to shift towards a lower angle as an increase in the substitution of Zr–Co. The crystallite size found to vary between 12 and 17 nm. SEM images show agglomerated grains and surface morphology has changed with Zr–Co substitution. EDX analysis of typical samples revealed the presence of Ca, Fe, Co, Zr. The magnetic analysis revealed the formation of multi-domain structure. Room temperature Mössbauer spectra of prepared samples show that all five sextets are merged together with a paramagnetic doublet and it confirmed that the size of particles is very small in the nano range. Single and double semicircle arcs were observed in Cole-Cole plots, due to the contributions of grain and grain boundaries resistance.

Nanostructured α-Fe2O3 derived from siderite as an effective Hg(II) adsorbent: Performance and mechanism

Nanoparticle α-Fe2O3 was prepared by thermal treatment of siderite and utilized to adsorb Hg(II) from an aqueous solution. The physicochemical properties and Hg(II) adsorption capacities of this α-Fe2O3 phase were investigated by various characterization techniques and batch equilibrium experiments. The nanostructured α-Fe2O3 of charge S-500 revealed the best adsorption capacity due to its larger specific surface area (50 m2 g−1) and smaller average pore size (7.3 nm). The maximum Hg(II) sorption capacity of S-500 was calculated from the Langmuir model to be 11.2 mg/g at pH = 6 and T = 303 K. The sorption of Hg(II) at pH < 6.0 could be attributed to the outer-sphere surface complexation, whereas the formation of inner-sphere surface complexation dominated the Hg(II) sorption at higher pH. For the latter, FT-IR and XPS analysis demonstrated that hydroxyl groups on the surface of S-500 are involved in the efficient removal of Hg(II) from aqueous solutions. These results provide an cost-effective method for the comprehensive utilization of siderite rock resources in environmental remediation.

Structural and electron spin resonance spectroscopic studies of MnxZn1−xFe2O4 (x = 0.5, 0.6, 0.7) nanoferrites synthesized by sol-gel auto combustion method

Nanoferrites with the chemical equation MnxZn1−xFe2O4 (x = 0.5, 0.6, 0.7) were prepared by sol-gel auto combustion method in order to study their structural, elastic and electron magnetic resonance properties. The Bragg reflections in the X-ray diffractograms matched with the formation of cubic spinel phase along with the secondary phases of α-Fe2O3 and Mn2O3. The uneven variation of lattice parameter was found to be depending on the possible cation redistribution in the spinel structure/or grain sizes. From the histograms of SEM studies, the composition x = 0.6 comparatively has a narrow distribution of grain sizes (5–11 μm) than those of compositions x = 0.5 (3.5–8.5 μm) and x = 0.7 (2.5–8.5 μm). The higher and lower vibrational frequencies in the FTIR spectra occurred around 560 cm−1 and 470 cm−1 confirm the cubic spinel phase of present ferrite systems in the line of XRD confirmation. The change in the vibrational frequencies supports the variation of lattice parameter. The variation of lattice energy is supportive for the elastic properties, but not to the structural parameters. The same value of Poisson’s ratio (∼0.35) for the three compositions is an indicative, representing the isotropic behaviour of spinel ferrite systems. The range (2.012–2.106) of Lande’s g-parameter indicates the change in Fe3+–O–Fe3+ superexchange interaction. The results are interpreted based on the possible cation redistribution, the secondary phases presuming the core-shell interactions.

Influence of Nd-NbZn co-substitution on structural, spectral and magnetic properties of M-type calcium-strontium hexaferrites Ca0.4Sr0.6-xNdxFe12.0-x(Nb0.5Zn0.5)xO19

