Figure 12

Reflectance diffuse spectra (after Kubelka–Mulk transformation)93 of T1, T2, and T3 lamellar H2Ti3O7 NTs, and (inset) plot (K/S × hν)2 against hν showing the linear fitting to the main linear segment of the curve considering a direct band gap transition., according to the Tauc equation (a). Luminescence emission spectra of T1, T2, and T3 (b).