Biosynthesis of TiO2 Nanoparticles and Evaluation of Their Antibacterial Activities | ||||
| Journal of Bioscience and Applied Research | ||||
| Volume 11, Issue 1, March 2025, Page 260-269 PDF (967.89 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jbaar.2025.419831 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Mustafa Hatem Nafea  1; Ammar Jawad Kadhim2; Khudhur Raheem Obayes3; Bilal Husam Jasim4; Ahmed Flayyih Hasan5
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| 1Department of Biomedical Engineering, University of Technology- Iraq | ||||
| 2Ibn Sina University of Medical and Pharmaceutical Sciences, Baghdad, Iraq | ||||
| 3Microbiology Department, College of Veterinary Medicine, Al-Qasim Green University, Babylon 51013, Iraq | ||||
| 4Biotechnology Branch, Departments of Applied Sciences, University of Technology - Iraq | ||||
| 5Biotechnology Research Center, Al-Nahrain University, Baghdad, Iraq. /Department of Biology, Al-Farabi University College of Baghdad, Iraq | ||||
| Abstract | ||||
| The production of TiO2 NPs using Staphylococcus aureus was simplified and made more efficient. Titanium sulfate concentration, reaction time, temperature, and pH were among the variables optimized. The ideal conditions were a titanium sulfate concentration of 0.025M, a reaction period of 30 minutes, a temperature of 60°C, and a pH of 7. Bacteria isolated from otitis media infections were shown to be susceptible to the in vitro activity of TiO2 NPs. AFM, SEM, and FTIR spectroscopy were among the tools and techniques used to characterize the produced nanoparticles. The TiO2 NPs measured 40 to 50 nm in size and had a spherical shape. Based on the results of the antibiotic susceptibility test, it was found that the bacterial isolates tested were sensitive, resistant, or moderately resistant to four different antibiotics. To test the sensitivity of several G+ and G_ bacteria to 5 different doses of TiO2 nanoparticles, 25, 50, 100, 200, and 400 μg/ml were used. These bacteria included multidrug-resistant Staphylococcus aureus, Streptococcus pneumoniae, and Klebsiella pneumoniae. The pathogenic bacteria Staphylococcus aureus and Streptococcus pneumoniae necessitated a concentration of 100 μg/ml of TiO2 nanoparticles to inhibit their growth, unlike Klebsiella pneumoniae. | ||||
| Keywords | ||||
| TiO2 · Nanoparticles · Antimicrobial · Biological synthesis | ||||
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