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

Journal of hazardous materials, 2021-07, Vol.413, p.1-14 [Peer Reviewed Journal]

Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0304-3894 ;EISSN: 1873-3336 ;DOI: 10.1016/j.jhazmat.2021.125324 ;PMID: 33582464

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  • Title:
    Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review
  • Author: Hasija, Vasudha ; Nguyen, Van-Huy ; Kumar, Ajay ; Raizada, Pankaj ; Krishnan, Venkata ; Khan, Aftab Aslam Parwaz ; Singh, Pardeep ; Lichtfouse, Eric ; Wang, Chuanyi ; Thi Huong, Pham
  • Subjects: Catalysis ; Chemical Sciences ; Continental interfaces, environment ; Coordination chemistry ; Engineering Sciences ; Environmental Engineering ; Environmental Sciences ; Optics ; Photonic ; Sciences of the Universe
  • Is Part Of: Journal of hazardous materials, 2021-07, Vol.413, p.1-14
  • Description: 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.
  • Publisher: Elsevier
  • Language: English
  • Identifier: ISSN: 0304-3894
    EISSN: 1873-3336
    DOI: 10.1016/j.jhazmat.2021.125324
    PMID: 33582464
  • Source: Hyper Article en Ligne (HAL) (Open Access)

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