Structural, magnetic, and electrical property of nanocrystalline perovskite structure of iron manganite (FeMnO3)

Gowreesan, S.; Kumar, A. Ruban

doi:10.1007/s00339-017-1302-x

Cited by 35 publications

(20 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the domination of conducting grains, the resistivity comes down, so the loss arises and saturated at high frequency, and it obeys Koop's law. e tan loss is given by the relation e AC conductivity is maximum at higher temperatures with high frequency, and the same trend has been followed Journal of Chemistry by all the samples of MgO nanoparticles due to charge carrier and hopping electrons also increases [92]. Moreover, it obeys the Maxwell-Wagner two-layer model according to this conductivity increases gradually along with frequency [93].…”

Section: Tan Losssupporting

confidence: 57%

“…Moreover, it obeys the Maxwell-Wagner two-layer model according to this conductivity increases gradually along with frequency [93]. Due to polarization effects at electrode and electrolyte interface at low frequency, the variation of conductivity has occurred and all the values have merged at lower frequency owing to grains and grain boundaries which are more active, at low temperature fewer charge carriers are available, and less hoping electrons might be the reason for low conduction at low frequency [92,93]. AC conductivity was calculated using the relation given as follows:…”

Section: Tan Lossmentioning

confidence: 86%

See 1 more Smart Citation

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Venkatachalam

Jesuraj

Kalainathan

2021

Journal of Chemistry

View full text Add to dashboard Cite

The magnesium oxide nanoparticles (MgO NPs) were prepared from Moringa oleifera leaf extract. Phytochemicals are derived from plant extract which are served as stabilizing and capping agents. This green route has been attracted owing to speed, reliable, and eco-friendly and cost-effective one. The synthesized magnesium oxide nanoparticles were taken into three different calcination temperatures (500, 600, and 700°C). The powder X-ray diffraction (PXRD) study shows a pure phase of face-centered cubic structure. Periclase MgO nanoparticles were prepared. The optical band gap of MgO nanoparticles is 4.5 eV, and its absorption in the UV region was observed by UV-visible spectroscopy (UV-Vis). Photoluminescence spectra have exhibited multicolor emissions were being at UV and visible region due to defect centers (F centers) of MgO nanoparticles. EDX (energy dispersive X-ray spectrum) has given the stoichiometric ratio of Mg and O. The functional groups have been studied by Fourier transformed infrared spectroscopy (FTIR), surface morphology transformation has been identified by scanning electron microscopy (SEM) studies, and VSM measurements have given the information of diamagnetic nature of MgO nanoparticles. H-R TEM micrographs have confirmed that particles were in nanorange matched with XRD report. Polycrystalline nature has been observed pattern information. TG-DSC characterization revealed phase transition and weight loss information. D-band and G-band of MgO nanoparticles are studied by micro-Raman analysis. Dielectric analysis has proven that MgO nanoparticles will be a promising candidate for linear dielectric ceramics, thermistor. The present resent studies have revealed that MgO powder will be an economical and promising candidate in superconductor, optoelectronic device, and energy storage applications.

show abstract

Section: Tan Losssupporting

confidence: 57%

Section: Tan Lossmentioning

confidence: 86%

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Venkatachalam

Jesuraj

Kalainathan

2021

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…To explain that, the particle comprises several grains inside the magneto crystalline anisotropy is average over many grains and various orientation. Large anisotropy results in an increase in coercivity with an increase in particle size [38]. Table 3 demonstrates a comparative study between our prepared samples and those recorded in the literature in view of their magnetic properties.…”

Section: Magnetic Propertiesmentioning

confidence: 89%

Role of B-site cation on the structure, magnetic and dielectric properties of nanosized La_0.7Sr_0.3Fe_1−xM_xO₃ (M = Mn; Co and x = 0, 0.5) perovskites

Ghozza

Yahia

El-Dek

2020

Mater. Res. Express

View full text Add to dashboard Cite

The easiness of preparation and tailored properties of perovskite nanoparticles rendered them an important class of materials in the last decade. In this work, La 0.7 Sr 0.3 Fe 1-x M x O 3 (M=Mn, Co and x=0, 0.5) orthoferrites were synthesized using combustion method and examined using X-ray diffraction. The orthorhombic structure was clearly obvious with Pbnm space group without the need of any thermal treatment. Field emission scanning electron microscopy (FESEM) accompanied by Energy-dispersive spectroscopy studies were also performed, evidencing the similarity of both nominal and chemical compositions for the studied orthoferrites. The thermal dependence of the dielectric properties was investigated (from room temperature to 698 K) in the frequency range (70 Hz-5 MHz). Magnetic properties were investigated at room temperature and discussed.

