Figure 7: XRD patterns of the catalysts calcined at different temperatures: (a) Mn12/FA-PG, (b) Mn12/FA-PG/200°C, (c) Mn12/FA-PG/300°C, (d) Mn12/FAPG/ 400°C, (e) Mn12/FA-PG/500°C and (f) Mn12/FA-PG/600°C.