Preparation and Study of the Structural and Optical Properties of TiO2 – Ag-ZnO Nanoparticles

Abstract

TiO₂ ,Ag, ZnO, TiO₂/Ag NPs and TiO₂/Ag/ZnO NPs were prepared using pulsed laser ablation in liquids (PLAL) Technique. The effect of number of pulses ( 550, 650, 800) on the structural and optical properties of nanoparticles prepared in distilled water (DW) as growth media were examined using a Q-Switched Nd-YAG laser at wavelength (1064 nm) , ablation energy (610 mJ). As for the (Ag NPs,TiO2 NPs, ZnO NPs, TiO₂/Ag and TiO₂/Ag/ZnO NPs) they were hybridized by the volumetric method. The results of (FE-SEM) for samples prepared with distilled water (DW) showed that the Particle size was (39.1, 62.4, 23.8 nm) for (Ag NPs) and the Particle size (34.26, 49.04, 32.1 nm) for (TiO₂ NPs), and the Particle size (36.54 , 37.86, 30.54 nm) for Zinc Oxide NPs, hybrid (TiO₂/Ag) nanoparticles was the Particle size nanoparticles (44.17, 33.73, 42.91 nm), and hybrid (TiO₂/Ag/ZnO) nanoparticles was the Particle size nanoparticles (53.58 , 45.15  nm). The FTIR results indicated that vibration coupling (Ag-O),   (Ti-O), and the absorption beam appears the beam vibration ( H-O). and that the absorption beam appearing near the wave number of vibration of Zn-O. The optical properties of (Ag NPs,TiO2 NPs, ZnO NPs, TiO₂/Ag and TiO₂/Ag/ZnO NPs)  The results in pulsed 800 of (UV-Vis) indicated a characteristic peak of  range  (199-200) and (403-411 nm) wavelength. On biological application, (Ag NPs,TiO2 NPs, ZnO NPs, TiO₂/Ag and TiO₂/Ag/ZnO NPs) prepared with different laser standards in distilled water were used as anti-bacterial agents. (Staphylococcus aureus, Escherichia coli, Proteus mirabilis and genus Streptococcus) indicated the highest bacterial inhibition in the hybrid TiO₂-Ag- ZnO.