Figure 5

Products prepared at different reaction temperatures. 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 for 12 hours at 65°C (b), 95°C (c) and 125°C (d).