Cost effective preparation and characterization of nanocrystalline nickel ferrites (NiFe2O4) in low temperature regime

Shanmugavel, T.; Raj, S. Gokul; Kumar, G. Ramesh; Rajarajan, G.; Saravanan, D.

doi:10.1016/j.jksus.2014.12.006

Cited by 69 publications

(24 citation statements)

References 28 publications

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“…In the case of inverse spinel nickel ferrite, some of the trivalent Fe 3+ ions occupy tetrahedral voids. This typical stretch of Fe 3+ and O 2− observed at 1027.4 cm −1 is governed to the migrated Fe 3+ ions in tetrahedral voids [44]. In Fig.…”

Section: Ft-ir Studymentioning

confidence: 75%

Nanocrystalline-modified nickel ferrite films: an effective sensor for industrial and environmental gas pollutant detection

Koli¹,

Kapadnis²,

Deshpande³

2019

J Nanostruct Chem

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The inverse spinel nanocrystalline pure and doped nickel ferrite particles were synthesized by co-precipitation method. The thick films of both pure and doped nickel ferrite nanoparticles were prepared by coating the material on glass substrate via screen printing method. The XRD was used to confirm cubic, crystalline nickel ferrites. The scanning electron microscopy confirms nanosized, cubic nanoparticles of nickel ferrite, and their morphology was investigated. The energy-dispersive spectroscopy was used to comprise elemental composition for pure and doped ferrites. Transmission electron microscopy was attributed for investigation of surface morphology, crystal structure identification of nickel ferrites. The FT-IR was used to find the vibrational frequencies, symmetric, asymmetric stretching and bending modes of metal oxide linkage. The thick films of nickel ferrite were employed for sensing phenomenon of gases such as LPG, NO 2 , CH 3-OH, C 2 H 5-OH, NH 3 and petrol vapours. The pure nickel ferrite showed excellent results for ammonia and nitrogen dioxide gases up to 90.42 and 86.42, respectively. Manganese-and cobalt-doped ferrites were excellent for ammonia and petrol vapours. Modified nickel ferrite effect of dopants cobalt and manganese was investigated. Pure and doped ferrites showed excellent response and recovery for ammonia, NO 2 , petrol vapours and LPG gases.

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Section: Ft-ir Studymentioning

confidence: 75%

Nanocrystalline-modified nickel ferrite films: an effective sensor for industrial and environmental gas pollutant detection

Koli¹,

Kapadnis²,

Deshpande³

2019

J Nanostruct Chem

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“…The crystallite size of Dy 3+ substituted Ni-Co ferrite nanoparticles was calculated by using the famous equation proposed by Deby-Scherer [25]. According to this equation, the average crystallite size of the synthesized product was 7.8 nm.…”

Section: Xrd Analysismentioning

confidence: 99%

Dysprosium substituted nickel cobalt ferrite nanomaterials and their composites with reduced graphene oxide for photocatalysis

Shahid

Alsafari

Jamil

et al. 2020

Journal of Taibah University for Science

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High-quality nanostructure of dysprosium substituted nickel-cobalt ferrite and their composite with reduced graphene oxide (rGO) were synthesized. The structuraland photocatalytic properties of prepared samples were studied. The XRD and FTIR analysis confirmed the FCC spinel structure. The calculated average crystallite size of nanoparticles was around 7.8 nm. The bandgap energy of synthesized composition was found to be 2.27 eV. The uniform dispersion of nanoparticles on the graphene nanosheets were confirmed by the FESEM analysis. The photocatalytic efficiency of nanoparticles and their composites with rGO was studied for degradation of methylene blue (MB) under visible light irradiation. It was found that nanocomposite exhibited high photocatalytic activity (72.7%) as compared to Dy +3 substituted Ni-Co ferrite nanoparticles (52.4%). This enhanced photocatalytic activity can be attributed to the presence of graphene, which enhances the stability of nanocomposite and reduces the recombination of charge carriers.

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“…It can be seen from Fig.5 and Table.1 that the M s increases with the increasing grain size when the grain size was below micron order of magnitude, which can be attributed to the presence of large amount of surface spin canting in ferrite nanoparticles sintered at low temperatures [30]. The NFO samples in our work show much higher M s values, compared with previous works of NFO prepared by various methods [7,10,[31][32][33][34], which may be connected with the different microstructures as a result of various preparation and sintering conditions.…”

Section: Resultsmentioning

confidence: 41%

Structural, dielectric and magnetic properties of NiFe2O4 prepared via sol–gel auto-combustion method

Sun

Zhang

Wang

et al. 2017

Journal of Magnetism and Magnetic Materials

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Nickel ferrite (NiFe 2 O 4) powders were synthesized via sol-gel auto-combustion method and the corresponding temperature dependence of microstructure, dielectric and magnetic properties have been investigated. Results of XRD and SEM indicate that the NiFe 2 O 4 samples exhibit a typical single phase spinel structure and a uniform particle distribution. The dielectric constant and dielectric loss measurements show strong frequency dependence of all the samples. The peak observed in frequency dependence of dielectric loss measurements shifts to higher frequency with the increasing sintering temperature, indicating a Debye-like dielectric relaxation. The remanent magnetization increases with the increasing grain size while the coercivity is just the opposite. The saturation magnetization can achieve 50 emu/g when the sintering temperature is more than 1000 o C, and the lowest coercivity (159.49 Oe) was observed in the NFO sample sintered at 1300 o C for 2 h.

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Cost effective preparation and characterization of nanocrystalline nickel ferrites (NiFe2O4) in low temperature regime

Cited by 69 publications

References 28 publications

Nanocrystalline-modified nickel ferrite films: an effective sensor for industrial and environmental gas pollutant detection

Nanocrystalline-modified nickel ferrite films: an effective sensor for industrial and environmental gas pollutant detection

Dysprosium substituted nickel cobalt ferrite nanomaterials and their composites with reduced graphene oxide for photocatalysis

Structural, dielectric and magnetic properties of NiFe2O4 prepared via sol–gel auto-combustion method

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