(a)
(b)
(c)
Figure 3: SEM images of DGO/BG composites with different loading ratio and reaction temperature. BG (a), 5 wt.% DGO/BG (b), and 1 wt.% DGO/BG (c) synthesized with different reaction temperatures: (A) 600°C, (B) 800°C, (C) 1000°C, and (D) 1200°C.