Figure 4

(a) UV–VIS diffuse reflectance spectra of pure WO3, 1% Ag/WO3 and 3% Ag/WO3. (b) Tauc plot of pure WO3, 1% Ag/WO3 and 3% Ag/WO3.

(a) UV–VIS diffuse reflectance spectra of pure WO3, 1% Ag/WO3 and 3% Ag/WO3. (b) Tauc plot of pure WO3, 1% Ag/WO3 and 3% Ag/WO3.