Synthesis and Structural, Dielectric and Photocatalytic Properties of (Ti, La)-co-Doped Calcium Ferrite Ceramic Powders

This study reports the effects of titanium and lanthanum doping on the structural, morphological, electrical, optical and photocatalytic properties of CaFe 2 O 4 spinel ferrites. The ceramic powders were prepared by sol–gel method. The X-ray diffraction analysis confirmed well-crystallized single-ph...

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Bibliographic Details
Published in:Arabian journal for science and engineering (2011) 2022-06, Vol.47 (6), p.7657-7667
Main Authors: Priya, A. Sathiya, Geetha, D., Madhavan, J.
Format: Article
Language:English
Subjects:
Calcium ferrites
Catalytic activity
Ceramic powders
Crystallization
Degradation
Dielectric properties
Engineering
Humanities and Social Sciences
Lanthanum
Lattice strain
Light irradiation
Morphology
multidisciplinary
Nyquist plots
Optical properties
Photocatalysis
Photoluminescence
Pollutants
Research Article-Physics
Room temperature
Science
Sol-gel processes
Titanium
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Summary:This study reports the effects of titanium and lanthanum doping on the structural, morphological, electrical, optical and photocatalytic properties of CaFe 2 O 4 spinel ferrites. The ceramic powders were prepared by sol–gel method. The X-ray diffraction analysis confirmed well-crystallized single-phase orthorhombic structure for all the compositions. The related parameters such as average particle size, density and lattice strain were calculated. Scanning electron microscopy (SEM) of the samples revealed no significant change in morphology with dopant concentration. The dielectric properties of synthesized ferrites materials were carried out at room temperature . The doped ferrites were found to exhibit high dielectric constant, low loss and enhanced conductivity. The Nyquist plot demonstrated the non-Debye behaviour of the samples. The photocatalytic efficiency was assessed using UV–Vis spectroscopy, which elucidated the narrow energy bandgap of the prepared samples. The photoluminescence study favoured the photocatalytic activity of the doped ferrites. The photocatalytic performance of the prepared samples was demonstrated in the effective degradation of methyl blue under visible-light irradiation. Thus, the (Ti, La)-doped CaFe 2 O 4 ferrites prove to be visible-light photocatalysts exhibiting high efficiency in pollutant degradation.
ISSN:2193-567X
1319-8025
2191-4281
DOI:10.1007/s13369-021-06520-8