Simple Preparation of Anatase TiO2 Nanoparticles via Pulsed Laser Ablation in Liquid

摘要

The physical and chemical properties of TiO2 have been of great interest due to the potential application in photo-catalytic, photovoltaic, lithium-ion battery and dye-sensitized solar cell systems. Especially, its characteristic properties in optical and electronic properties, nontoxicity, chemical inertness, and high melting temperatures have drawn extensive research on the ability of semiconductor photocatalyst to promote the photodegradation of various pollutants. Anatase, brookite, and rutile are the major crystalline structures of TiO2, of which rutile phase is most stable; whereas anatase and brookite phases are metastable and easily transformed to rutile phase when heated above about 600-800 °C. As demonstrated in other experimental studies, the anatase form of TiO2 has shown much higher photoactivity than that of rutile.