Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO3, LaFe0.9Mn0.1O3, and LaMnO3 perovskites

Lakshmi, R.V.; Bera, Parthasarathi; Hiremath, Maheshwarayya; Dubey, Varun; Kundu, Asish K.; Barshilia, Harish C.

doi:10.1039/d1cp05501a

Cited by 19 publications

(3 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FTIR spectra captured by the Bruker spectrometer were used to validate the creation of the metal-oxide phase, and the occurrence of Mn-O stretching vibrations. The observed band at 560 cm -1 is due to the stretching vibration of Mn-O bonds, which agrees with a study conducted in 2020 [29].Also, it is observed that there are several distinct peaks at 654 and 429cm -1 which attributed to Mn-O vibrations [30].Moreover, the absence of any peak in the region (4000-3000) cm -1 indicates that the nanoparticles are free of any trace of water molecules, which may be due to solvent residues or air moisture [31]. This arrangement in the crystal size is in agreement with the arrangement that was calculated from the Debye-Scherrer equation.…”

Section: Methodssupporting

confidence: 91%

Synthesis of Mn2O3 Nanoparticles and Determination of Its Inhibition Effect On Sera of Iraqi Patients with Diabetes Mellitus Type-2 and Diabetes Nephropathy

Tawfeeq Ali,

H. Hussein,

Abdul Rudha Abbas

2024

ANJS

View full text Add to dashboard Cite

Manganese is essential for the synthesis of antioxidant enzymes and metabolic issues in Diabetes type 2 (DMT2), which is a worldwide disease, Chronic metabolic disorders cause insulin resistance, hyperglycemia, and complications like diabetic nephropathy. Arginase converts arginine to ornithine and urea. Increased arginase activity in DMT2 and diabetes nephropathy (DN)which has been linked to kidney damage, and arginase inhibitors can increase NO which is essential to vascular function. However, the molecular mechanisms of arginased is regulationare in DMT2 and DN are still unclear. This study examined the effect of manganese oxide nanoparticles (Mn2O3NPs) on arginase activity inhibition inserum samples from DMT2 and DN patients. We hypothesized that Mn2O3NPs alter cell redox status and signaling pathways, affecting DMT2 and DN arginase activity. We used a colorimetric assay to measure arginase activity in 80 serum samples from DMT2 and DN patients treated with different MnO2 NP concentrations to test our hypothesis. The current study characterized nanoparticles using various techniques such as IR, SEM, AFM, XRD, and EDX, which found it within nanoscale nature. Our findings are that Mn2O3NPs modulate arginase activity specificity in DM2 samples. SuggestionsMn2O3NPs could be used to develop new treatments for these conditions.

show abstract

Section: Methodssupporting

confidence: 91%

Synthesis of Mn2O3 Nanoparticles and Determination of Its Inhibition Effect On Sera of Iraqi Patients with Diabetes Mellitus Type-2 and Diabetes Nephropathy

Tawfeeq Ali,

H. Hussein,

Abdul Rudha Abbas

2024

ANJS

View full text Add to dashboard Cite

show abstract

“…Figure 3 shows the FTIR spectrum obtained from the powders, where two absorption bands positioned at 437 cm −1 and 603 cm −1 are clearly observed. The weak absorption band located at 437 cm −1 is attributed to the bending vibrations of the Fe-O bonds within the FeO 6 octahedron [32], while the intense absorption band positioned at 603 cm −1 is a result of the stretching vibration of the Cr-O bonds within the CrO 6 octahedra [33]. Thus, the octahedral coordination of Fe and Cr ions with oxygen ions (O 2− ) in the powders is confirmed by the FTIR spectrum.…”

Section: Microstructural Characterizationmentioning

confidence: 67%

Microstructural Characterization and Magnetic, Dielectric, and Transport Properties of Hydrothermal La2FeCrO6 Double Perovskites

