Fig. 6. Strategies to improve the performance of nanowire photoanodes.

(A and E) Doping of TiO₂ photoanodes and corresponding IPCE spectra (E), reproduced with permission from Hoang et al. (129). (B, C, F, and G) Core-shell nanowire heterojunctions. (B, F, and G) WO₃|BiVO₄ electrode with corresponding IPCE spectra (F) and LSV plots (G), reproduced with permission from Rao et al. (140). (C) ZnO|SnO₂|BiVO₄ nanowire array, reproduced with permission from Bielinski et al. (139). (D) Sensitization of ZnO nanowires with CdTe quantum dots, reproduced with permission from Chen et al. (146). (H) LSV traces of TiO₂ sensitized with CdS, reproduced with permission from Ai et al. (145).