Procedure Optimization for Green Synthesis of Zn Nanoparticles by Yucca gloriosa Leaf Extract

Introduction: Metal nanoparticles are widely studied due to their special properties. In order to utilize and optimize chemical or physical properties of nanoparticles, a lot of research has been done to control the size and shape, which is important in their physical, chemical and optical properties[1]. In recent years, using ZnO nanoparticle in the treatment of cancer has been reported by many researchers[2]. In this study dH2O as the environmental friendly solvent, Yucca gloriosa extracts as the reducing agent, and Curcumin from turmeric extract, as the stabilizing agent were used. A central composite design was used to evaluate the effect of Time, ratio of the extracts to the metal and pH in synthesis of nanoparticle and finding an optimum condition.Materials and Methods: 8g of plant materials extract boiled in dH2O for 5 minutes. Aqueous solutions of (0.01 M) were prepared in 3 different pH values- 4, 6, and8. Different ratio of extracts, and Zn solutions were mixed-10:90, 25:75, and 50:50. The mixtures were remained for 40, 80 and 120 minutes at room temperature. Finally the turmeric extract was added to the solutions. ZnONPs were characterized by UV-Vis spectroscopy and FE-SEM.Results and Conclusions: Response surface plot illustrate that the most effective parameter is ratio of the extracts to metal. Optimum condition was found to be time=45, pH=6.8 and % Ex=79.5. UV-Vis spectroscopy was used to characterization of ZnONPs and their size and morphology were studied by FESEM.

Keywords:

Green synthesis , Zinc oxide nanoparticles , Yucca gloriosa , Response surface methodology