Preparation and Characterization of Ni-Doped TiO₂ Materials for Photocurrent and Photocatalytic Applications

Figure 14

(a) UV-vis transmittance spectra of Ni-doped TiO₂ (Ni = 0, 0.1, 0.5, 1, 5, and 10 at. wt.%) thin films formed 600°C for 30 min, and their corresponding transformed spectra showing direct bandgap (b) and indirect bandgap (c) values.

(a)

(b)

(c)