Lanthanum Ferrite Ceramic Powders: Synthesis, Characterization and Electrochemical Detection Application

The perovskite-type lanthanum ferrite, LaFeO , has been prepared by thermal decomposition of obtained lanthanum ferrioxalate compound precursor, LaFe(C O ) ·3H O. The oxalate precursor was synthesized through the redox reaction between 1,2-ethanediol and nitrate ion and characterized by chemical ana...

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Bibliographic Details
Published in:Materials 2020-04, Vol.13 (9), p.2061
Main Authors: Dumitru, Raluca, Negrea, Sorina, Ianculescu, Adelina, Păcurariu, Cornelia, Vasile, Bogdan, Surdu, Adrian, Manea, Florica
Format: Article
Language:English
Subjects:
Acids
Aqueous solutions
Boron
Ceramic powders
Chemical analysis
Chromatography
Diamonds
Electrical measurement
Electrochemical analysis
Electrodes
Emission analysis
Ferrites
Field emission microscopy
Fourier transforms
Infrared analysis
Investigations
Lanthanum
Lanthanum compounds
Ligands
Methods
Microscopy
Nitrates
Oxidation
Perovskites
Pollutants
Precursors
Software
Submerging
Thermal analysis
Thermal decomposition
Transmission electron microscopy
Voltammetry
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Summary:The perovskite-type lanthanum ferrite, LaFeO , has been prepared by thermal decomposition of obtained lanthanum ferrioxalate compound precursor, LaFe(C O ) ·3H O. The oxalate precursor was synthesized through the redox reaction between 1,2-ethanediol and nitrate ion and characterized by chemical analysis, infrared spectroscopy, and thermal analysis. LaFeO obtained after the calcination of the precursor for at least 550-800 °C/1 h have been investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). A boron-doped diamond electrode (BDD) modified with LaFeO ceramic powders at 550 °C (LaFeO /BDD) by simple immersion was characterized by cyclic voltammetry and tested for the voltammetric and amperometric detection of capecitabine (CCB), which is a cytostatic drug considered as an emerging pollutant in water. The modified electrode exhibited a complex electrochemical behaviour by several redox systems in direct relation to the electrode potential range. The results obtained by cyclic voltammetry (CV), differential-pulsed voltammetry (DPV), and multiple-pulsed amperometry proved the electrocatalytic effect to capecitabine oxidation and reduction and allowed its electrochemical detection in alkaline aqueous solution.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13092061