This is first report on Nd-NbZn co-substituted M-type Ca-Sr hexaferrites with nominal compositions Ca0.4Sr0.6-xNdxFe12.0-x(Nb0.5Zn0.5)xO19 (x = 0.00–0.32) fabricated by the conventional solid-state reaction method. X-ray diffractometer (XRD), Fourier transformer infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM), physical property measurement system-vibrating sample magnetometer (PPMS-VSM) were employed to characterize M-type calcium-strontium hexaferrites. XRD patterns of the hexaferrites with Nd-NbZn content (x) of 0.00 ≤ x ≤ 0.16 showed the single M-type hexaferrite phase. However, for the hexaferrites with Nd-NbZn content (x) ≥ 0.24, the impurity phase (α-Fe2O3) was observed. FT-IR frequency bands in the range (592–613) cm−1 and (430–470) cm−1 corresponded to the formation of tetrahedral and octahedral clusters of metal oxides in the hexaferrites, respectively. FE-SEM micrographs showed that the grains were platelet-like shapes. The saturation magnetization (Ms) and magneton number (nB) decreased with increasing Nd-NbZn content (x) from 0.00 to 0.32. The remanent magnetization (Mr) first increased with Nd-NbZn content (x) from 0.00 to 0.08, and then decreased when Nd-NbZn content (x) ≥ 0.08. The Mr/Ms ratio, coercivity (Hc) and magnetic anisotropy field (Ha) increased with increasing Nd-NbZn content (x) from 0.00 to 0.32. First anisotropy constant (K1) first slightly increased with Nd-NbZn content (x) from 0.00 to 0.08, and then decreased when Nd-NbZn content (x) ≥ 0.08.

Fabrication and characterization of the magnetic ferrite nanofibers by electrospinning process

Since the magnetic properties of materials are greatly affected by their microstructure, nanostructuring of magnetic materials is attempted in various directions. Various processes have been used to synthesis one dimensional nanomaterials: template, hydrothermal, anodizing, and electrospinning. Among these processes, nanofibers fabricated by the electrospinning method are excellent for reproducibility and have a large aspect ratio. In addition, there have been many attempts to fabricate ceramic nanofibers with a more intricate shape using a sol-gel reaction. In this study, the electrospinning conditions for synthesizing ferrite (α-Fe2O3) nanofiber were optimized by the preliminary results of polyvinyl alcohol (PVA) nanofiber. As-spun composite nanofibers of PVA/Fe(NO3)3·9H2O were transformed to an α-Fe2O3 phase by heat treatment at 550 °C. After heat treatment, the diameters ranged from 105 nm to 124 nm in as-spun composite nanofibers, and with a decrease in PVA content after heat treatment, the diameters ranged from 59 nm to 96 nm. We investigated the magnetization properties with the microstructure of α-Fe2O3 nanofiber by a vibrating sample magnetometer. The saturation magnetization increased with an increasing diameter of the α-Fe2O3 nanofiber, and highest value of 26.2 A·m2/kg was measured in the α-Fe2O3 nanofibers with the largest diameter with a PVA content of 0.12 g/ml. The microstructure and magnetic properties of the α-Fe2O3 nanofibers were controlled by an electrospinning process, and we were able to optimize the α-Fe2O3 nanofibers for various application fields, such as electromagnetic interference and electromagnetic pulse absorbers.

Effect of chloride ion on crystalline phase transition of iron oxide produced by ultrasonic spray pyrolysis

Ultrafine spherical Fe2O3 powders with controllable morphology and crystal phase were synthesized by ultrasonic spray pyrolysis. In this experiment, we chose three common ferric salts (Fe(NO3)3·9H2O, FeSO4·7H2O or FeCl2·4H2O) as precursor solution and regulated the concentration of chlorine ion (Cl−) in precursor solution to produce Fe2O3 particles. The morphology, crystal structure and magnetic property of prepared Fe2O3 particles were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Vibrating sample magnetometer (VSM). The diameter of the obtained Fe2O3 products ranged from 0.2 to 2 μm. And the product obtained from FeCl2 precursor solution was magnetic, which was composed of hexagonal α-Fe2O3 and cubic γ-Fe2O3 from XRD results. We also calculated the weight percent of α-Fe2O3 and γ-Fe2O3 in the product through XRD quantitative analysis. However, with the addition of Cl− in Fe(NO3)3 or FeSO4 precursor solution, the products turned from non-magnetic to magnetic, whose pure α-Fe2O3 phase became to α-Fe2O3 and γ-Fe2O3 multi-phase. Besides, the weight percent of γ-Fe2O3 and the amount of Ms increased with the Cl− concentration in precursor solution improving. According to the research, it can be inferred that the presence of Cl− inhibits the phase transition of γ-Fe2O3 to α-Fe2O3 at high temperature.

