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In this study, the antimicrobial activity of titanium dioxide (TiO 2 ), zinc oxide (ZnO), and TiO 2 /ZnO nanoparticles supported into 4A zeolite (4A z) was assessed. Based on antimicrobial experiments, minimum inhibitory concentration (MIC 90 ), minimum bactericidal concentration (MBC), fractional inhibitory concentration (FIC) and disc diffusion test were determined after 24 h of contact with the prepared nanocomposites. These results are in agreements with the results of disc diffusion test. During the experiments, the numbers of viable bacterial cells of  Staphylococcus aureus ,  Pseudomonas fluorescens ,  Listeria monocytogenes  and  Escherichia coli  O 157 :H 7  decreased significantly. The crystallinity and morphology of nanoparticles were investigated by X-ray diffraction patterns (XRD), elemental mapping at the microstructural level by scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), and transmission electron microscopy (TEM). As a result, it was demonstrated that TiO 2 /ZnO nanoparticles supported in 4A zeolite could lead to an optimum activity as antimicrobial agents.

Antimicrobial activity of Titanium dioxide and Zinc oxide nanoparticles supported in 4A zeolite and evaluation the morphological characteristic