• J. Jeyasundari
• P. Vengatesh Priya
• A.S. Sakthi Athithan
• A. Naveena

In the field of environmental science, metal oxide nanocomposite has gained a great attention for both theoretical and experimental aspects of their upgradation because of their wide range of practical applications such as catalysts, sensor, biomedicine and optoelectronics. Among all nanocomposites, Copper oxide –Zinc oxide (CuO-ZnO) has attracted more research due to their excellent tunable catalytic, electrical, optical, magnetic properties and environmental-friendly nature. In the present study, CuO-ZnO nanocomposite (NC) was synthesized by using simple chemical precipitation technique, followed by oven drying in the temperature range of 60-70˚C. The synthesis was monitored by UV–Vis spectroscopy, which confirmed the formation of the nanoparticles by showing peaks above 250 nm and a red shift was observed in the spectra of the nanocomposite. The structural evaluation of the nanomaterials using Fourier transform infra-red spectroscopy showed the presence of carboxylic group on their surface, indicative of their role as stabilizing agents. The X-ray crystallographic studies showed the cubic structure with estimated crystallite size of 30.42 nm for CuO–ZnO nanocomposite. The heterostructure of Synthesized CuO-ZnO NC was examined by SEM analysis. Well diffusion method was opted to inquire the antimicrobial ability of nanocomposites against different bacterial strains such as Escherichia coli (−) and Staphylococcus aureus (+). CuO-ZnO NC possessed good antimicrobial activity against the both selected strains as proved from zone of inhibitions. Furthermore, CuO-ZnO NC showed more sensitive to gram negative bacteria than gram negative bacteria.

CuO-ZnO nanocomposite, Chemical Precipitation method, XRD, SEM, Antibacterial activity.

"Chemical Mediated Synthesis of CuO -ZnO Nanocomposite and its Antibacterial Activity against Human Pathogens", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 7, page no.b594-b601, July-2022, Available :http://www.jetir.org/papers/JETIR2207170.pdf

"Chemical Mediated Synthesis of CuO -ZnO Nanocomposite and its Antibacterial Activity against Human Pathogens", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 7, page no. ppb594-b601, July-2022, Available at : http://www.jetir.org/papers/JETIR2207170.pdf