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

Figure 7

Infrared spectra of the 5 mol% Cu-doped TiO₂ samples at calcination temperature (550°C). (a) 400 cm⁻¹∼1000 cm⁻¹; (b) 1000 cm⁻¹∼1800 cm⁻¹.

(a)

(b)