Study On The Photic Function Of Nano-TiO₂

Firstly,Nano TiO₂ colloids were successively prepared by focused,pulsed laser ablation(PLA).The TEM,UV-Vis and fluorescence spectroscopy were used to study on the effect of factors as the flowing rates of the flowing liquid,the pulsed laser output power,the age of the colloids,on the luminescence of the nano TiO₂ colloids.Secondly, PLA was used to prepare a series of new-type TiO₂ nano-ethanol colloids doped with different metal oxides,the UV-Vis,XRD and fluorescence spectroscopy were used to study on the effect of factors as different metal oxides,the dopant content,different doping methods,on the fluorescence properties of the nano TiO₂ ethanol colloids.Thirdly, PLA was used to prepare two kinds of metal oxides mixing organic colloids doped nano TiO₂,the effects of the dopant of nano TiO₂ colloids on the luminescence of nano Eu₂O₃,ZnO,Tb₂O₃,Al₂O₃ rganic colloids were studied by the method of the UV-Vis and fluorescence spectroscopy.Finally,PLA was used to prepare nano TiO₂/PS colloids,then the colloids were made to thin films,the characteristic of the films were studied by the method of TEM,FT-IR and XRD.The method of UV-Vis enveloping was used to calculate the refractive index of the films,the relationship between the refractive index and the thickness,wavelength and the dopant of different crystal types.PLA was used to explore a new way to prepare nano TiO₂ colloids with strong fluorescence emission and nano TiO₂/PS films of high refractive index.