Magnetically Recyclable Spinel Mn x Ni1−x Fe2 O 4 (x= 0.0–0.5) Nano-photocatalysts: Structural, Morphological and Opto-magnetic Properties

Barathiraja, C.; Manikandan, A.; Mohideen, A. M. Uduman; Jayasree, S.; Antony, S. Arul

doi:10.1007/s10948-015-3312-2

Cited by 104 publications

(28 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results have been obtained and reported by Zhicheng et al . The lattice parameters “ a ” and “ c ” have been calculated using the equation 1/ d 2 = 4/3 a 2 [ h 2 + hk + k 2 ] + l 2 / c 2 where, ( hkl ) are the Miller indices corresponding to interplanar spacing. The lattice parameter “ a ” varies as 3.236, 3.244, 3.247, and 3.216 Å whereas the parameter “ c ” varies as 5.184, 5.175, 5.201, and 5.216 Å for the pristine and x = 0.01, 0.02, and 0.03, respectively.…”

Section: Resultssupporting

confidence: 77%

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Arora

Kumar²,

Kaur

et al. 2018

J Am Ceram Soc

View full text Add to dashboard Cite

Compounds of undoped and samarium (Sm) doped ZnO have been prepared by standard solid‐state reaction method. X‐ray diffraction (XRD), Williamson‐Hall (W‐H) analysis, Transmission Electron Microscopy (TEM), temperature‐dependent electrical and dielectric studies have been done to characterize these materials. Inclusion of Sm as dopant in hexagonal wurtzite ZnO changes the lattice parameters to a small extent with some Sm aggregation at higher concentration. Also, the mean particle sizes of ZnO:Sm compounds showed an inter‐correlation with the Scherrer method, W‐H analysis as well as with TEM results. The electrical resistivity depicts an exponential decay and metal‐semiconductor transition (MST) at ~300 K for the pristine sample whereas there is large decrement in the resistivity with Sm doping. The analysis of σac of ZnO suggests that the power law is obeyed and indicated an increase in the ac conductivity with Sm content. The mechanism behind this type of conductivity is elucidated by small polaron tunneling (SPT) model of conductivity. The dependence of ln dc on the temperature inverse shows that the traps of electrons are thermally activated such that low and high temperature activation energies confirm the presence of vacancies and interstitials of both O and Zn ions. Thus, a high value of dielectric constant makes these materials suitable for high frequency and charge storage device applications.

show abstract

Section: Resultssupporting

confidence: 77%

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Arora

Kumar²,

Kaur

et al. 2018

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…In the present investigation, similar results were observed. Stoner-Wolfforth model clearly demonstrated that role of single domains and multidomains on their coercivity value as the particle size decreases, their Hc values also decreases [45][46][47][48]. From Table 4, the coercivity is higher for pristine LaFeO 3 compound.…”

Section: Magnetic Property Analysismentioning

confidence: 83%

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

Raji

Kurapati

Ramachandran

et al. 2020

Preprint

View full text Add to dashboard Cite

In the current study, we report a comprehensive evaluation of the microstructures, optical, dielectric and magnetic traits of Ti-substituted perovskite structured lanthanum ferrite with chemical compositions LaTixFe1−xO3 (x = 0, 0.05, 0.15, 0.25). X-ray diffraction with Rietveld refinement and Raman analysis confirmed that both pure and Ti-substituted LaFeO3 maintained single-phase orthorhombic phase with Pbnm symmetry. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the LaFeO3. The spherical shaped morphology of all products was confirmed by SEM. The quantitative chemical composition and their distribution were confirmed by EDAX and mapping. The UV-Vis spectroscopic studies showed an excitonic absorption edge at 590 nm is ascribed to the electronic transition from O2p→Fe3d. Optical band gap (Eg) values were assessed by applying Tauc schemes, showed that Eg values are in a narrow range (1.85–2.02 eV). The dielectric properties such as, dielectric constant (ε’), dielectric loss (tan δ) was examined by varying with temperature and frequency. The magnetic results revealed weak ferromagnetic nature trait at 300 K. The variation in Ms (saturation magnetization), Hc (coercivity) and Mr (remanence) values were observed with increasing Ti substitution level.

show abstract

“…It was observed that the lattice parameter increased from 8.357 Å (Cu 1 − x Zr x Fe 2 O 4 ( x = 0)) to 8.556 Å (Cu 1 − x Zr x Fe 2 O 4 ( x = 1)) with an increase in Zr dopant. This is mainly due to the replacement of smaller ionic radius Cu 2+ (0.73 Å) ions in the CuFe 2 O 4 spinel by larger ionic radius Zr 4+ (0.87 Å) ions …”

Section: Resultsmentioning

confidence: 99%

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Singh

Rajput

Govil

et al. 2018

Applied Organom Chemis

View full text Add to dashboard Cite

The effect of varied zirconium content on the structural, morphological, magnetic, optical, thermal and catalytic properties of nanoparticles of the ferrite Cu1 − xZrxFe2O4 (x = 0, 0.5, 1) was investigated. The mixed ferrite was synthesized by the auto‐combustion method using nitrates of respective metals and citric acid as a chelating agent. The as‐prepared nanoparticles showed dual benefits. They were employed as a heterogeneous catalyst for one‐pot synthesis of polysubstituted pyridine derivatives as well as for catalytic degradation of industrial waste dyes such as methylene blue (MB). The highlight of the research reported is the catalytic degradation of industrial waste (MB) with high efficiency in eluent of a wide range of pH (3–13). The proposed nanoparticles arguably offer certain great advantages that include: low cost, facile nature, anti‐leaching property, magnetic recoverability and recyclability. The characterization of the as‐synthesized nanoparticles was done using various techniques. The leaching study was carried out using inductively coupled plasma optical emission spectroscopy. The formation of organic products was confirmed using Fourier transform infrared and 1H NMR spectroscopies and examination of degradation products of MB dye was carried out using mass spectrometry and UV–visible spectroscopy.

show abstract

Magnetically Recyclable Spinel Mn x Ni1−x Fe2 O 4 (x= 0.0–0.5) Nano-photocatalysts: Structural, Morphological and Opto-magnetic Properties

Cited by 104 publications

References 56 publications

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Contact Info

Product

Resources

About

Magnetically Recyclable Spinel Mn x Ni1−x Fe2 O 4 (x= 0.0–0.5) Nano-photocatalysts: Structural, Morphological and Opto-magnetic Properties

Cited by 104 publications

References 56 publications

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

Dual functional novel catalytic Cu1−xZrxFe2O4 (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Contact Info

Product

Resources

About

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue