Figure 3
From: Mechano-synthesized orange TiO2 shows significant photocatalysis under visible light

(a) Diffuse reflectance spectra of TiO2 milled with melamine as a function of milling time. Reflectance for TiO2 milled with melamine as a function of (b) milling time, (c) revolution speed (Fig. S3a), and (d) melamine concentration (Fig. S3b), measured at 450 nm. (e) N and C concentrations in TiO2 as a function of the melamine concentration.