Structural, magnetic and catalytical properties of cobalt ferrite nanoparticles dispersed in silica matrix

Bardapurkar, Pranav P.; Shewale, Sunil S.; Barde, Nilesh P.; Jadhav, K. M.

doi:10.1088/2053-1591/aafe32

Cited by 16 publications

(4 citation statements)

References 38 publications

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“…Similarly, as the magnetic nanoparticles are doped in diamagnetic matrix, a blockade is established between the external field and the magnetic material, thus decreasing the induced magnetization in the nanocomposite. The literature reveals that similar outcomes were obtained for cobalt ferrite nanoparticles dispersed in silica matrix [48].…”

Section: Resultssupporting

confidence: 68%

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

Khirade¹

2019

J Nanostruct Chem

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A novel 0.5(BaZrO 3)-0.5(CoFe 2 O 4) (BZ-CF) nanocomposite ceramics has been synthesized using sol-gel autocombustion and mixing technique. The structural analysis was carried out using X-ray diffraction (XRD) technique. The XRD pattern shows mixed perovskite and spinel ferrite phases with simple cubic structure for the BZ-CF nanocomposite. The calculated average crystallite size of the samples varies of the order of the nanoregime. The lattice parameter (a) and other structural parameter were obtained using XRD data and it is found that the structural data of pure parent ceramics were in the reported range. The surface morphology of grains of the present samples was examined using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The FESEM images show spherical particles with average grain size in the nanometer range. Compositional stoichiometry was confirmed by energy dispersive spectrum (EDX) analysis. Fourier-transform infrared spectra (FTIR) of barium zirconate (BZ) and cobalt ferrite (CF) confirmed the perovskite and spinel ferrite structure, respectively. However, the FTIR spectrum of BZ-CF nanocomposite confirmed the change in crystal structure due to mixed phases. The M-H curves recorded at room temperature using pulse field hysteresis loop tracer technique exhibits a weak hysteresis loop for BZ-CF nanocomposite, perfectly diamagnetic nature for BZ nanoceramics, and typical ferromagnetic hysteresis loop for pure CF nanoceramics.

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Section: Resultssupporting

confidence: 68%

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

Khirade¹

2019

J Nanostruct Chem

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“…Ferrite is one of the superior magnetic-based materials with diverse applications, both in the form of thin films and nanoparticles [1][2][3][4][5]. For ferrite-based nanoparticles, the synthesis route has been introduced since a decade ago [6][7][8][9]. However, to date, it is still a fascination in materials research as fabrication technology advances in realizing theoretical results [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Cation trivalent tune of crystalline structure and magnetic properties in coprecipitated cobalt ferrite nanoparticles

Prasetya

Setiyani²,

Utari³

et al. 2023

Mater. Res. Express

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CoFe2O4, CoBi0.1Fe1.9O4, CoLa0.1Fe1.9O4, and CoAl0.1Fe1.9O4 nanoparticles were successfully synthesized by the coprecipitation method. After annealing at 700C for 5 h, the X-Ray Diffractometer results confirm that a single phase of cobalt ferrite-based nanoparticles is obtained, which is suitable for ICDD 22-1086. The addition of Bi3+, La3+ and Al3+ ions to the cobalt ferrite nanoparticles modified the crystallite size and lattice constant. Trivalent metal cation substitution tunes the crystallite size which has also been confirmed by measuring the grains with Scanning Electron Microscope images. In the Far Transform Infra-Red curve, the addition of metal ions (Bi3+, La3+, and Al3+) to cobalt ferrite nanoparticles resulted in absorption peaks at the tetrahedral and octahedral sites without any additional absorption peaks. The VSM results showed that saturation magnetization decreased drastically in the presence of trivalent non-magnetic cations, which confirms the replacement of Fe3+ by trivalent non-magnetic cations. The kOe order of the coercive field was obtained in this experiment. The largest coercive field of the cobalt ferrite nanoparticles was obtained with the addition of La3+ ions, i.e., 3.67 kOe suggest supporting both Jahn-Teller effect and strain-induced magnetism.

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“…Sol-gel auto-combustion was used to synthesize CoFe 2 O 4 -SiO 2 nanostructures by using metal nitrates as precursors. Bardapurkar et al [97] studied (CoFe 2 O 4 ) x (SiO 2 ) 1−x synthesis, structural, spectral, and magnetic characteristics, where x ranged from 0.1 to 1.0. The crystal structure, cation distribution, and band locations of silica matrix were detected in IR spectra.…”

Section: Sol-gel Auto-combustion Methodsmentioning

confidence: 99%

Nanocomposites of Ferrites with TiO2, SiO2 and Carbon Quantum Dots as Photocatalysts for Degradation of Organic Pollutants and Microbes

Kaur

Sandhu

et al. 2023

Magnetochemistry

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Ferrites are important magnetic materials used in electronic devices. Nanocomposites of ferrites with TiO2, SiO2 and carbon quantum dots have gained recent interest due to their unique advantages, such as high chemical stability, surface-active sites, high specific surface area, non-toxicity, excellent optical properties, and tunable porosity. In the present review, general and adaptable coprecipitation, sol–gel, hydrothermal, solvothermal, and Stöber methods for the fabrication of nanocomposites are discussed. These materials offer the advantage of magnetic recovery and superior photocatalytic performance. The potential of nanocomposites to act as photocatalysts to eliminate organic pollutants and microbes from water is discussed. Mechanisms involved in these applications are also elaborated upon. The review provides a detailed study of recent applications and future perspectives of nanocomposites in sustainable water treatment.

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Structural, magnetic and catalytical properties of cobalt ferrite nanoparticles dispersed in silica matrix

Cited by 16 publications

References 38 publications

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

Structural, microstructural and magnetic properties of sol–gel-synthesized novel BaZrO3–CoFe2O4 nanocomposite

Cation trivalent tune of crystalline structure and magnetic properties in coprecipitated cobalt ferrite nanoparticles

Nanocomposites of Ferrites with TiO2, SiO2 and Carbon Quantum Dots as Photocatalysts for Degradation of Organic Pollutants and Microbes

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