The Vibrational Spectroscopy of the Valence Bonds of Cu-Doped TiO₂ Using Electronegativity Principle Quantitative Calculations

Figure 4

Full wave number section of the Infrared Spectra of the Cu-doped TiO₂ samples with different doping concentrations at calcination temperature (550°C).(a) Undoped. (b) 2.5 mol%Cu. (c) 5 mol%Cu.

(a)

(b)

(c)