Preparation of Fe-Doped TiO₂ Nanotubes and Their Photocatalytic Activities under Visible Light

Figure 1

The TEM images of as-synthesized samples: (a) pure TNT, (b) Fe-TNT-0.1, (c) Fe-TNT-0.5, (d) Fe-TNT-1, (e) Fe-TNT-3, and (f) Fe-TNT-5.

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