Influence of Fe concentration on the physicochemical properties and inactivation of Pseudomonas aeruginosa of ZnO nanoparticles

• Published in: Indian journal of physics 2021-05, Vol.95 (5), p.857-863
• Main Authors: Abdolahzadeh Ziabari, Ali, Mazloum Jalali, Kamyar, Shadan, Nima, Meraat, Rafieh
• Format: Article
• Language: English
• Subjects: Annealing; Astrophysics and Astroparticles; Deactivation; Fourier transforms; Grain size; Hexagonal phase; Infrared analysis; Infrared spectroscopy; Iron; Nanoparticles; Optical density; Original Paper; Oxidation; Photoelectrons; Physics; Physics and Astronomy; Pseudomonas aeruginosa; Scanning electron microscopy; Sol-gel processes; Spectrum analysis; Thermogravimetric analysis; Valence; Wurtzite; X ray photoelectron spectroscopy; Zinc oxide
• ISSN: 0973-1458; 0974-9845
• DOI: 10.1007/s12648-020-01751-1

Undoped and Fe-doped ZnO nanoparticles were synthesized by the sol–gel method, and the related physicochemical properties were characterized by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy (SEM). Annealing of the nanoparticles at 400 and 500 °C was studied. The prepared nanoparticles showed the hexagonal phase of wurtzite structure, and the grain size was in the range of 30–47 nm. Fe ions were in oxidation state of + 3 as was revealed by XPS analysis of the 0.7 at% Fe-doped powder. The photocatalytic properties of ZnO:Fe nanoparticles were investigated by inactivation of Pseudomonas aeruginosa under UV–B lamp irradiation. Optical density, colony counting method and SEM were used to survey the antibacterial activity of the nanoparticles. After analyzing the results, it was found that the prepared nanoparticles have a very effective antimicrobial activity against P. aeruginosa . This activity increases by increasing/decreasing the amount of Fe in the compound/annealing temperature. Heavily doped ZnO nanoparticles showed a considerable antibacterial effect against P. aeruginosa .