Synthesis of metallic titanium nanoparticles with a combination of ultrasonication and flowing of electric current

The present work involves a method for synthesizing metallic Ti nanoparticles in the liquid phase. A deep eutectic solvent (DES) composed of ethylene glycol and choline chloride was used as the solvent for electrolytic dissolution. A nanoparticle colloid solution was prepared from a titanium chloride/DES solution by a flowing electric current, where metallic Ti plates were used as the anode and cathode under ultrasonic irradiation in water at room temperature. The nanoparticulate powder had the crystal structure of hexagonal Ti. The nanoparticle sizes were in the range 4.0–114.0 nm and the metallic Ti nanoparticles were chemically stable in ambient atmosphere. Chemically stable metallic Ti nanoparticles are expected to be applied in fields such as aeronautics, solar cells, molding, etc.