Enhanced and synergistic catalytic activation by photoexcitation driven S-scheme heterojunction hydrogel interface electric field

The regulation of heterogeneous material properties to enhance the peroxymonosulfate (PMS) activation to degrade emerging organic pollutants remains a challenge. To solve this problem, we synthesize S-scheme heterojunction PBA/MoS2@chitosan hydrogel to achieve photoexcitation synergistic PMS activation. The constructed heterojunction photoexcited carriers undergo redox conversion with PMS through S-scheme transfer pathway driven by the directional interface electric field. Multiple synergistic pathways greatly enhance the reactive oxygen species generation, leading to a significant increase in doxycycline degradation rate. Meanwhile, the 3D polymer chain spatial structure of chitosan hydrogel is conducive to rapid PMS capture and electron transport in advanced oxidation process, reducing the use of transition metal activator and limiting the leaching of metal ions. There is reason to believe that the synergistic activation of PMS by S-scheme heterojunction regulated by photoexcitation will provide a new perspective for future material design and research on enhancing heterologous catalysis oxidation process. The regulation of heterogeneous material properties to enhance the peroxymonosulfate activation remains a challenge. Here, authors synthesize S-scheme heterojunction PBA/MoS2@chitosan hydrogel to achieve photoexcitation synergistic peroxymonosulfate activation driven by interface electric field.

Automated summary

This study achieves synergistic activation of peroxymonosulfate (PMS) through S-scheme heterojunction regulated by photoexcitation. The enhanced reactive oxygen species generation and increased degradation rate of doxycycline are achieved. The 3D polymer chain spatial structure of chitosan hydrogel facilitates PMS capture and electron transport, reducing the use of transition metal activator and leaching of metal ions.