Efficient removal of TBBPA with a Z-scheme BiVO4-(rGO-Cu2O) photocatalyst under sunlight irradiation.
Chemosphere
; 308(Pt 2): 136259, 2022 Dec.
Article
em En
| MEDLINE
| ID: mdl-36057348
ABSTRACT
In this study, reduced graphene oxide (rGO) was used to fabricate a Z-scheme BiVO4-(rGO-Cu2O) photocatalyst for the degradation of Tetrabromobisphenol A (TBBPA) under sunlight irradiation. The photocatalyst was synthesized using a three-step method BiVO4-(rGO-Cu2O) photocatalyst with an rGO loading of 1% and (rGO-Cu2O) to BiVO4 ratio of 50% achieved the best degradation effect for TBBPA removal. Electron paramagnetic resonance spectroscopy (EPR) confirmed that the charge transfer path of BiVO4-(rGO-Cu2O) follows that of Z-scheme photocatalysts. Moreover, the addition of rGO increases the charge transfer efficiency. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to detect and analyze intermediate products, allowing the proposal of the main degradation pathway of TBBPA. Photogenerated electrons of BiVO4-(rGO-Cu2O) were then transferred into the conduction band of Cu2O. Cu2O is located in the surface layer, which has the most effective contact area with pollutants, and therefore has a good outcome for the photocatalytic reduction of TBBPA. Photogenerated electrons (e-) and hydroxyl radicals (âOH) are the main factors affecting TBBPA degradation. The degradation process of TBBPA includes electron reduction debromination, hydroxylation, and ß-cleavage. In our work, BiVO4-(rGO-Cu2O) was successfully synthesized to degrade TBBPA; this study brings forth a novel approach for the degradation of halogenated organic pollutants using a Z-scheme photocatalytic composite.
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MEDLINE
Assunto principal:
Luz Solar
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Poluentes Ambientais
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article