Synthesis, characterization and properties of sulfate-modified silver carbonate with enhanced visible light photocatalytic performance - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue RSC Advances Année : 2023

Synthesis, characterization and properties of sulfate-modified silver carbonate with enhanced visible light photocatalytic performance

Résumé

Sulfate-modified Ag2CO3 was successfully synthesized via a simple precipitation method. Its visible light photocatalytic performance against the removal of Orange G was found to be significantly enhanced in comparison with the one of pure Ag2CO3. While SO42−-Ag2CO3 ensured a removal efficiency of 100% of OG within 30 min, the unmodified Ag2CO3 exhibited a degradation threshold at hardly 60%. Likewise, the degradation rate constant in the presence of SO42−-Ag2CO3 photocatalyst was assessed to be twice that determined upon the involvement of pristine Ag2CO3. Furthermore, Total Organic Carbon (TOC) measurements evidenced the occurrence of a quasi-total mineralization of the dye pollutant upon the use of SO42−-Ag2CO3 photocatalyst. Scavenger experiments highlighted the dominant role of photo-induced h+ along with ˙O3− ozonide radicals in the OG photocatalytic oxidation mechanism. Reuse cycles revealed that the modification by SO42− is a promising route to improve the stability of silver carbonate against photocorrosion. All these improvements could be ascribed to electronic transfer from the upper SO42− HOMO to the lower Ag2CO3 conduction band.
Fichier principal
Vignette du fichier
Ghazi.pdf (1.14 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04261486 , version 1 (02-11-2023)

Licence

Identifiants

Citer

Sara Ghazi, Benaissa Rhouta, Claire Tendero, Francis Maury. Synthesis, characterization and properties of sulfate-modified silver carbonate with enhanced visible light photocatalytic performance. RSC Advances, 2023, 13 (33), pp.23076-23086. ⟨10.1039/D3RA03120A⟩. ⟨hal-04261486⟩
15 Consultations
21 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More