Effect of amorphous silica matrix on structural, magnetic, and dielectric properties of cobalt ferrite/silica nanocomposites

Nadeem, K.; Zeb, F.; Abid, M.; Mumtaz, M.; Rehman, Mubashir

doi:10.1016/j.jnoncrysol.2014.05.004

Cited by 51 publications

(25 citation statements)

References 34 publications

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“…These systems are useful for investigation of the relationship between the size of the particles, inter-particle interactions and macroscopic magnetic properties [36][37][38][39][40][41][42]. However, thus far no detailed studies have been carried out to investigate the effect of annealing at high temperatures on the magnetic properties of NiO nanoparticles in a silica matrix.…”

Section: Introductionmentioning

confidence: 99%

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Nikolić¹,

Panjan²,

Blake³

et al. 2015

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Nikolić¹,

Panjan²,

Blake³

et al. 2015

Journal of the European Ceramic Society

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“…The peaks at 2924 cm −1 are due to stretching vibrations of C=H bond of the CH 3 functional group [6]. The bands in the range 457-470 and 540-549 cm −1 correspond to the vibration of [10] and all the frequencies data are showed in Table 2. …”

Section: Functional Group Analysismentioning

confidence: 95%

Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Sagayaraj¹,

Aravazhi²,

Praveen³

et al. 2017

J Mater Sci: Mater Electron

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The most stable and magnetic recoverable material XY 2 Z 4 (X = Zn, Y = Fe and Z = O) having spinel ferrite nanoparticles were synthesized by chemical co-precipitation technique using polyvinyl pyrrolidone (PVP) as the surfactant. The synthesized nanoparticles were characterized by using various characterization techniques. The X-ray diffraction (XRD) analyses revealed that, the ZnFe 2 O 4 have normal spinel structure of phase pure polycrystalline in nature. The FT-IR analysis revealed that the two prestigious vibration bands recorded near (540-550 cm −1 ) and (455-470 cm −1 ) show the presence of tetrahedral and octahedral voids in zinc ferrite. The transmission electron microscopy (TEM) photographs showed the synthesized ZnFe 2 O 4 nanoparticles are spherical in shape and has magnetic domain structure. The vibrating sample magnetometer (VSM) spectra indicated that the prepared ZnFe 2 O 4 nanoparticles exhibited super paramagnetic behavior along with high saturation magnetization at room temperature. Such synthesis ZnFe 2 O 4 nanoparticles with sympathetic size and tunable magnetic properties are used for various promising biomedical applications.

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“…The non‐uniform distribution of ZnFe 2 O 4 nanoparticles may be due to the nano size effect and surface magnetic nature of ZnFe 2 O 4 nanoparticles which led to more agglomeration of nanoparticles [30] . Noticeably, this agglomeration of ZnFe 2 O 4 nanoparticles was greatly minimized after incorporation of CeO 2 nanostructures (Figure 3d and e) [31] . The dense decorations of nanoparticles on the BRGO surface indicate the affinity of the nanoparticles on the BRGO sheets which can act as a spacer.…”

Section: Resultsmentioning

confidence: 99%

“…[30] Noticeably, this agglomeration of ZnFe 2 O 4 nanoparticles was greatly minimized after incorporation of CeO 2 nanostructures (Figure 3d and e). [31] The dense decorations of nanoparticles on the BRGO surface indicate the affinity of the nanoparticles on the BRGO sheets which can act as a spacer.…”

Section: Structural and Morphological Analysismentioning

confidence: 99%

Design of a Non‐Cytotoxic ZnFe₂O₄‐CeO₂/BRGO Direct Z‐Scheme Photocatalyst with Bioreduced Graphene Oxide as Cocatalyst

et al. 2021

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Herein,we report the synthesis of a non‐cytotoxic ternary ZnFe2O4‐CeO2/bioreduced graphene oxide (BRZC) nanocomposite via in situ reflux method using a green solvent. The bioreduced graphene oxide (BRGO) used in the nanocomposite was obtained by reducing graphene oxide (GO) in Ocimum tenuiflorum leaf extract. Thourough structural, morphological, and photochemical characterizations revealed that the BRZC heterojunction possesses highly crystalline nanoparticles, enhanced surface reactive sites and suitable band arrangement for photon adsorption. Such a structure was found to bebeneficial in accelerating photocatalytic reaction synergistically by inhibiting charge carrier recombination. The BRZC nanocomposite showcased superior efficiency towards Chlorpyrifos (0.0634 min−1) andRhodamine B (0.0907 min−1) photodegradation. Detailed investigations revealed a most suitable internal electric field‐driven direct Z‐scheme mechanism between ZnFe2O4 and CeO2,where BRGO acts as a cocatalyst. After multiple photochemical and radical trapping experiments, .OH and O2.− were found to be the active species behind the enahnced activity. The ternary heterojunction was also found to be effective for highly toxic real textile effluents with 82 % degradation efficiency. Moreover, Trypan Blue Exclusion (TBE) assay study demonstrated the non‐cytotoxicity nature of the photocatalyst and a significant decrease in cytotoxicity of the above photocatalytically treated pollutants.

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Effect of amorphous silica matrix on structural, magnetic, and dielectric properties of cobalt ferrite/silica nanocomposites

Cited by 51 publications

References 34 publications

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Design of a Non‐Cytotoxic ZnFe₂O₄‐CeO₂/BRGO Direct Z‐Scheme Photocatalyst with Bioreduced Graphene Oxide as Cocatalyst

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Effect of amorphous silica matrix on structural, magnetic, and dielectric properties of cobalt ferrite/silica nanocomposites

Cited by 51 publications

References 34 publications

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Design of a Non‐Cytotoxic ZnFe2O4‐CeO2/BRGO Direct Z‐Scheme Photocatalyst with Bioreduced Graphene Oxide as Cocatalyst

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Design of a Non‐Cytotoxic ZnFe₂O₄‐CeO₂/BRGO Direct Z‐Scheme Photocatalyst with Bioreduced Graphene Oxide as Cocatalyst