show abstract

“…The presence of mixed ferrian bixbyite (FeMnO 3 ), or iron manganite, has been previously identified in FeMnO X catalysts. 43,44 Previous studies, particularly those by Xia et al 19 and Chen et al, 7 potential for Fe-Mn interaction; that is, the direct chemical interaction of these species allows for easier electron transfer, aiding in the re-oxidation of the active metal oxide phase. 12 However, this accounts for less than 10% w/w in a mixed system (Table 1), indicating its role towards enhancing the NO conversion of the catalyst may be less significant.…”

Section: Catalyst Phase Composition and Morphologymentioning

confidence: 99%

Synthesis and characterisation of monolithic PTFE‐modified MnO_X/FeO_X catalysts for selective catalytic reduction (SCR) of NO_X at low temperature

Dongen

Moura

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Selective catalytic reduction (SCR) of NOX has been the most widely used technique for the reduction of NOX emissions from combustion flue gas. MnOX/FeOX based catalysts typically can attain high NOX conversion at low temperature but with inferior water vapor resistance. RESULTS A MnOX/FeOX catalyst was synthesized by the sonicated co‐precipitation method and then wash‐coated on ceramic cordierite monoliths to form a low pressure drop monolithic catalyst suitable for high flowrate flue gas treatment conditions. The catalyst achieved above 90% NO conversion at a gas hourly space velocity (GHSV) of 30 000 h−1 over a 125–225 °C temperature window under simulated industrial flue gas conditions. In the presence of up to 5% H2O vapor, comparable performance was retained for a reduced temperature window of ≥150 °C. In order to improve water resistance and LT‐SCR performance, an optimal 10% w/w polytetrafluoroethylene (PTFE) doped MnOX/FeOX catalyst was developed, which exhibited remarkably high performance of up to 98% NO conversion, with improved water resistance at up to 10% v/v H2O while retaining high performance from 100 °C. CONCLUSION Monolithic MnOX/FeOX catalyst incorporating PTFE significantly improved NO conversion and water vapour resistance due to the enhanced NH3 adsorption associated with Lewis acid sites and water repellent property. These findings will provide guidance for researchers in this field to adapt F‐based or similar additives into the making of high performance and high water resistance catalysts either to retrofit existing catalyst synthesis procedures or reinvent a novel catalyst in a scalable but economical way. © 2020 Society of Chemical Industry

show abstract

Structural, magnetic, and electrical property of nanocrystalline perovskite structure of iron manganite (FeMnO3)

Cited by 35 publications

References 27 publications

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Role of B-site cation on the structure, magnetic and dielectric properties of nanosized La_0.7Sr_0.3Fe_1−xM_xO₃ (M = Mn; Co and x = 0, 0.5) perovskites

Synthesis and characterisation of monolithic PTFE‐modified MnO_X/FeO_X catalysts for selective catalytic reduction (SCR) of NO_X at low temperature

Contact Info

Product

Resources

About

Structural, magnetic, and electrical property of nanocrystalline perovskite structure of iron manganite (FeMnO3)

Cited by 35 publications

References 27 publications

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

Role of B-site cation on the structure, magnetic and dielectric properties of nanosized La0.7Sr0.3Fe1−xMxO3 (M = Mn; Co and x = 0, 0.5) perovskites

Synthesis and characterisation of monolithic PTFE‐modified MnOX/FeOX catalysts for selective catalytic reduction (SCR) of NOX at low temperature

Contact Info

Product

Resources

About

Role of B-site cation on the structure, magnetic and dielectric properties of nanosized La_0.7Sr_0.3Fe_1−xM_xO₃ (M = Mn; Co and x = 0, 0.5) perovskites

Synthesis and characterisation of monolithic PTFE‐modified MnO_X/FeO_X catalysts for selective catalytic reduction (SCR) of NO_X at low temperature