Article Dans Une Revue Journal of Photochemistry and Photobiology A: Chemistry Année : 2025

A novel dual-Z-scheme g-C3N4/BiOCl/Ag2WO4 heterojunction engineered for sunlight-driven photocatalytic degradation of methylene blue and amoxicillin

Résumé

This paper investigates the synthesis of g-C3N4/BiOCl/Ag2WO4 nanocomposites for application in solar energy-driven photodegradation of Methylene Blue dye (MB) and Amoxicillin antibiotic (AMOX). The as-prepared precursor photocatalysts (Ag2WO4, BiOCl, and g-C3N4) and nanocomposite photocatalyst g-C3N4/BiOCl/Ag2WO4 were investigated using a full characterization process to determine their oxidation states (XPS), composition (EDX), morphology (SEM & TEM), structure (FTIR), and crystallinity (XRD). Examination of these characteristics attests to successful synthesis of g-C3N4/BiOCl/Ag2WO4 nanoparticles with enhanced crystallinity. Photocatalysis experiments proved that ternary nanocomposite is highly active towards degrading contaminating molecules, with 98 % for MB and 95 % for AMOX, through redox processes driven by sunlight. Monte Carlo simulation studies reveal that the g-C3N4/BiOCl/Ag2WO4 composite is readily formed, and MB molecules are adsorbed onto its surface in multiple layers, driven by favorable negative adsorption energies. In addition, the recyclability of g-C3N4/BiOCl/Ag2WO4 demonstrates its ability to retain photocatalytic activity across four consecutive cycles. According to active species trapping experiment and UV–vis diffuse reflectance spectroscopy (DRS), a proposed photocatalytic mechanism elucidates the observed enhancement in performance of the g-C3N4/BiOCl/Ag2WO4 system. According to the mechanism, the newly designed dual Z-scheme heterojunction, which promotes the synergistic interaction among the photocatalysts, further accelerates the effective separation and transfer of e/h+ and accordingly greatly improves the photocatalytic degradation efficiency.

Fichier principal
Vignette du fichier
P43 modifié.pdf (15.54 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-05233977 , version 1 (01-09-2025)

Licence

Identifiants

Citer

Brahim Ennasraoui, Mohamed Rhaya, Rahime Eshaghi Malekshah, Youssef Miyah, Said Alahiane, et al.. A novel dual-Z-scheme g-C3N4/BiOCl/Ag2WO4 heterojunction engineered for sunlight-driven photocatalytic degradation of methylene blue and amoxicillin. Journal of Photochemistry and Photobiology A: Chemistry, 2025, 471, pp.116671. ⟨10.1016/j.jphotochem.2025.116671⟩. ⟨hal-05233977⟩
1417 Consultations
12 Téléchargements

Altmetric

Partager

  • More