Green Synthesis, Characterization and Antibacterial Activity of Zinc Oxide and Titanium Dioxide Nanoparticles Using Terminalia Catappa and Cymbopogon Citratus Leaf Extract

This study synthesized zinc oxide and titanium oxide nanoparticles using green syntheses method mediated by Terminaliacatappa and Cymbopogon citratus leaves extracts. Zinc nitrate hexahydrate Zn (NO3)2.6H20 and TiO (OH)4 were the precursors for the ZnO NPs and TiO (OH)4 synthesis respectively. Results obtained revealed maximum wavelength of absorption for theZnO-NP (330 nm) and TiO4 (410 nm). Useful functional groups (that are typical for the presence of compounds known for theirreducing properties) were found in the extracts) Synthesized nanoparticles were characterized using UV-visible spectrometer,FTIR, SEM and XRD. XRD pattern matching that of Joint Committee on Powder Diffraction Standards (JCPDS) card for ZnO confirmed the presence of hexagonal ZnO NPs with an average size of 76 nm while the results revealed the anatase and rutile form of TiO2 with an average crystalline size of 79 nm Antimicrobial activities of the synthesized nanoparticles were established for some selected water-borne pathogens (Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosaand Salmonella typhi)