International Journal of Photoenergy

Research Article

Enhanced Photocatalytic Activity of Powders (P25) via Calcination Treatment

Figure 7

SEM images of the P25 powders before (a) and after calcined at 400 (b), 500 (c), and 700°C (d) for 4 h.
265760.fig.007a
(a)
265760.fig.007b
(b)
265760.fig.007c
(c)
265760.fig.007d
(d)