fig12

Figure 12. (A) Diagram illustrating the S-scheme charge transfer within the Bi₂Sn₂O₇/Bi₂MoO₆ heterojunction. (B) Five possible adsorption configurations of the N₂ molecule on the Bi₂MoO₆ plane, Bi₂Sn₂O₇ plane, and Bi₂Sn₂O₇/Bi₂MoO₆. (A and B) Reproduced with permission from^[139]. Copyright 2026, Elsevier; DMPO spin-trapping Electron Spin Resonance (ESR) spectra of as-prepared samples detected in (C) methanol. (D) The inferred electronic structure model and the mechanism of photocatalytic nitrogen fixation. (C and D) Reproduced with permission from^[132]. Copyright 2023, Elsevier. BOB: BiOBr; BSO: Bi₂Sn₂O₇; BSOB: Bi₂Sn₂O₇; IEF: built-in electric field; DMPO: projected density of states.