The optical and photo-electrochemical characterization of nano-ZnO particles and its application to degradation of Reactive Blue 19 under solar light

The photocatalytic degradation of a binary textile dyes mixture within a new configuration of loop reactor using ZnO thin film-phytotoxicity control

“…Figure 2(a) shows the XRD patterns of the ZnO NPs of the two samples, the 2θ peaks at 31°, 34°, 47°, 56°, 62°, 66°, 67°, 68°and 74°correspond to the reflections of reticular plans (100), ( 002), ( 101), ( 102), ( 110), ( 103), ( 200), ( 112), ( 201) and (004) of the Wurtzite structure in agreement with JCPDS card number 04-008-6994 [43][44][45], matched with the hexagonal symmetry (space group P63mc), which has the following lattice parameters: a = 0.3269 nm and c = 0.5203 nm [41]. No impurities or secondary phases are detected on the patterns.…”

“…40 g•L −1 of ZnO nanoparticles (prepared previously by one step calcination at 420 °C, the synthesis protocol is well-described in Cherif et al [41]) were homogenized in osmosis water under stirring for 3 h, then, the solution was sonicated for 2 h in the ultrasound bath (VWR USC-1). Furthermore, 15 mL of ZnO solution was sprayed on the preheated glass under the same conditions of the Spray Pyrolysis method.…”

“…where α is the absorption hv is the photon energy, A is the constant, E g is the bandgap, and n = 1/2 is for direct allowed transition [41,54].…”