Effect of Fe and Bi doping on LaCoO3 structural, magnetic, electric and catalytic properties

Ajmal, Sara; Bibi, Ismat; Majid, Farzana; Ata, Sadia; Kamran, Kashif; Jilani, Kashif; Nouren, Shazia; Kamal, Shagufta; Ali, Abid; Iqbal, Munawar

doi:10.1016/j.jmrt.2019.08.029

Cited by 72 publications

(19 citation statements)

References 76 publications

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“…Crystallite size was in 21‐31 nm range. Cell volume is given by formula in Equation ) 32 . X‐ray density of La 1− y Gd y Ni 1− x Co x O 3 was determined using Equation ).

Cell volume = ((), a^{2} \times c \times \cos 60^{°})

ρ_{normalx - ray} = \frac{Z \times M}{N_{A} \times V_{cell}}

where, “ M ” represents the molecular weight, “ Z ” is the number of formula unit in the unit cell (for the Rhombohedral system), “ N A ” is Avogadro's number.…”

Section: Resultsmentioning

confidence: 99%

“…It involves oxidation-reduction reaction to convert the complex organic dyes to harmless end products. 32 The PCA behavior of La Co-doped La 1−y Gd y Ni 1−x Co x O 3 showed the degradation of 88.6% within 90 minutes of irradiation (Figure 16C). During photocatalytic degradation of dye, electrons are excited from VB to the CB when material is irradiated under light, which resulting in the formation of electronhole pair.…”

Section: Photocatalytic Activity (Pca)mentioning

confidence: 98%

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Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties

2021

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Gadolinium-and Cobalt-doped La 1−y Gd y Ni 1−x Co x O 3 perovskite nanoparticles were synthesized using facile micro-emulsion route to investigate the doping effect of Gadolinium and Cobalt on structural, morphological, dielectric, electrochemical, and photocatalytic activities of LaNiO 3 . The characterization of as-synthesized material was performed using X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), UV-visible, and Raman scattering techniques. Structural analysis of Gd-and Co-doped LaNiO 3 shows single-phase distorted rhombohedral structure with successful doping of Gd and Co and particles size was estimated in the range of 25-45 nm with heterogeneous morphology. The CV (cyclic voltammetry), EIS (electrochemical impedance spectroscopy), and current-voltage (I-V) analysis revealed that the Gd and Co doping enhanced the electrical properties of LaNiO 3 . CV and EIS of Gd-and Co-doped composition (x, y = 0.50) electrode shows higher specific capacitance (148 Fg −1 ) vs undoped LaNiO 3 (95 Fg −1 ). The (I-V) results revealed that conductivity was improved by Gd and Co doping, the conductivity values for composition (x, y = 0.50) were 3.01 × 10 4 S/m vs 2.08 × 10 −3 S/m for undoped LaNiO 3 . Frequency dependent dielectric properties of La 1−y Gd y Ni 1 −x Co x O 3 synthesized material show decreasing trend in dielectric constant, dielectric loss, tangent loss by increase in frequency and AC conductivity was increased by the doping of Gd and Co in LaNiO 3 . Resistivity measurements show a decrease in resistivity by Gd and Co doping. Ferroelectric loop of the Gd-and Co-doped material shows an increased ferroelectric nature than LaNiO 3 . Photoluminescence spectra show an excitation peaks in visible region, which decreases as the dopant content (x, y) was increased. The band gap energy (E g ) was estimated using Tauc's plot and it was observed that by increasing the dopant (x,y) contents, the band gap was decreased (3.25-2.53 eV). Photocatalytic activity of LaNiO 3 and La 1−y Gd y Ni 1−x Co x O 3 was tested for Rhodamine B (RhB) dye under solar light irradiation. Result shows that the doped material was significantly more photocatalytically active than

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“…Crystallite size was in 21‐31 nm range. Cell volume is given by formula in Equation ) 32 . X‐ray density of La 1− y Gd y Ni 1− x Co x O 3 was determined using Equation ).

