Morphological influence of BiVO4 nanostructures on peroxymonosulfate activation for highly efficient catalytic degradation of rhodamine B
2021
Missaoui, Khawla | Ouertani, Rachid | Jbira, Elyes | Boukherroub, Rabah | Bessaïs, Brahim
Bismuth vanadate (BiVO₄) nanostructured films were prepared and successfully applied for peroxymonosulfate (PMS) activation for the degradation of rhodamine B (RhB) in aqueous solution. The BiVO₄ thin films were obtained by thermal reaction between electrodeposited bismuth (Bi) films and vanadium precursor. The as-prepared BiVO₄ porous, nanoflowers, and cluster nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and BET analysis. The catalytic performance of BiVO₄ nanostructures has been carefully evaluated in activating PMS for the degradation of RhB. The nanoflower-like BiVO₄ nanostructures exhibit the best catalytic activity. Under optimized conditions, the complete catalytic degradation of RhB using BiVO₄ nanoflowers/PMS system was achieved in 17 min at room temperature as revealed by high-performance liquid chromatography (HPLC) analysis. Quenching experiments suggested that sulfate radicals are the main active species in the degradation process. Additionally, BiVO₄ catalyst remained stable without any apparent activity loss after five cycling runs.
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