Journal of Nanomaterials / 2015 / Article / Fig 3

Research Article

Synthesis of Monodisperse Walnut-Like SnO2 Spheres and Their Photocatalytic Performances

Figure 3

SEM images of the SnO2 products prepared with 4 M KOH for (a) 4 h, (b) 6 h, (c) 12 h, and (d) 15 h.
(a)
(b)
(c)
(d)