Cell volume = ((), a^{2} \times c \times \cos 60^{°})

ρ_{normalx - ray} = \frac{Z \times M}{N_{A} \times V_{cell}}

where, “ M ” represents the molecular weight, “ Z ” is the number of formula unit in the unit cell (for the Rhombohedral system), “ N A ” is Avogadro's number.…”

Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Activity (Pca)mentioning

confidence: 98%

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties

2021

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“…The tangent loss values were low at lower frequency, which were increased with frequency and vice versa. This behavior of tangent loss (tanγ) can be attributed to the presence of conduction mechanism and polarization explained in the cases of dielectric constant and dielectric loss (Ajmal et al 2019). The values of dielectric constant decreased sharply in the lower frequency region and decreased linearly in the higher frequency region.…”

Section: Dielectric Propertiesmentioning

confidence: 85%

“…The decline in the dielectric constant is also due to the externally applied field when electric moment is induced in the dielectric material. When high frequency region is reached, induced electric moment and exchange of electrons between Fe +2 and Fe +3 ions cannot harmonize with the applied field and charge carriers did not synchronize with external field and values of dielectric constant are decreased (Ajmal et al 2019;Bibi et al 2019). The high values of dielectric loss in the low frequency region are also attributed to the grain boundaries.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…The perovskite oxides having composition of ABO 3 (A is the rare earth metal cation and B is the transition metal cation) form an important class of practical materials (Parrino et al 2016). The perovskites oxides have wide advanced applications, i.e., in fuel cells, magnetic devices, photocatalysis and sensors (Ajmal et al 2019;Bibi et al 2019;Wang et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Micro-emulsion synthesis of La1 − xCrxFeO3 nanoparticles: effect of Cr doping on ferroelectric, dielectric and photocatalytic properties

Abbas

Bibi

Majid

et al. 2020

International Journal of Chemical Reactor Engineering

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In the present study, La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0) was synthesized by micro-emulsion route and characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Scanning electron microscope (SEM), Energy-dispersive X-ray (EDX) techniques. The dielectric, ferroelectric and photocatalytic properties were investigated and compared with un-doped material. The XRD analysis revealed orthorhombic geometry of La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0), Cr was doped successfully into the lattice structure of LaFeO3 and particles were spherical and in agglomerated form. The grain sizes were recorded to be 15, 16.9, 17.1, 17.65 and 18.3 (nm) for La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0), respectively. EDX analysis confirmed the purity of LaCrFeO3 samples. The lattice parameters, bulk density, X-ray density, crystalline size and porosity were determined were also determined of all the La1 − xCrxFeO3 samples. The dielectric constant and dielectric loss values decreased at higher frequency and Cr concentration affected the dielectric properties. The photocatalytic activity (PCA) was evaluated by degrading Congo Red (CR) dye under solar light irradiation and up to 85.43% dye degradation was achieved within 45 min of irradiation. Phyto-toxicity analysis before and after dye degradation was performed, which revealed the toxicity reduction in response of dye degradation. Results revealed that lanthanum ferrite (perovskite) doping with Cr could possibly be employed to enhance the ferroelectric, dielectric and photocatalytic properties.

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Surface-modified iron oxide nanoparticles for adsorption, photodegradation, and selective removal applications

Obaid,

Halbus

2023

Monatsh Chem

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Effect of Fe and Bi doping on LaCoO3 structural, magnetic, electric and catalytic properties

Cited by 72 publications

References 76 publications

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties

Micro-emulsion synthesis of La1 − xCrxFeO3 nanoparticles: effect of Cr doping on ferroelectric, dielectric and photocatalytic properties

Surface-modified iron oxide nanoparticles for adsorption, photodegradation, and selective removal applications

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Effect of Fe and Bi doping on LaCoO3 structural, magnetic, electric and catalytic properties

Cited by 72 publications

References 76 publications

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO 3 and effect of doping on photochemical, electrochemical, and ferroelectric properties

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO 3 and effect of doping on photochemical, electrochemical, and ferroelectric properties

Micro-emulsion synthesis of La1 − xCrxFeO3 nanoparticles: effect of Cr doping on ferroelectric, dielectric and photocatalytic properties

Surface-modified iron oxide nanoparticles for adsorption, photodegradation, and selective removal applications

Contact Info

Product

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About

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties

Visible‐light‐driven photocatalytic efficiency of Co‐ and Gd‐doped LaNiO ₃ and effect of doping on photochemical, electrochemical, and ferroelectric properties