Green Synthesis of Zinc Oxide Nanoparticles using Basilica Leaf Extract and Their Potential Effect Application in Sunscreens

This diploma thesis focuses on the optimization of operating conditions for the green synthesis of  ZnO  nanoparticles, using Ocimum basilicum leaf extract as a reducing and stabilizing agent. Ocimum basilicum leaf extract as a non-toxic reducing and stabilizing agent, as well as characterization studies using X-ray diffraction (XRD) and infrared spectroscopy (IR). Optimization of operating conditions includes the variation of parameters such as temperature and pH. These influence the size, morphology and properties of the synthesized nanoparticles. In addition, we also addressed the preparation of solar cream based on zinc oxide, followed by pH tests, evaluation of antibacterial activity and determination of SPF levels, to guarantee their efficiency. To optimize the effect of T and pH, our results show that that only pH has an effect on the yield and size of NP's. The FTIR and XRD characterization of NP's confirms the formation and crystallization of the products obtained. The creams prepared with zinc oxide show an anti-irritant and protective against solar effects confirmed by the antibacterial effect and SPF test.