Research Article

Mechanistic Study of Visible-Light-Induced Photodegradation of 4-Chlorophenol by TiO2−xNx with Low Nitrogen Concentration

Figure 4

Unit cells of TiO2 (anatase) (a) and N-doped TiO2 (b). The red, gray, and blue spheres represent the O, Ti, and N ions, respectively.
759306.fig.004a
(a)
759306.fig.004b
(b)