Persulfate-aided modified graphitic carbon nitride-based photocatalysts for wastewater treatment: synergistic mechanism

Vasudha Hasija, Anita Sudhaik, Pardeep Singh, Vijay Kumar Thakur

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


The metal-free graphitic carbon nitride (GCN) has ignited research in the realm of sulfate radical-based AOPs for aqueous pollutant degradation owing to the tunable optoelectronic properties. Upon light irradiations, the electronic excitations in GCN cause peroxo (O-O) bond cleavage in peroxydimonosulfate (PDS) and peroxymonosulfate (PMS) oxidants to release SO4 − and ·OH reactive oxidative species. The SO4 − radicals benefited from higher oxidation potential (2.5–3.1V), longer half-life period (4×10−5s), and responsiveness in the pH range. The synergistic mechanism of GCN-mediated PS/PMS photoactivation confirms the generation of ·OH to overcome the poor reductive potential of GCN and fastens the degradation rate of the reaction. With the advancement in surface modification strategies, researchers have explored the methods of introducing functional groups for increasing the surface-active sites to activate PMS/PDS over GCN.

Original languageEnglish
Title of host publicationAdvanced Functional Materials and Methods for Photodegradation of Toxic Pollutants
Number of pages11
ISBN (Electronic)9780323959537
ISBN (Print)9780323959544
Publication statusPrint publication - 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Inc. All rights reserved.


  • graphitic carbon nitride
  • mechanism
  • Peroxymonosulfate
  • photocatalysis
  • pollutant degradation
  • surface functionalization


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