In the current study, a facile and eco-friendly method has been developed for the synthesis of titanium dioxide nanoparticles from titanium isopropoxide solution using Datura metel (Vellai Umathai) leaves and orange peel extract. Silver nanoparticles (60 nm) and silver nanoplates (130 nm) have been synthesized and characterized using UV-visible spectroscopy, X-ray diffractometer (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The silver nanoparticles are doped with TiO₂ nanoparticles. The photocatalytic activity of Ag nanoparticles and nanoplates doped TiO₂ nanoparticles coated on vitrified tiles was investigated, wherein, degradation of methylene blue, rapidly on exposure to sunlight was observed. Analysis of the antimicrobial activity measured using colony forming units showed a 4-log reduction in the growth of the Gram-negative bacteria and a 5-log reduction in the growth of the Gram-positive bacteria.

Keywords: Titanium Dioxide; Nanoplates; Photocatalytic Activity;