Constructing BiOI–BiOBr/TiO2 nanocomposites by using a double solvothermal method for enhanced photocatalytic activity under visible light irradiation

Fabrication of ternary nanocomposites for boosting photocatalytic activity has attracted growing research interest over the past decades. In this work, a series of BiOI–BiOBr/TiO 2 (Bi I –Bi Br /Ti DS ) ternary nanocomposites were synthesized by employing a double solvothermal (DS) method. The micro...

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Published in:Journal of materials science. Materials in electronics 2023-08, Vol.34 (22), p.1645, Article 1645
Main Authors: Murugan, Gavaskar, Ragesh Nath, R., Ramacharyulu, P. V. R. K., Maity, Amarendra Nath, Koli, Valmiki B.
Format: Article
Language:English
Subjects:
Catalytic activity
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Clean energy
Electrochemical analysis
Light irradiation
Materials Science
Nanocomposites
Optical and Electronic Materials
Optical properties
Photocatalysis
Photocatalysts
Photodegradation
Reaction mechanisms
Rhodamine
Scavenging
Solar energy
Titanium dioxide
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Summary:Fabrication of ternary nanocomposites for boosting photocatalytic activity has attracted growing research interest over the past decades. In this work, a series of BiOI–BiOBr/TiO 2 (Bi I –Bi Br /Ti DS ) ternary nanocomposites were synthesized by employing a double solvothermal (DS) method. The microstructure, morphology, structural, optical, chemical, and electrochemical properties of the synthesized nanocomposites were systematically studied using various spectroscopic techniques. Their applications for the photocatalytic degradation of rhodamine B (RhB) and tetracycline (TC) under visible light irradiation have been demonstrated. The (1:1) BiOI–BiOBr/TiO 2 (Bi I –Bi Br /Ti DS 1 ) ternary nanocomposite exhibits 3 times and 1.5 times higher photocatalytic degradation of RhB as compared to bare TiO 2 double solvothermal (Ti DS ) and the binary nanocomposites, respectively. Similarly, for the tetracycline degradation, it is 4.4 times higher compared to Ti DS and 2.1 times higher than binary nanocomposites. Scavenging experiments were carried out to assess the role of active radical species responsible for the degradation of model organic pollutants. A possible reaction mechanism is proposed. Remarkably, the Bi I –Bi Br /Ti DS 1 photocatalyst retained excellent stability even after several cycles. Additionally, the decay studies of EPR signals display nice correlation with the photocatalytic activity. This research sheds light on a promising way to fabricate the highly efficient, stable, and visible-light-driven ternary nanocomposites that can be used as photocatalysts to help clean up the environment using solar energy.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-023-11056-8