High-Efficiently Photoelectrochemical Hydrogen Production over Zn-Incorporated TiO₂ Nanotubes

Figure 3

TEM images of synthesized Zn-TNP and Zn-TNT: (a) TNP, (b) TNT, (c) 0.001 mol% Zn-TNP, (d) 0.001 mol% Zn-TNT, (e) 0.01 mol% Zn-TNP, (f) 0.01 mol% Zn-TNT, (g) 0.1 mol% Zn-TNP, and (h) 0.1 mol% Zn-TNT.

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