Yi,

Wu,

Tang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Double perovskite La2FeCrO6 (LFCO) powders were synthesized via the hydrothermal method, which crystallized in an orthorhombic (Pnma) structure and exhibited a spherical morphology with an average particle size of 900 nm. Fourier transform infrared spectroscopy demonstrated the presence of fingerprints of vibrational modes of [FeO6] and [CrO6] octahedra in the powders. The XPS spectra revealed dual oxide states of Fe (Fe2+/Fe3+) and Cr (Cr3+/Cr4+) elements, and the oxygen element appeared as lattice oxygen and defect oxygen, respectively. The LFCO powders exhibited weak ferromagnetic behavior at 5 K with a Curie temperature of 200 K. Their saturation magnetization and coercive field were measured as 0.31 μB/f.u. and 8.0 kOe, respectively. The Griffiths phase was observed between 200 K and 223 K. A butterfly-like magnetoresistance (MR)–magnetic field (H) curve was observed in the LFCO ceramics at 5 K with an MR (5 K, 6 T) value of −4.07%. The temperature dependence of resistivity of the LFCO ceramics demonstrated their semiconducting nature. Electrical transport data were fitted by different conduction models. The dielectric behaviors of the LFCO ceramics exhibited a strong frequency dispersion, and a dielectric abnormality was observed around 260 K. That was ascribed to the jumping of electrons trapped at shallow levels created by oxygen vacancies. The dielectric loss showed relaxation behavior between 160 K and 260 K, which was attributed to the singly ionized oxygen vacancies.

show abstract

“…The XRD pattern matches the rhombohedral crystalline form of the LaMnO3 perovskite with the R-3c group corresponding to JCPDS No. 50-0298 satisfactorily [57]. The diffraction peaks of CLMO were prominently detected at 2θ angles of 22.9°, 32.5°, 40.1°, 46.5°, 52.5°, 58.1°, 68.2°, 69.3°, and 77.9°, which are archived for (012), ( 110), ( 202), ( 024), ( 122), ( 214), ( 220), (208), and (128) facets of the lattice, respectively.…”

Section: Characterization Techniquesmentioning

confidence: 94%

Synthesis of Ce0.1La0.9MnO3 Perovskite for Degradation of Endocrine-Disrupting Chemicals under Visible Photons

et al. 2022

View full text Add to dashboard Cite

The UN Environmental Protection Agency has recognized 4-n-Nonylphenol (NP) and bisphenol A (BPA) as among the most hazardous chemicals, and it is essential to minimize their concentrations in the wastewater stream. These industrial chemicals have been witnessed to cause endocrine disruption. This report describes the straightforward hydrothermal approach adopted to produce Ce0.1La0.9MnO3 (CLMO) perovskite’s structure. Several physiochemical characterization approaches were performed to understand the Ce0.1La0.9MnO3 (CLMO) perovskite crystalline phase, element composition, optical properties, microscopic topography, and molecular oxidation state. Here, applying visible photon irradiation, the photocatalytic capability of these CLMO nanostructures was evaluated for the elimination of NP and BPA contaminants. To optimize the reaction kinetics, the photodegradation of NP and BPA pollutants on CLMO, perovskite was studied as a specification of pH, catalyst dosage, and initial pollutant concentration. Correspondingly, 92% and 94% of NP and BPA pollutants are degraded over CLMO surfaces within 120 and 240 min, respectively. Since NP and BPA pollutants have apparent rate constants of 0.0226 min−1 and 0.0278 min−1, respectively, they can be satisfactorily fitted by pseudo-first-order kinetics. The decomposition of NP and BPA contaminants is further evidenced by performing FT-IR analysis. Owing to its outstanding photocatalytic execution and simplistic separation, these outcomes suggest that CLMO is an intriguing catalyst for the efficacious removal of NP and BPA toxicants from the aqueous phase. This is pertinent for the treatment of endocrine-disrupting substances in bioremediation.

show abstract

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

Abstract: Nanocrystalline LaFeO3, LaFe0.9Mn0.1O3, and LaMnO3 perovskites have been synthesized by a novel solution combustion route, wherein oxalyl dihydrazide has been used as a fuel. These materials have been characterized by...

Cited by 19 publications

References 68 publications

Synthesis of Mn2O3 Nanoparticles and Determination of Its Inhibition Effect On Sera of Iraqi Patients with Diabetes Mellitus Type-2 and Diabetes Nephropathy

Synthesis of Mn2O3 Nanoparticles and Determination of Its Inhibition Effect On Sera of Iraqi Patients with Diabetes Mellitus Type-2 and Diabetes Nephropathy

Microstructural Characterization and Magnetic, Dielectric, and Transport Properties of Hydrothermal La2FeCrO6 Double Perovskites

Synthesis of Ce0.1La0.9MnO3 Perovskite for Degradation of Endocrine-Disrupting Chemicals under Visible Photons

Contact Info

Product

Resources

About