Figure 9

Products prepared at different ${\mathrm{Cu}}^{2+}:{\text{S}}_2{\text{O}}_3{}^{2-}$mole ratio. Powder XRD patterns (a), FESEM images of products synthesized at 155°C for 12 hours with ${\mathrm{Cu}}^{2+}:{\text{S}}_2{\text{O}}_3{}^{2-}$ mole ratio of 1: 2.5 (b), 1: 3 (c) and 1: 5 (d).