Figure 3

SEM images of the samples prepared with a pH value of (a) 1, (b) 2, (c) 3, (d) 4, (e) 5 and (f) 6 and SEM-EDX analysis of the samples synthesized with pH = 6 (g and h) (before calcination).
SEM images of the samples prepared with a pH value of (a) 1, (b) 2, (c) 3, (d) 4, (e) 5 and (f) 6 and SEM-EDX analysis of the samples synthesized with pH = 6 (g and h) (before calcination).