Figure 7

Band gap calculated by Tauc’s plot method from diffuse reflective spectroscopic data for (a) Pr(ZnO), (b) Cu(0.5), (c) Al(0.5), (d) CuAl(0.5) (e) Al(1), (f) Al(3), (g) Al(5), and (h).

Band gap calculated by Tauc’s plot method from diffuse reflective spectroscopic data for (a) Pr(ZnO), (b) Cu(0.5), (c) Al(0.5), (d) CuAl(0.5) (e) Al(1), (f) Al(3), (g) Al(5), and (h).