fig4

Figure 4. (A) Band structures of the PtS₂/g-C₃N₄ vdW heterostructure. (Reproduced with permission^[34]. Copyright 2023, Elsevier); (B) Projected density of states (DOS) of the PtS₂/g-C₃N₄ vdW heterostructure. (Reproduced with permission^[34]. Copyright 2023, Elsevier); (C) Absorption spectrums of the PtS₂/g-C₃N₄ vdW heterostructure under various biaxial strains. (Reproduced with permission^[34]. Copyright 2023, Elsevier); (D) The STH efficiency of other 2D materials compared with PtS₂/g-C₃N₄ vdW heterostructure. In plot (A), the purple and gray lines indicate the contributions from the monolayers PtS₂ and g-C₃N₄, respectively, and the horizontal black dashed line set to zero energy represents the Fermi level. (Reproduced with permission^[34]. Copyright 2023, Elsevier); (E) The direct Z-scheme photocatalytic mechanism for water splitting in the g-C₆N₆/WTe₂ heterostructure. (Reproduced with permission^[35]. Copyright 2022, Elsevier); (F) The variation of driving forces for OER and HER with pH value. (Reproduced with permission^[35]. Copyright 2022, Elsevier).