Cyclic Voltammetry Study and Solar Light Assisted Photocatalytic Activity of the CeFeO/CeO/FeO Composite

Overview

Journal Luminescence

Specialties Biochemistry
Biophysics

Date 2024 Nov 23

PMID 39578716

Authors

M Kanimozhi

R Harikrishnan

M Mani

S Kumaresan

A Rajasekar

N Saradha Devi

Shankara G Radhakrishnan

L Sibali

K Kaviyarasu

Affiliations

Soon will be listed here.

Abstract

The semiconducting nature of CeFeO/CeO/FeO nanocomposite has permitted the degradation of the organic toxic dye methylene blue under the irradiation of ultraviolet and visible light portions of solar radiation. Fullprof-assisted Rietveld refinement analysis, performed using the Match software, has revealed the orthorhombic nature of CeFeO. In addition, in the synthesized material, the cubic phase byproduct CeO was found due to the highly oxidizing nature of the cerium element. This occurred due to 6 min microwave irradiation because the microwave-assisted technique offered random distribution of heating during the supply of 800-W power for 30 s, followed by 12 cycles. Additionally, the presence of FeO was also confirmed through Match software-assisted Rietveld refinement analysis through phase matching. During the synthesis, a certain portion of the synthesized CeFeO experienced overheating, leading to phase transformation from CeFeO into FeO and CeO. The unit cell compositions of CeFeO, CeO, and FeO were found in the sample material with 35.54%, 52.43%, and 12.03%, respectively. The appearance of a fingerprint absorption region in the FTIR spectrum around 577.36 and 535.38 cm further confirmed the similarity of these values (577.36 and 535.38 cm) to those obtained from the calculated values obtained by substituting Rietveld refined bond length parameters. The fourth step process in the thermal analysis curve (TGA) revealed the oxidation process, which led to the destruction of the CeFeO phase, causing the transformation of CeFeO into two byproducts (CeO and FeO). This oxidation process permitted in an observable weight gain, which is observed in the thermal analysis curve (TGA). A cyclic voltammetry study (the experimentally measured current-voltage characteristic curve) revealed slightly distorted semirectangular CV curves, confirming the pseudo-capacitive behavior of the synthesized composite.

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