Photocatalytic Activity and Optical Properties of Blue Persistent Phosphors under UV and Solar Irradiation

Figure 2

SEM images of samples annealed at (a) 1000°C, (b) 1150°C, (c) 1200°C, and (d) 1300°C. (e) and (f) are a zoom of the samples annealed at 1150°C and 1300°C, respectively.

(a)

(b)

(c)

(d)

(e)

(f)