Figure 2

(a) UV-Vis Absorbance spectrum of the CCTO (b) plot between Kubelka-munk function (F(R) hʋ)2 and photon energy (hʋ) shows direct allowed transition.
(a) UV-Vis Absorbance spectrum of the CCTO (b) plot between Kubelka-munk function (F(R) hʋ)2 and photon energy (hʋ) shows direct allowed transition.