Facile Hydrothermal Synthesis of SnO₂ Nanospheres as Photocatalysts

Figure 3

Variations in absorption spectra of five organic dye solutions with SnO₂ nanospheres for different time intervals; (a) methylene blue; (b) rhodamine B; (c) methyl orange; (d) Congo red.

(a)

(b)

(c)

(d)