Antibacterial activity of new magnetic Ag/TiO2 nanocomposite in silane sol–gel matrix

Abstract

Because of the silver nanoparticles have abundant application especially for some advanced science such as, medical, pharmacy, industry and etc; the enhancement of antibacterial activity and reusability of these nanoparticles is vital. To achieve this goal, a new three-component and magnetically receptive NiFe₂O₄@TEOS–TPS@Ag/TiO₂ nanocomposite has been designed and synthesized. The as-synthesized nanocomposites has been characterized by fourier transform infrared spectroscopy, field emission scanning of electron microscopy, transmission electron microscopy, X-ray diffraction and vibrating sample magnetometer; and also, their shape, size and magnetic properties evaluated. The antibacterial activity of new nanocomposite was investigated by using the disk diffusion procedure, and measuring of the minimum inhibitory concentration and minimum bactericidal concentration quantities. The produced nanocomposite indicated noble recyclability and a strong antibacterial activity against some Gram-positive and Gram-negative bacteria. Also, this nanocomposite can be easily removed by applying an external magnetic field to the media following water treatment.

https://link.springer.com/article/10.1007/s10854-017-7049-5