Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

Abstract

Catalyst‐free visible light assisted Fenton‐like catalysis offers opportunities to achieve the sustainable water decontamination, but the synergistic decontamination mechanisms are still unclear, especially the effect of proton transfer process (PTP). The conversion of peroxymonosulfate (PMS) in photosensitive dye‐enriched system was detailed. The photo‐electron transfer between excited dye and PMS triggered the efficient activation of PMS and enhanced the production of reactive species. Photochemistry behavior analysis and DFT calculations revealed that PTP was the crucial factor to determine the decontamination performance, leading to the transformation of dye molecules. The excitation process inducing activation of whole system was composed of low energy excitations, and the electrons and holes were almost contributed by LUMO and HOMO. This work provided new ideas for the design of catalyst‐free sustainable system for efficient decontamination.

Chalcopyrite as an oxidants activator for organic pollutant remediation: A review of mechanisms, parameters, and future perspectives

“…This is primarily due to their flexibility, cost-effectiveness, and high efficiency as remediation technologies. These oxidants can be activated using various methods and activators, including ultraviolet irradiation, heat, carbon materials, microwave, ultrasound, catalyst-free systems, and transition metals [ [15] , [16] , [17] , [18] ]. However, the application of some activators may be limited due to various factors.…”