Fabrication and characterization of Ba3Zn2Fe24O41 (Zn2Z) hexaferrites films on silicon substrates

We report the fabrication and characterization of Ba3Zn2Fe24O41 (Zn2Z) hexaferrite films on silicon substrates using a simple sol-gel drop casting method. A combination of X-ray diffraction (XRD), scanning electron microscope (SEM), grazing incidence wide angle X-ray scattering (GIWAXS) and vibrating sample magnetometer (VSM) was used to characterize the structural and magnetic properties of the films. The XRD results confirmed the formation of the Z-type hexaferrite with some ZnFe2O4 and α-Fe2O3 phases. SEM images showed several micron-size platelet-like hexagonal crystals with nanocrystals grown onto their surfaces. Interestingly, a few regions of the film exhibit self-assembly of the nanocrystals in ordered patterns. GIWAXS measurements indicated that the crystals are not randomly oriented within the film. The magnetic results revealed typical characteristics of a soft magnetic material consistent with the Z-type characteristics. The magnetization did not reach saturation up to the maximum applied field of 6 kOe. The saturation magnetization obtained with the field applied perpendicular to the film plane was found to be lower than that for a parallel geometry.

Structural and thermoelectric properties of hydrothermal-processed Ag-doped Fe2O3

Fe2-xAgxO3 (0 ≤ x ≤ 0.04) nanopowders with various Ag contents were synthesized at different hydrothermal reaction temperatures (150 °C and 180 °C). Their structural properties were fully investigated through an X-ray diffraction, a Fourier transform infrared spectroscopy, and an X-ray photoelectron spectroscopy. The hydrothermal reaction temperature, time, and Ag content remarkably affected the morphological characteristics and crystal structure of the synthesized powders. The Fe2-xAgxO3 (0 ≤ x ≤ 0.04) powders synthesized at 150 °C for 6 h and the Fe2-xAgxO3 (0.02 ≤ x ≤ 0.04) powders synthesized at 180 °C for 12 h formed the orthorhombic α-FeOOH phase with a rod-like morphology, whereas the Fe2-xAgxO3 (0 ≤ x ≤ 0.01) powders synthesized at 180 °C for 12 h formed the rhombohedral α-Fe2O3 phase with a spherical-like morphology. The Fe1.98Ag0.02O3 fabricated by utilizing Fe1.98Ag0.02O3 powders synthesized at 180 °C showed the largest power factor (0.64 ×10−5 Wm−1 K−2) and dimensionless figure-of-merit (0.0036) at 800 °C.

Solution Combustion Synthesis of Fe3O4 Powders Using Mixture of CTAB and Citric Acid Fuels

Magnetite (Fe3O4) powders were synthesized by solution combustion method using a mixture of cetyltrimethylammonium bromide (CTAB) and citric acid fuels at various fuel to oxidant ratios (ϕ = 0.5, 1, 1.5, and 2). Phase evolution investigated by x-ray diffraction method showed single-phase Fe3O4 powders were only formed at ϕ = 1 using mixture of fuels, while impurity α-Fe2O3 phase together with magnetite phase was completely disappeared at ϕ = 2 for CTAB fuel alone. The specific surface area and porous structures of the as-combusted Fe3O4 powders were characterized by N2 adsorption-desorption isotherms and scanning electron microscopy techniques, respectively. The specific surface area using the mixture of fuels (37 m2/g) was higher than that of CTAB fuel alone (32 m2/g). Magnetic properties of the as-combusted powders were studied by vibration sample magnetometry method. The highest saturation magnetization of 83 emu/g was achieved by mixture of fuels at ϕ = 1, due to the high purity and large particle size.

