Preparation, Characterisation, and Photocatalytic Behaviour of Co-TiO₂ with Visible Light Response

Figure 2

Diffuse reflectance spectra of TiO₂ (a); Co(0.2%)-TiO₂ (b); Co(0.5%)-TiO₂ (c). The inset shows measurements on an expanded scale. The final calcination temperature for all samples was 400^°C.