Antibacterial and photocatalytic activity of anatase phase Ag‐doped TiO ₂ nanoparticles

Abstract

A simple and new solid-state molten-salt method to synthesise silver (Ag)-doped titanium dioxide (TiO 2) nanoparticles for solar light-induced photocatalytic applications is examined. Ag-doped TiO 2 nanoparticles with varied Ag content ranging from 3 to 10% were synthesised by a single-step molten-salt synthesis method. The effect of Ag content on the antibacterial and photocatalytic activity of nanoparticles was tested. The prepared nanoparticles were studied by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry, ultraviolet-visible (UV-vis) diffusive reflectance spectrometer (UV-vis DRS) and powder X-ray diffraction. The SEM image of nanoparticles clearly showed the presence of agglomerated spherical particles. The EDX analysis of the particles confirmed successful doping of particles in the presence of the Ag in the particles. The doping of Ag in TiO 2 produced TiO 2 pure anatase phase. According to UV-vis DRS results, increasing Ag-doped content in the Ag-doped TiO 2 resulted in a higher visible absorption capability of the materials. Ag doping also improved the antibacterial and photocatalytic activity of TiO 2 nanoparticles. The maximum photocatalytic activity under light irradiation was observed for 5% Ag-doped TiO 2 .

Reduction of Water Evaporation from Dam Reservoirs Using Hydrophobic Silver‐Doped Titanium Dioxide Nanoparticles Coating

“…Thus, TiO 2 , ZrO 2 , Fe 2 O 3 and Ni/Fe nanoparticles have the potential to reduce the base rate of fluid evaporation rate while clay nanoparticle can increase the evaporation rate. On the other hand, silver‐doped TiO 2 nanoparticles have photocatalytic and antibacterial activity when exposed to visible light or sunlight irradiation (Ghorbanpour & Feizi, 2020; Madadi et al., 2018). Therefore, using the silver‐doped TiO 2 nanoparticles can be a good option to reduce water evaporation.…”