Visible-Light Photocatalytic Activity of N-Doped TiO₂ Nanotube Arrays on Acephate Degradation

Figure 3

XRD patterns of the pure TiO₂ nanotube arrays and N-doped TiO₂ nanotube arrays annealed at temperatures ranging from 300 to 600°C. Pure TiO₂ nanotube array films: (a) before annealing, (b) at 300°C. N-doped TiO₂ nanotube array films: (c) 300°C, (d) 400°C, (e) 500°C, and (f) 600°C.

(a)

(b)