Cu doping into TiO₂ nanoparticles via liquid phase deposition and their photocatalytic application

Abstract

Titanium dioxide (TiO₂) photocatalyst is one of the semiconductors that shows the effect of water/air purification, deodrant, or antibacterial/sterilization by UV light irradiation. For visible light sensitivity, we synthesized Cu-doped TiO₂ nanoparticles via liquid phase deposition method, which is known as an approach with low energy and low impact to environment. The products were carefully characterized and applied for photocatalysis. The obtained nanoparticles are found to be TiO₂ with anatase phase, while those with Cu-doping showed visible light absorption. The light absorption edge is confirmed to shift to 550 nm after optimizing the concentration of Cu.