Dual sulfur defect engineering of Z-scheme heterojunction on Ag-CdS1-x@ZnIn2S4-x hollow core-shell for ultra-efficient selective photocatalytic H2O2 production

S-Scheme Heterojunction Photocatalyst for Photocatalytic H2O2 Production: A Review

“…Although type-II heterojunctions can improve the separation efficiency of photogenerated carriers, they also sacrifice the charge of the strong redox potential, resulting in reduced redox capacity. Z-scheme photocatalysts, initially proposed by Bard in 1979, have found application in photocatalytic H 2 O 2 production due to their effective charge separation and robust redox capabilities [30]. For instance, Cheng et al [31] synthesized Z-scheme Ag/ZnFe 2 O 4 -Ag-Ag 3 PO 4 composites for photocatalytic H 2 O 2 production, which was generated by a continuous two-step one-electron oxygen reduction.…”

Accelerated sonochemical fabrication of MIn2S4 (M = Zn, Mg, Ni, Co) for ultra-high photocatalytic hydrogen peroxide production

“…Photocatalytic production has been widely studied as a green way to produce H 2 O 2 from O 2 and H 2 O [23] , [24] , [25] . As a photocatalyst with low toxic, high photochemical stability, appropriate band gap and excellent redox potential, ZnIn 2 S 4 has great potential in photocatalytic H 2 O 2 production [26] . Although ZnIn 2 S 4 have been widely used in photocatalytic fields, their performances are not satisfying due to the rapid recombination of electron-hole pairs [27] .…”