Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu<sup>2+</sup>) substitution

Humbe, Ashok V.; Kounsalye, Jitendra S.; Somvanshi, Sandeep B.; Kumar, Arun; Jadhav, K. M.

doi:10.1039/d0ma00251h

Cited by 126 publications

(27 citation statements)

References 39 publications

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“…12 b. SAED pattern of NT1 exhibited well defined ring patterns that were of typical anatase phase TiO 2, substantiated the purity as well as the crystallinity of the synthesized nano particles 55 . The highly crystalline grain with single spaced lattice rows were free from defects found to be coherent with X-ray diffraction analysis results 56 .

Figure 12 TEM image ( a ) and (b) SAED pattern of NT1.…”

Section: Resultssupporting

confidence: 79%

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Saikumari¹,

Dev

Dev³

2021

Sci Rep

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In order to deal with the arising environmental issues across the globe at present nano particles with unique properties laid a benchmark in the name of nano catalysis. In this work the significance of calcination temperature on the thermal, electronic, structural and surface properties of a nano catalyst produced by sol–gel method using ultrasonic radiation against the disposal of toxic textile pollutants is studied in detail. The extract of tea leaves has been used as a bio-template during the synthesis to revise the crystallite size, surface area, optical absorption potential, and rate of agglomeration of nano sized grains by regulating their physico-chemical and surface properties. The influence of calcination in the transformation of single phased anatase titania to mixed phase anatase–rutile titania and the corresponding outcome in its photocatalytic activity employed in water treatment applications have been verified. The nano catalyst obtained is characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transition electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Thermo gravimetric analysis (TGA), Brunaueur Emmett Teller (BET) analysis, UV–Vis diffused reflectance spectroscopy (DRS-UV–Vis) etc. The mesoporosity of the particle was examined using Barrett Joyner Halenda (BJH) model. The enhanced photo catalytic efficiency (about 97.7%) of templated nano titania due to calcination is verified against Congo red, a textile dye under optimized conditions. The nano catalyst produced can be easily separated, recycled to support its economic feasibility.

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Figure 12 TEM image ( a ) and (b) SAED pattern of NT1.…”

Section: Resultssupporting

confidence: 79%

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Saikumari¹,

Dev

Dev³

2021

Sci Rep

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“…The same magnetization of 72 emu/g with a very low coercivity of 2 Oe was attained by Liu et al 68 at a higher sintering temperature of 1250 °C. The magnetization of spinel ferrites is mainly dependent on purity, crystallinity, and cations distribution between tetrahedral and octahedral sites 46 , 69 . In the collinear two sublattice model, the magnetic moments in the tetrahedral (M A ) and octahedral (M B ) sites mostly determined the final magnetization value of the samples rather than the A–A and B–B exchange interactions.…”

Section: Resultsmentioning

confidence: 99%

Structural, magnetic, and gigahertz-range electromagnetic wave absorption properties of bulk Ni–Zn ferrite

Derakhshani

Taheri-Nassaj

Jazirehpour

et al. 2021

Sci Rep

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Nickel–zinc ferrite (Ni0.5Zn0.5Fe2O4) powders were prepared by the conventional solid-state route and sintered at 1100 and 1300 °C for utilization as a tile electromagnetic wave absorber. Structural, magnetic, and microwave absorption properties were investigated by characterization techniques of X-ray diffraction, thermogravimetric analysis, Raman spectroscopy, electron microscopy, vibrating sample magnetometry, and vector network analyzer. The samples sintered at 1300 °C showed high magnetic saturation of 87 emu/g and low coercivity of 4 Oe. Electromagnetic investigations exhibit high reflection losses up to − 48.1 dB at certain high and low gigahertz frequencies, as clearly depicted in the 3D contour plot. The optimized condition between reflection loss, thickness, and bandwidth revealed a reflection loss of about − 36.1 dB at the matching thickness of 3.7 mm for the X-band. Furthermore, the effective working bandwidth at − 10 dB was up to ~ 7.1 GHz for the minimum thickness of 4.3 mm, which thoroughly covered the C-band. The microwave absorption performance of the well-sintered Ni–Zn ferrite was attributed to the incorporation of dielectric and magnetic loss mechanisms in which the magnetic part prevails.

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“…Nanocrystalline spinel ferrites have been demonstrated as useful material for hyperthermia [ 13 , 14 ], detection of COVID-19 [ 15 ], visible light-enabled photodegradation [ 16 ] and, the catalyst for the synthesis of chalcones [ 17 ]. The molecular formula of spinel-type ferrite is MFe 2 O 4 (M = Co, Ni, Mn, Mg, or other divalent cations) [ 18 ]. Two types of interstitial sites exist such as tetrahedral site coordinates 4 surrounding O ions and the octahedral site coordinates 6 surrounding O ions [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Murugesan

Ugendar²,

Okrasa

et al. 2021

Ceramics International

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This paper reports the structural, morphological, spectroscopic, dielectric, ac conductivity, and impedance properties of nanocrystalline Mn 1-x Zn x Fe 2 O 4 . The nanocrystalline Mn–Zn ferrites were synthesized using a solvent-free combustion reaction method. The structural analysis using X-ray diffraction (XRD) pattern reveals the single-phase of all the samples and the Rietveld refined XRD patterns confirmed the cubic-spinel structure. The calculated crystallite size values increase from 8.5 nm to 19.6 nm with the Zn concentration. The surface morphological analysis using field emission scanning electron microscopy and the transmission electron microscopy confirms the nano size of the prepared ferrites. X-ray photoelectron spectroscopy was used to study the ionic state of the atoms present in the samples. Further, the high-resolution Mn 2p, Zn 2p, Fe 2p, and O 1s spectra of Mn 1-x Zn x Fe 2 O 4 does not result in the appearance of new peaks with Zn content, indicating that the Zn substitution does not change the ionic state of Mn, Zn, Fe, and O present in nanocrystalline Mn 1-x Zn x Fe 2 O 4 . The investigated electrical properties show that the dielectric constant, tan δ and ac conductivity gradually decrease with increasing Zn substitution and the sample Mn 0 · 2 Zn 0 · 8 Fe 2 O 4 has the lowest value of conductivity at 303 K. The ac conductivity measured at different temperatures shows the semiconducting nature of the ferrites. The impedance spectra analysis shows that the contribution of grain boundary is higher compared with the grain to the resistance. The obtained results suggest that the Zn substituted manganese ferrite nanoparticles can act as a promising candidate for high-frequency electronic devices applications.

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Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu²⁺) substitution

Abstract:
Herein, the effect of Cu²⁺ substitution on the structural, morphological, cation distribution, magnetic, and Mössbauer properties of mixed Ni–Zn spinel ferrites was studied.

Cited by 126 publications

References 39 publications

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Structural, magnetic, and gigahertz-range electromagnetic wave absorption properties of bulk Ni–Zn ferrite

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

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Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu2+) substitution

Abstract: Herein, the effect of Cu2+ substitution on the structural, morphological, cation distribution, magnetic, and Mössbauer properties of mixed Ni–Zn spinel ferrites was studied.

Cited by 126 publications

References 39 publications

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

Structural, magnetic, and gigahertz-range electromagnetic wave absorption properties of bulk Ni–Zn ferrite

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Contact Info

Product

Resources

About

Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu²⁺) substitution

Abstract:
Herein, the effect of Cu²⁺ substitution on the structural, morphological, cation distribution, magnetic, and Mössbauer properties of mixed Ni–Zn spinel ferrites was studied.