Effect of phase transition induced by annealing temperature on wettability, optical and photocatalytic properties of nanostructured iron oxide thin film

Nanostructured iron oxide thin films were prepared by sol–gel method and spin coating technique. The structural properties of samples were extracted from X-ray diffraction. The results indicated that the sample contained both maghemite (γ-Fe2O3) and hematite (α-Fe2O3) phases at 300 °C annealing temperature. The remainder of the maghemite phase transformed entirely to hematite by increasing annealing temperature from 300 to 500 °C. Morphological analysis showed that roughness of surface increased by annealing temperature. Fractal dimension were calculated by two methods which for both of them, it increased by annealing temperature. According to the contact angle measurement, the hydrophilic behavior converts to hydrophobic feature by changing the maghemite phase to hematite. The transparency and band gap of films decreased by phase transition from γ to α. Degradation of Rhodamine B and Methylene blue dyes with iron oxide were investigated. Increasing the annealing temperature enhanced the photocatalytic behavior due to the band gap narrowing induced by phase transition and α-Fe2O3 had the best photocatalytic degradation of MB which was reached to 95.4% in 120 min. under visible light irradiation. Whereas it exceeded than 98.6% for RhB in 135 min.

Solution combustion synthesis of CoFe2O4 powders using mixture of CTAB and glycine fuels

Cobalt ferrite (CoFe2O4) powders were synthesized by solution combustion method using a mixture of cetyltrimethylammonium bromide (CTAB) and glycine fuels. The combustion behavior, phase evolution, microstructure, specific surface area, and magnetic properties were investigated by thermal analysis, infrared spectroscopy, X-ray diffractometry, nitrogen adsorption–desorption, electron microscopy, and vibrating sample magnetometry techniques. Single-phase CoFe2O4 powders were achieved by mixing of CTAB and glycine fuels, regardless of fuel content, while the impurity Co3O4 and α-Fe2O3 phases together with CoFe2O4 phase were disappeared at higher amounts of CTAB fuel. Bulky microstructure of the as-combusted powders using CTAB fuel with specific surface area of 43 m2/g was transformed to foamy and porous structure (196 m2/g) by means of the mixture of CTAB and glycine fuels. Furthermore, the solution combusted CoFe2O4 powders using mixture of CTAB and glycine fuels exhibited the higher saturation magnetization due to their higher crystallinity and particle size.

Surface functionalization of GO with MgO/MgFe2O4 binary oxides: A novel magnetic nanoadsorbent for removal of fluoride ions

In the present works, we have successfully synthesized novel magnetic MgO-MgFe2O4 nanocomposite anchored onto graphene oxide (GO) substrate (MgO-MgFe2O4/GO) and MgO-Fe2O3 nanocomposite by hydrothermal methods. The prepared GO based nanocomposites were used as efficient adsorbents for removal of fluoride ions from aqueous system. The formation, morphology, size, crystalline phases, surface area and magnetic behaviors of these prepared nanocomposites were characterized by FE-SEM, HR-TEM, XRD, FT-IR, Raman, BET and VSM analytical techniques. From XRD, confirmed that GO based nanocomposite achieved a magnetic performance by forming new spinel MgFe2O4 crystal structure instead of α-Fe2O3 phase. It was observed that presence of GO not only plays a significant role in the structural transformation but also enhance the surface area of the nanocomposites. Batch adsorption studies were carried out to investigate the influence of various parameters such as adsorbent dosage, contact time, pH and initial concentration of solution towards removal of fluoride ions. The maximum uptake capacity of MgO-MgFe2O4/GO for fluoride ions removal is found to be 34 mg g−1 which is higher as compared to that of MgO-Fe2O3. From the kinetic study, it is observed that the adsorption of fluoride ions onto the adsorbent surface follows pseudo second order kinetic equation and obeys the Langmuir isotherm model. Thermodynamic study indicates that the adsorption process was the endothermic in nature. The mechanism of adsorption of fluoride onto the adsorbent surface includes electrostatic interactions, anion exchange, and inner-sphere complexation.