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

Photocatalytic materials for photocatalysis is recently proposed as a promising strategy to address environmental remediation. Metal-free graphitic carbon nitride (g-C3N4), an emerging photocatalyst in sulfate radical based advanced oxidation processes. The solar-driven electronic excitations g-C3N4 are capable of peroxo (O?O) bond dissociation peroxymonosulfate/peroxydisulfate (PMS/PDS) and oxidants generate reactive free radicals, namely SO4•? OH• addition O2•? radical. synergistic mechanism mediated PMS/PDS photocatalytic activation, could ensure the generation radicals overcome low reductive potential fastens degradation reaction rate. This article reviews recent work on heterojunction formation (type-II direct Z-scheme) achieve bandgap extended visible light absorption improved charge carrier separation efficient efficiency. Focus placed fundamental mechanistic routes followed activation over g-C3N4-based photocatalysts. A particular emphasis given factors influencing contribution that not thoroughly investigated require further studies. Concluding perspectives challenges opportunities design highly persulfate-activated photocatalysts toward remediation also intensively highlighted.