abstract

This work consists of three parts, the first one is focused on the preparation of ZnO and calcination at 500 OC. Moreover, metallized commercial and prepared ZnO by different amounts of Co and Ag were prepared by photo deposition method.The properties of naked and metalized commercial and prepared ZnO were

estimated by Fourier transform infrared (FT-IR) analysis, X-ray diffraction (XRD)

analysis and Atomic force microscope (AFM) analysis. Moreover, theAtomic absorption (A.A) analysis for metalized commercial and prepared ZnO was done.FT-IR analysis for prepared ZnO was obtained by stretching vibrations of the OH

at 3446 cm-1 and a strong band around 500 cm-1 that assigned to find the stretching band of Zn-O. So these results refer to the creation of ZnO.

The new band around 1383-1384 cm-1 occurred when cobalt was loaded on commercial and prepared ZnO surfaces. From the other hand, the new band around (1386-1388) cm-1 was formed when silver was loaded on both commercial and prepared ZnO surfaces.

XRD data was utilized to calculate the mean crystallite sizes and crystallite sizes of naked and metalized commercial and the prepared ZnO by employing the Scherer equation and the modified Scherer equation.

The mean crystallite sizes and crystallite sizes for naked commercial ZnO were increased when loading 0.5%Co and decreased when loading 2%Ag. However, the mean crystallite sizes and crystallite sizes data for naked prepared ZnO were increased with loading 1%Co and 2%Ag.

The AFM images indicated that most of the shapes of naked and metalized commercial and prepared ZnO were semi spherical. Moreover, the most particle sizes were less than the mean crystalline size and crystalline size.

The second part includes studying the effect of different parameters on photo decolourization of methyl green dye with the presence of naked and metalized commercial of ZnO. The parameters involved with the amount and the type of loading metals, dose of catalyst, concentration of dye, initial pH of solution and temperature. However, the third part includes the same parameters studied in the second part but the catalyst is different (naked and metalized prepared ZnO that

calcination at 500 oC