Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue (Article De Synthèse) Journal of Hazardous Materials Année : 2021

Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

Résumé

Photocatalytic materials for photocatalysis is recently proposed as a promising strategy to address environmental remediation. Metal-free graphitic carbon nitride (g-C3N4), is an emerging photocatalyst in sulfate radical based advanced oxidation processes. The solar-driven electronic excitations in g-C3N4 are capable of peroxo (O-O) bond dissociation in peroxymonosulfate/peroxydisulfate (PMS/PDS) and oxidants to generate reactive free radicals, namely SO4 center dot- and OH center dot in addition to O-2(center dot-) radical. The synergistic mechanism of g-C3N4 mediated PMS/PDS photocatalytic activation, could ensure the generation of OH center dot radicals to overcome the low reductive potential of g-C3N4 and fastens the degradation reaction rate. This article reviews recent work on heterojunction formation (type-II heterojunction and direct Z-scheme) to achieve the bandgap for extended visible light absorption and improved charge carrier separation for efficient photocatalytic efficiency. Focus is placed on the fundamental mechanistic routes followed for PMS/PDS photocatalytic activation over g-C3N4-based photocatalysts. A particular emphasis is given to the factors influencing the PMS/PDS photocatalytic activation mechanism and the contribution of SO4 center dot- and OH center dot radicals that are not thoroughly investigated and require further studies. Concluding perspectives on the challenges and opportunities to design highly efficient persulfate-activated g-C3N4 based photocatalysts toward environmental remediation are also intensively highlighted.
Fichier principal
Vignette du fichier
Hasija-Advanced2021revised.pdf (11.01 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03139576 , version 1 (12-02-2021)

Identifiants

Citer

Vasudha Hasija, Van-Huy Nguyen, Ajay Kumar, Pankaj Raizada, Venkata Krishnan, et al.. Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review. Journal of Hazardous Materials, 2021, 413, pp.1-14. ⟨10.1016/j.jhazmat.2021.125324⟩. ⟨hal-03139576⟩
333 Consultations
866 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More