Journal
MATERIALS LETTERS
Volume 324, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132682
Keywords
Nanocomposites; Semiconductors; Heterojunction; Photocatalysis; Peroxydisulfate
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The coupling of photocatalysis with persulfate-based oxidation is considered a promising strategy for increasing the overall reaction efficiency for organic pollutants removal, with the design of an appropriate semiconductor heterojunction being key. In this study, a p-n heterojunction was fabricated by combining p-type semiconductor BiOI with n-type Fe3O4, resulting in significantly accelerated degradation of high concentration Rhodamine B under visible light illumination. The high activity, stability, and magnetic properties of this heterojunction pave the way for practical applications.
The coupling of photocatalysis with persulfate-based oxidation has been regarded as a promising strategy to increase the overall reaction efficiency for organic pollutants removal. Designing an appropriate semiconductor heterojunction is a crucial prerequisite for this strategy. In this work, a p-n heterojunction was fabricated by combining p-type semiconductor BiOI with n-type Fe3O4. A facile in-situ precipitation method was developed to anchor Fe3O4 nanoparticles onto flower-like BiOI. Various instrumental techniques were employed to characterize this heterojunction. The p-n junction formation could remarkably expedite the degradation of high concentration Rhodamine B (RhB, 100 mg L-1) via peroxydisulfate activation under visible light illumination. The high activity, good stability and magnetic nature of this heterojunction would pave the way for practical applications.
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