“…Figure 1 exhibits the XRD pattern of TU, ZU, TZU95, TZU90, TZU85, TZU80, TZU75 and TZU70. As shown in Figure 1, the characteristic peaks of TU, observed at 2θ = 25.3 • , 37.8 • , 48.0 • , 53.9 • , 55.1 • , 62.7 • , 68.9 • , 70.3 • and 75.1 • , correspond to the reflection planes of (101), ( 004), ( 200), ( 105), ( 211), ( 204), ( 116), ( 220) and (215), respectively, which indicates the formation of TiO 2 in the anatase phase and clearly matches with the reported pattern (JCPDS 21-1272) [25]. For the ZU sample shown in Figure 1, the characteristic peaks of ZnO appear at 31.63 • , 34.29 • , 36.32 • , 47.54 • , 56.72 • , 62.83 • and 67.93 • and can be indexed to the planes of (100), (002), (101), (102), (110), ( 103) and (112), which indicates the existence of the hexagonal wurtzite structure of ZnO (JCPDS 36-1451) [26].…”