fig1

Figure 1. (A) Diagram depicting the synthetic process of the Cs₃Bi₂Br_9-x@AgBr core–shell heterojunction; (B) Mechanism of electron transfer in the Cs₃Bi₂Br_9-x@AgBr photocatalyst under light illumination; (C) Photocatalytic performance comparison of CBB, AgBr, and various Cs₃Bi₂Br_9-x@AgBr-X composites (where X = 3, 6, 8). Reprinted with permission. Copyright 2024, American Chemical Society^[111]; (D) Diagram illustrating the preparation of the W₁₈O₄₉/CsPbBr₃ heterojunction; (E) Representation of the band structures between CPB and W₁₈O₄₉ under light irradiation. The E_f bending at the interface was considered; (F) Photocatalytic toluene oxidation and CO₂ reduction over pure W₁₈O₄₉ ultrathin NWs, pure CPB, and WOCPB heterojunction. Reproduced with permission, Copyright 2024, Elsevier^[117]. CBB: Cs₃Bi₂Br₉; CPB: CsPbBr₃; E_f: electric field; NWs: nanowires; WOCPB: W₁₈O₄₉/CsPbBr₃.