International Journal of Photoenergy / 2013 / Article / Fig 4

Review Article

Fabrication, Modification, and Emerging Applications of TiO2 Nanotube Arrays by Electrochemical Synthesis: A Review

Figure 4

Schematic of energy level of pure TiO2 (a) and corresponding modification ((b)–(d)). (b) Doping or dye-sensitization, semiconductors (c), and noble metals (d) coupling.
761971.fig.004a
(a)
761971.fig.004b
(b)
761971.fig.004c
(c)
761971.fig.004d
(d)

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