fig5

Figure 5. (A) Photocatalytic mechanisms of BiPO₄/Bi₄O₅Br₂. (Reproduced with permission from^[111], Copyright 2023, Elsevier); (B) Photocatalytic mechanisms of KNbO₃/Bi₄O₅Br₂. (Reproduced with permission from^[109]. Copyright 2024, Higher Education Press and Springer Nature; (C) Photocatalytic mechanisms of BrO₃^--bridged Bi₂O₂/Bi(OH)₂. (Reproduced with permission from^[108]. Copyright 2023, American Chemical Society; (D) Photocatalytic mechanisms of Bi₁₂O₁₇Cl₂/BiOCOOH/Bi₂MoO₆. (Reproduced with permission from^[112]. Copyright 2024, Elsevier). NHE: Normal hydrogen electrode.