A comparative study on the antibacterial activities of TiO2-Ag nanocomposites with the different molar percentages of Ag

TiO2- Ag nanocomposites with three different percentages (molar percentage) of Ag (5 mol%, 8 mol%, and 15 mol%) have been synthesized by mechanical alloying of TiO2 and Ag powders for 3 h. The bactericidal activities of these three different nanocomposites have been compared by using an agar cup assay against both Gram-positive and Gram-negative bacteria. The antibacterial study confirmed that the nanocompos-ite with 15 mol% Ag has the best antibacterial activity against both types of bacteria (Gram-negative and Gram-positive bacteria). This nanocomposite with the best antibacterial activity has been characterized by analyzing X-ray diffraction (XRD) patterns, FESEM images, and EDS spectrum. This novel strategy pro -poses a new route to synthesizing a novel antibacterial agent with minimal side effects in a simple, cost-effective, and facile method. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Condensed Matter Phy-sics.

Automated summary

TiO2-Ag nanocomposites with different percentages of Ag (5 mol%, 8 mol%, and 15 mol%) were synthesized via mechanical alloying, and their bactericidal activities were evaluated against Gram-positive and Gram-negative bacteria using an agar cup assay. The nanocomposite with 15 mol% Ag exhibited the highest antibacterial activity against both types of bacteria. Characterization of this nanocomposite was performed using XRD, FESEM, and EDS, confirming its structure and composition.