Study On The Controlled Synthesis And Properties Of TiO₂ And Its Composite With Ordered Mesostructures

Mesoporous materials which belong to the category of nanomaterials have opened some interesting applications in the field of catalysis, separation, ion-exchange, and others due to their unique structural character. However, the conventional mesoporous materials possess small mesopore diameter (<7 run), which limit their potential applications for catalysis, sorption and separation of large molecules. In order to extend the utility of mesoporous materials, it is essential to be able to synthesize large-pore (>7 ran) mesoporous materials.The current dissertation concerns study on the controlled synthesis and properties of TiO₂ and its composite with ordered mesostructures. Large-pore meso-nc-TiO2 has been successfully designed and synthesized in our laboratory. Furthermore, the mesopore size can be easily controlled through adjusting the synthetic parameters. In this dissertation, on the basis of the synthetic strategy for the preparation of large-pore meso-nc-TiO₂ with 14 nm mesopore diameter, we also design and synthesize a series of mesoporous TiO₂-ZrO₂ composites using one-step synthesis strategy through introducing different amount of zirconia source. The photocatalytic activity and hydrophilicity of our obtained meso-nc-TiO₂ and mesoporous TiO₂-ZrO₂ composites were investigated in this thesis. The formation mechanism, photocatalysis mechanism and hydrophilicity mechanism of meso-nc-TiO₂ and mesoporous TiO₂-ZrO₂ composites were also presented in this dissertation.A novel and facile synthesis strategy was demonstrated for the design and synthesis of large-pore meso-nc-TiO₂ thin films using butanol released in situ as the cosurfactant and triblock copolymer P123 as the template in the non-aqueous...