Structural, morphological, magnetic properties and cation distribution of Ce and Sm co-substituted nano crystalline cobalt ferrite

Ahmad, Syed Ismail; Ansari, Shakeel Ahmed; Kumar, Deepak

doi:10.1016/j.matchemphys.2018.01.050

Cited by 103 publications

(20 citation statements)

References 22 publications

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“…Magnetic anisotropy constant (K) of the samples calculated using = . / /0.98 [67]. The correlation between K of CoZn ferrite samples and Zn 2+ ions content is plotted in Fig 17a.…”

Section: Magnetic Properties Of Cozn Ferrite Nano-particlesmentioning

confidence: 98%

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Kershi

Aldirham

2020

Preprint

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Magnetic Co ferrite nanoparticles doped with non-magnetic ions (Zn2+) fabricated by modified inverse coprecipitation technique. X-ray calculations show that the average crystallite size (D) and the average lattice constant (a) of CoZn ferrite nanoparticles increase from 32.33 to 52.87 nm and from 8.39 to 8.41Ǻ respectively with increasing non-magnetic Zn2+ ions from 0.00 to 0.55. Morphological forms and M-O at A and B sites studied by SEM and FT-IR spectroscopy. Measurements of the structural, optical, electrical and magnetic characterization of the CoZn ferrite nanoparticles strongly depend on non-magnetic Zn2+ ions content (y). Non-magnetic ions transform Co ferrite from hard and dielectric nature to soft and semiconductor nature. Values of Coercivity and the remanence decrease as non-magnetic Zn2+ ions increases to the minimum values 955 Oe and 6 emu /g for the sample with Zn = 0.55. Co0.45Zn0.55Fe2O4 is might be suitable for high-frequency applications where it has the smallest value of optical gap, the largest value of resistivity and the lowest value of dielectric loss factor.

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“…Magnetic anisotropy constant (K) of the samples calculated using = . / /0.98 [67]. The correlation between K of CoZn ferrite samples and Zn 2+ ions content is plotted in Fig 17a.…”

Section: Magnetic Properties Of Cozn Ferrite Nano-particlesmentioning

confidence: 98%

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Kershi

Aldirham

2020

Preprint

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“…The crystal structure and phase purity of CoFe1.9Zn0.1O4 NPs were characterized by X-ray powder diffraction (XRD) technique using a Philips-PW 1800 diffractometer with CuKα radiation (λ=1.54186 Å). The crystallite size (D), lattice parameters (α), unit cell volume (Vcell), the X-ray density (ρXDR) and the specific surface area (SXRD) of CoFe1.9Zn0.1O4 NPs were estimated using the following Equations [3,24];…”

Section: Characterization Of Cofe19zn01o4 Nanoparticlesmentioning

confidence: 99%

Untitled

2020

Chem. Methodol.

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In this study, Zn-substituted cobalt ferrite nanoparticles (CoFe1.9Zn0.1O4, CFZ) were successfully synthesized via a combined EDTA-citrate sol-gel process. The synthesized CoFe1.9Zn0.1O4 nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), point zero charge (pHpzc) and scanning electron microscopy (SEM). The adsorption experiments of methylene blue (MB) onto CFZ surface were conducted in batch mode. The experiments were conducted under different conditions (contact time, adsorbent dosage, initial pH solution, solution temperature and initial dye concentration). The experimental data were better fitted to pseudo-second-order (PSO) kinetic model (R 2 =0.9990). In addition, Langmuir isotherm (R 2 =0.9906) was the best model to describe the experimental adsorption data. The maximum adsorbed amount of MB (qmax) per unit mass of adsorbent was about 27.79 mg/g. The adsorption thermodynamics (i.e., ΔG°, ΔH°, ΔS°) revealed that the proposed adsorption process is feasible, spontaneous and exothermic in nature. The obtained results suggest that CFZ is a promising material used as an adsorbent for very toxic pollutants from aqueous solutions.

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“…The X-ray diffraction (XRD) pattern of CoFe1.9Zn0.1O4 magnetic nanoparticles (CFZ MNPs) was recorded at room temperature using a Philips -PW 1800 diffractometer with CuKα radiation (λ = 1.54186 Å). The crystallite size (D), lattice parameters ( ), unit cell volume ( ), the X-ray density ( ) and the specific surface area ( ) of CFZ MNPs were estimated using the following Equations [32,33]…”

Section: Characterizationmentioning

confidence: 99%

Oil Spill Removal from Water by Absorption on Zinc-Doped Cobalt Ferrite Magnetic Nanoparticles

et al. 2019

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In the present study, Zn-doped cobalt ferrite (CoFe1.9Zn0.1O4) magnetic nanoparticles were successfully synthesized via sol-gel method. The prepared materials were characterized using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The apparent density and magnetic force of CoFe1.9Zn0.1O4 nanoparticles were determined. The results revealed that the prepared materials display an adequate density and considerable magnetic force. The gravimetric oil removal capability tests were also performed to investigate the oil absorption properties of CoFe1.9Zn0.1O4 nanoparticles using four types of oil samples (crude, diesel, gasoline and hydraulic oil) as water pollutant's model. The oil removal capabilities of the prepared absorbent were found to be 13.72 ± 0.42-5.50 ± 0.53 g/g, 14.99 ± 0.95-8.86 ± 0.42 g/g, 18.23 ± 1.01-8.06 ± 1.26 g/g and 10.58 ± 0.49-5.24 ± 0.31 g/g for crude, diesel engine, gasoline engine and hydraulic oil, respectively. The results suggest that the prepared magnetic nanoparticles can be used as absorbent materials for removing oil spills from water surface. Magnetic nanomaterials Spinel ferrite nanoparticles Oil spills Gravimetric oil removal

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Structural, morphological, magnetic properties and cation distribution of Ce and Sm co-substituted nano crystalline cobalt ferrite

Cited by 103 publications

References 22 publications

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Untitled

Oil Spill Removal from Water by Absorption on Zinc-Doped Cobalt Ferrite Magnetic Nanoparticles

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