Preparation and identification of nanoparticle of lanthanum oxide and its application as antibacterial agent

In this research, nanoparticle of lanthanum oxide (a) has been synthesized in a coprecipitation method and its ability to be antibacterial has been studied. The La2O3 crystalline nanoparticle (a) was prepared at a nominal temperature of 673 K for 4 hours. The samples were identified using FTIR, XRD, VSM, SEM, and EDX methods. Using the infrared spectroscope (FTIR), the covalent bonding of La2O3 in the sample is confirmed. Xray diffraction (XRD) shows that the singlephase sample has a hexagonal structure with average particle size 69 nm. Moreover, the size of the particles seen in the SEM images corresponds to each other. Using the Vibration Sample Magnetometer (VSM), the magnetic properties of the nanoparticle (a) were studied and the result shows that the nanoparticle has paramagnetic behavior. The antibacterial effects were also examined in vitro against standard bacterial strains, the Grampositive Staphylococcus aureus; S. aureus ATCC 25923 and Enterococcus faecalis; Enter faeca ATCC 29212, and also the Gramnegative Escherichia coli; E. coli ATCC 25922 and Pseudomonas aeruginosa; P. aeruginosa ATCC 27853. Using these strains, the minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and inhibition zones (IZ) were obtained. Antibacterial activities of lanthanum oxide nanoparticle are more than agents lanthanum salts.