Figure 10

Products prepared at different reaction time. Powder XRD patterns (a), FESEM images of products synthesized with ${\mathrm{Cu}}^{2+}:{\text{S}}_2{\text{O}}_3{}^{2-}$ mole ratio of 1: 2 at 155°C for 1 hour (b), 3 hours (c) and 8 hours (d).