Structural, optical, and dielectric studies of LaFe1−xMoxO3 (x = 0.0, 0.5) perovskite materials

Triyono, D.; Laysandra, H.; Liu, Hsiang Lin

doi:10.1007/s10854-018-0525-8

Cited by 11 publications

(12 citation statements)

References 30 publications

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“…In other words, Bi substitution changes the lattice constant, causing the change in Jahn-Teller distortion. 28 This is consistent with the observation of an increase in the calculation tolerance factor by X-ray diffraction analysis. Besides, some specic Raman phonon modes are denoted in Fig.…”

Section: Vibrational Analysissupporting

confidence: 90%

“…The electrical analysis for un-substituted sample has been reported in our previous work. 28 These plots are characterised by double semicircular arcs off-centred from the real axis. The high-and low-frequency semicircular arcs represent the grain and grain boundary contributions, respectively.…”

Section: Electrical Impedance Analysismentioning

confidence: 99%

“…Those dielectric constant value signicantly increased compared with the pure-LaFeO 3 compound. 28,36 Fig. 10 shows the frequency dependence of the complex conductivity in the samples prepared at different temperatures.…”

Section: Electrical Impedance Analysismentioning

confidence: 99%

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Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

2020

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Section: Vibrational Analysissupporting

confidence: 90%

Section: Electrical Impedance Analysismentioning

confidence: 99%

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Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

2020

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“…The observed shifts in the Raman modes between the LaFeO 3 and La 1-x Sm x FeO 3 samples, as detailed in table 3, can be attributed to the smaller ionic size of Sm ion. The values of all Raman modes are consistent with the earlier stuties [52][53][54][55][56].…”

Section: Resultssupporting

confidence: 88%

The impact of Sm substitution on structural and optical properties of LaFeO₃: their application as a photocatalyst for the degradation of methylene blue under visible light irradiation

Raslan,

Makram,

Adam

2023

Phys. Scr.

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The objective of the present study is to enhance the photocatalytic activity of LaFeO3 by inserting Sm ions on the La site for the degradation of methylene blue. We employed citric sol-gel techniques to produce ultrafine powders of the La1-xSmxFeO3 (0.0 ≤ x ≤ 0.5) nanoperovskite samples. All samples confirmed the presence of a pure Pbnm orthorhombic phase structure. The decrease of lattice constants, crystallite sizes and cell volumes, and increase in microstrains suggest a deformation of the structure due to the addition of Sm ion on the La site of the La1-xSmxFeO3. The images of HR-TEM and FE-SEM for all samples revealed a homogeneous distribution of almost spherical nanoparticles, with decreasing average particle sizes ranging from 49.95 ± 3.12 to 34.28 ± 4.38 nm, as Sm ratios increases from 0.0 to 0.5%. The spectra of FTIR confirmed the formation of a Lax-1SmxFeO3 perovskite phase by the appearance of lower frequency bands Fe–O-Fe and La-O-La at ~ 400 cm-1 and a higher absorption band Fe -O and La -O at ~ 564 cm-1. The Raman spectra were employed to investigate the formation of phonon modes of La1-xSmxFeO3. Diffused reflectance spectroscopy (DRS) demonstrated the decrease of energy gap (Eg) values from 2.38 to 1.86 eV and the increase in Sm content from 0.0 to 0.5%. Since these Eg values fall within the visible light region, the photocatalytic activity of La1-xSmxFeO3 samples demonstrated a gradual increase in the degradation ratio of MB from 31.7 to 73.2% with increasing Sm content from 0.0 to 0.5%, respectively, under visible light illumination.

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“…The Brillouin zone center normal modes of LaFe1−xZrxO3 with Pbnm symmetry (x = 0.01, 0.05) are represented in Table 2 [12]. The results predict 24 Raman active phonon modes, 28 infrared modes, and 8 silent modes for the room temperature LaFe1−xZrxO3 structure (belonging to the Pbnm symmetry) [12,13]. This prediction was used to analyze the vibrational modes characterized by Raman scattering spectra.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Effect of the Zr-Substitution on the Structural and Electrical Properties of LaFeO3: XRD, Raman Scattering, SEM, and Impedance Spectroscopy Study

2020

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The LaFe1−xZrxO3 (x = 0.01, 0.05) ceramics were prepared by sol-gel and annealing method and studied by XRD, Raman scattering analysis, SEM, and impedance spectroscopy method. The crystal structure and phonon characteristics analysis revealed that the crystal structure tends to preserve its ideal orthorhombic structure, following the increase in driving force of the Fe/ZrO6 octahedral tilting. The frequency-dependent dielectric parameters at each temperature decreased with increasing Zr content. The temperature dependence dielectric relaxation and dc conduction mechanism satisfied the Arrhenius law and increased with increasing Zr content. The activation energy ranged from 0.30 to 0.50 eV and was similar in the relaxation and conduction mechanisms, indicating that both transport mechanisms were based on a similar mechanism.

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Structural, optical, and dielectric studies of LaFe1−xMoxO3 (x = 0.0, 0.5) perovskite materials

Cited by 11 publications

References 30 publications

Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

The impact of Sm substitution on structural and optical properties of LaFeO₃: their application as a photocatalyst for the degradation of methylene blue under visible light irradiation

Effect of the Zr-Substitution on the Structural and Electrical Properties of LaFeO3: XRD, Raman Scattering, SEM, and Impedance Spectroscopy Study

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Structural, optical, and dielectric studies of LaFe1−xMoxO3 (x = 0.0, 0.5) perovskite materials

Cited by 11 publications

References 30 publications

Dielectric analysis and electrical conduction mechanism of La1−xBixFeO3ceramics

Dielectric analysis and electrical conduction mechanism of La1−xBixFeO3ceramics

The impact of Sm substitution on structural and optical properties of LaFeO3: their application as a photocatalyst for the degradation of methylene blue under visible light irradiation

Effect of the Zr-Substitution on the Structural and Electrical Properties of LaFeO3: XRD, Raman Scattering, SEM, and Impedance Spectroscopy Study

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Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

Dielectric analysis and electrical conduction mechanism of La_1−xBi_xFeO₃ceramics

The impact of Sm substitution on structural and optical properties of LaFeO₃: their application as a photocatalyst for the degradation of methylene blue under visible light irradiation