fig6

Figure 6. (A) TEM images of (a) BCN, (b) CN and (c) CN/BCN-0.5% samples; (d-g)TEM EDX elemental mappings of CN/BCN-0.5% sample. (Reproduced with permission^[39]. Copyright 2020, Elsevier); (B) H₂ production rate of different samples of CN/BCN heterostructures under the visible light (λ > 420 nm). (Reproduced with permission^[39]. Copyright 2020, Elsevier); (C) Wavelength-dependent AQE of CN/BCN-0.5% sample. (Reproduced with permission^[39]. Copyright 2020, Elsevier); (D) The electron-hole recombination and electron and hole transfer dynamics in C₇N₆/Sc₂CCl₂ heterostructures, where the time constants are fitted by the exponential function corresponding to three processes. (Reproduced with permission^[40]. Copyright 2022, American Chemical Society); (E) Charge transfer in C₇N₆/Sc₂CCl₂ heterostructure. (Reproduced with permission^[40]. Copyright 2022, American Chemical Society); (F) Processes occurring on the C₇N₆/Sc₂CCl₂ surface at pH 7. The blue and orange short lines stand for intermediate states in HER/OER processes on the undoped heterostructure with or without light-induced bias potential U, whereas the green and purple short lines stand for intermediate states in the OER processes occurring on the doped S atom. (Reproduced with permission^[40]. Copyright 2022, American Chemical Society).