Characterization and Preparation of Pure and silver- doped TiO2 particles by RF Magnetron sputtering for Gas sensing and Antibacterial activity

mustafa55 hashim; Abdulhussain A.

doi:10.71229/cx8cbe45

Authors

Mustafa H.hashim Physics Department, College of Education/University Al-Qadisiyah ,Iraq
Abdulhussain A. khadayeir Physics Department, College of Education/University Al-Qadisiyah ,Iraq

DOI:

https://doi.org/10.71229/cx8cbe45

Keywords:

TiO2 nanoparticles , Ag doping , RF Magnetron Sputtering , Gas Sensing , Klebsiella pneumoniae

Abstract

In this study, pure titanium oxide (TiO₂) nanoparticles and silver-doped (TiO₂:Ag) nanoparticles were produced by radio-frequency magnetic spraying. X-ray diffraction (XRD) studies verified the formation of an anatase phase with metallic silver atoms without changing the base structure, and field-emission scanning electron microscopy (FE-SEM) demonstrated that the nanoparticles aggregated into porous architectures. The optical absorption is enhanced, and the energy gap is lowered from (3.0 to 2.5) eV by the doping of silver. The TiO₂:Ag sample had the maximum sensitivity (14.6%) in sensing applications at low temperature (200°C), compared to the pure TiO₂ sample, which needed 300°C for its highest sensitivity (21.6%). It signifies higher operating efficiency at reduced energy usage. The antibacterial activity of TiO₂:Ag sample against Klebsiella pneumoniae was much greater than that of pure TiO₂ due to the synergistic action of Ag and TiO₂ in enhancing the generation of reactive oxygen species. The flexible TiO₂:Ag nanomaterial may therefore represent an attractive candidate for the development of low-temperature, efficient gas-sensing technologies as well as antimicrobial medical devices.

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