The Preparation And Characterization Of TiO₂ Thin Films And Porous TiO₂ Thin Films By Sol-Gel Method

Since the discovering of the photocatalysis of TiO₂, it has been being researched in the photocatalyst field for good stable photocatalytic activity. TiO₂ has attractive much attention of researchers world wide for its characteristics of good chemical stability, wear property, light resistance, low cost and nontoxic. And so TiO₂ have been widely used for photolysising water, sterilization, sensitized solar alls, etc.However, there still are some problem existing when TiO₂ is used in industry. The ability of photocatalysis especially need to improve.Using[Ti(OC₄H₉)₄], HCL and H2O as raw materials, TiO₂ transparent thin films were prepared on glass substrate by sol-gel method. And a series of TiO₂ porous thin films with the different content of polyethylene glycol(PEG)are prepared by sol-gel methord. And the thin films were characterized by XRD, AFM and UV-VIS spectra.It proves from the experiment that the best volume ratio is 3:1:10:8 of Ti(OC₄H₉)₄:HCL:H₂O:EtOH. Our experiment has fabricated TiO₂ thin films succefully and the decoloration rate are 12.71% and 21.49% respectively,which C₂₈H₃₁ClN₂O₃ has catalyzed about 300min and 600min. In other words, the decoloration rate about C₂₈H₃₁ClN₂O₃ is increasing with the irradiated time of ultraviolet radiation is increased. But the photocatalysis capability of porous TiO₂ thin films, which PEG is 0.75 g in sol of 25mL, is higher than anything else. Its ratio of decolor has reached to 45.47% in 300 min and the other ratio of decolor , which is about TiO₂ thin films,is only 12.71% because it bring on the best absorbity and improve filmy photocatalysis capability that porous TiO₂ thin films has the measurable dimension of aperture or the surface area.