Reductive Photodegradation of 4,4′-Isopropylidenebis(2,6-dibromophenol) on Fe3O4 Surface

Background: Advanced Oxidation Processes (AOPs) are the water treatment techniques that are commonly used forthe decomposition of the non-biodegradable organic pollutants. However, some pollutants are electron deficient and thus resistant to attack by reactive oxygen species (e.g., polyhalogenated c...

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Published in:Materials 2023-06, Vol.16 (12), p.4380
Main Authors: Kisała, Joanna, Vasile, Bogdan Stefan, Ficai, Anton, Ficai, Denisa, Wojnarowska-Nowak, Renata, Szreder, Tomasz
Format: Article
Language:English
Subjects:
Chemical contaminants
Dibromophenol
Experiments
Iron oxides
Morphology
Oxidation
Photocatalysis
Photocatalysts
Photodegradation
Pollutants
Quantum chemistry
Surface properties
Tetrabromobisphenol A
Water treatment
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Summary:Background: Advanced Oxidation Processes (AOPs) are the water treatment techniques that are commonly used forthe decomposition of the non-biodegradable organic pollutants. However, some pollutants are electron deficient and thus resistant to attack by reactive oxygen species (e.g., polyhalogenated compounds) but they may be degraded under reductive conditions. Therefore, reductive methods are alternative or supplementary methods to the well-known oxidative degradation ones. Methods: In this paper, the degradation of 4,4′-isopropylidenebis(2,6-dibromophenol) (TBBPA, tetrabromobisphenol A) using two Fe3O4 magnetic photocatalyst (F1 and F2) is presented. The morphological, structural and surface properties of catalysts were studied. Their catalytic efficiency was evaluated based on reactions under reductive and oxidative conditions. Quantum chemical calculations were used to analyse early steps of degradation mechanism. Results: The studied photocatalytic degradation reactions undergo pseudo-first order kinetics. The photocatalytic reduction process follows the Eley-Rideal mechanism rather than the commonly used Langmuir-Hinshelwood mechanism. Conclusions: The study confirms that both magnetic photocatalyst are effective and assure reductive degradation of TBBPA.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16124380