fig9

Figure 9. (A) High magnification TEM images of pure ZnS nanorods; (B) TEM images of NG-ZnS composite; (C) Comparison of hydrogen production rates on different photocatalysts; (D) Time-cycle photocatalytic hydrogen production over NG-ZnS composite; (E) The energy level diagram for NG-ZnS composite in Na₂S/Na₂SO₃ aqueous solution. Copyright 2018, Elsevier^[23]. TEM: Transmission electron microscopy; ZnS: Zinc sulfide; NG-ZnS: N-doped graphene-supported ZnS.