Synthesis of zinc substituted cobalt ferrites via reverse micelle technique involving in situ template formation: A study on their structural, magnetic, optical and catalytic properties

Singh, Charanjit; Jauhar, Sheenu; Kumar, Vinod; Singh, Jagdish; Singhal, Sonal

doi:10.1016/j.matchemphys.2015.02.046

Cited by 88 publications

(26 citation statements)

References 30 publications

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“…A variation of the lattice constant (a) and crystallite size (D XRD ) as a result of different ionic radii, Fe 3+ (tetra: 0.49; octa: 0.64Å), Zn 2+ (tetra: 0.60; octa:0.74 Å), Cu 2+ (tetra: 0.57; octa:0.73Å), Ni 2+ (tetra: 0.58; octa: 0.69 Å), and Co 2+ (tetra: 0.58; octa: 0.74Å) was remarked [12,17]. The expansion of unit cell by the partial substitution of Co 2 with Zn 2+ , Ni 2+ , and Cu 2+ ions [20] could provide a possible explanation. The lattice constant (a) of CFO increases while the physical density (d p ) decreases by doping with Zn +2 , Ni 2+ , and Cu 2+ ions.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 92%

Influence of Cu2+, Ni2+, and Zn2+ Ions Doping on the Structure, Morphology, and Magnetic Properties of Co-Ferrite Embedded in SiO2 Matrix Obtained by an Innovative Sol-Gel Route

et al. 2020

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This paper presents the synthesis of metal doped Co ferrites, M0.2Co0.8Fe2O4 (M = Cu2+, Ni2+, and Zn2+) embedded in SiO2 matrix by an innovative sol-gel route. The structural and morphological characterization provided information about the crystalline phases, crystallite size, and the shape of the prepared ferrites. The thermal study depicted the thermal decomposition and stability of the obtained ferrites. X-ray diffraction indicated nanocrystalline ferrites with spinel structure and the lack of crystalline phase impurities, while Fourier transform infrared spectroscopy revealed the presence of functional groups in precursors and ferrite powders. The lattice parameters showed a gradual increase indicating a uniform distribution of divalent metal ions in the Co ferrite lattice. The crystallite size, magnetic moment, super-exchange and deflection of magnetic domain were influenced by the dopant metal ion. The room temperature magnetization indicated a ferromagnetic behavior of the ferrites annealed at 1000 °C and a superparamagnetic behavior of the ferrites annealed at 700 °C.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 92%

Influence of Cu2+, Ni2+, and Zn2+ Ions Doping on the Structure, Morphology, and Magnetic Properties of Co-Ferrite Embedded in SiO2 Matrix Obtained by an Innovative Sol-Gel Route

et al. 2020

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“…This could be explained on the basis of Bragg's equation (nλ= 2dsinθ). According to which, interatomic distance (d) is inversely proportional to the angle (θ).Therefore, as the ionic size increases, interatomic distance (d) increases i.e expansion of unit cell takes place and hence lattice parameter increases and 2θ value decreases 27 .…”

Section: Powder X-ray Diffraction (Xrd) Studiesmentioning

confidence: 99%

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

Goyal

Kapoor

Samuel

et al. 2016

Analytical Chemistry Letters

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Of recently, magnetic nano-ferrites have come forward as excellent catalysts for various organic transformations and mitigation of environmental deterioration. In the present investigation, attempts have been made to beneficially modify nickel ferrite nanoparticles by substituting various transition metal ions in to its lattice for catalytic applications. Synthesis of various modified nickel ferrite (NiM 0.2 Fe 1.8 O 4 (M=Cr, Mn, Fe, Co, Ni, Cu and Zn) nanocatalysts have been carried out employing sol-gel methodology. Catalytic activity of the synthesized nanocatalysts have been evaluated both for the reduction of nitroaromatic compounds and for the deterioration of hazardous dyes. The catalytic performance of all the synthesized compositions have been found to follow the order-Mn > Cu > Co > Fe > Cr > Ni > Zn. The observed order of catalytic efficiency has also been confirmed from the completion time and rate constant values for both the catalytic reactions.

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“…Therefore, CoZn ferrites have attained very interest basis to the distinctive and varies properties of ZnFe2O4 and CoFe2O4 so they have excellent electromagnetic characterization and physical/chemical stability [13,14]. They can be used as active material in energy storage supercapacity, magnetic record medium, microwave absorption compounds and catalysis [15][16][17][18][19]. Waje et al fabricated Co0.5Zn0.5Fe2O4 using mechanically alloyed and they studied influence of sintering temperature on its magnetic characterization [20].…”

Section: Introductionmentioning

confidence: 99%

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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Synthesis of zinc substituted cobalt ferrites via reverse micelle technique involving in situ template formation: A study on their structural, magnetic, optical and catalytic properties

Cited by 88 publications

References 30 publications

Influence of Cu2+, Ni2+, and Zn2+ Ions Doping on the Structure, Morphology, and Magnetic Properties of Co-Ferrite Embedded in SiO2 Matrix Obtained by an Innovative Sol-Gel Route

Influence of Cu2+, Ni2+, and Zn2+ Ions Doping on the Structure, Morphology, and Magnetic Properties of Co-Ferrite Embedded in SiO2 Matrix Obtained by an Innovative Sol-Gel Route

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

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

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