Abstract: Ultraviolet (UV)-induced nanoparticle colloidal jet processing can realize the processing of sub-nanometer ultra-smooth surface of hard and brittle crystal materials. It can be known according to the material removal principle that along with the polishing process, the surface of TiO₂ nanoparticles in the colloid would absorb a layer of removed atoms of the workpiece, so that the activity and photocatalytic properties of the TiO₂ nanoparticle colloid would be affected. In order to achieve the recycling of TiO₂ nanoparticle colloids, the O₃/UV advanced oxidation process(AOPs) was based to study the reactivation mechanism of the TiO₂ nanoparticles colloids and meantime, the TiO₂ nanoparticle colloidal activation system was designed as incorporated with the UV-induced nanoparticle colloidal jet processing system. Finally, the structure of reactivation reaction chamber in the system was fluid-dynamically simulated. The simulation result showed that the structural design would meet the activation requirements of TiO₂ nanoparticle colloid.

Key words: TiO₂ nanoparticles, colloid, advanced oxidation process(AOPs), activation, fluid dynamics simulation