“…44,59 Several distinct diffraction peaks were found in the XRD pattern of prepared ZnO at 31.94, 34.64, 36.32, 47.68, 56.72, 63.01, 66.68, 68.06, 69.12, 73.12, and 77.52°2q values, which could resemble the plane of (100), ( 002), ( 101), ( 102), ( 110), ( 103), ( 200), ( 112), ( 201), (004), and (202), respectively, of the wurtzite structure of hexagonal ZnO. 60 A peak detected at about 27°2q value in the XRD pattern of ZCN-1 and ZCN-2.5 represents the diffraction phase of the g-C 3 N 4 . The peak in the XRD pattern of ZCN-2.5 was weaker and broader than that of ZCN-1, which corresponded to the decrease of the g-CN crystal phase.…”