Based On Titanium Dioxide Complexes Of Titanium Based Nanomaterials Synthesis And Its Application

Nanostructures have been becoming an active research field because of their unique properties different from bulk materials, Nano manufacturing plays a key role in the transformation of scientific results into industrial techniques, and the ultimately aim of nanotechnology is the manufacturing of the specialized functional materials using the physical and chemical properties of the materials arising from the nano effect. It is of especially significance that the reasonable control of the size and morphology of nanostructures and the controllable synthesis of the nanostructures with particular shape and dimension. In our work, peroxo-titanium complex (PTC) is used to synthesize titanium-based nanostructures with various shapes and structures, and their properties are also investigated. The main works are listed as follows:1. The peroxo group is the key point of the stable existence of PTC in aqueous solution, and nano titanium dioxide particles can be synthesized as the peroxo group is broken. Firstly, we offer a low temperature crystallized synthesis technology of titanium dioxide sol originated from ilmenite; Secondly, sized controlled mono-dispersed titanium dioxide spheres are prepared in an aqueous solution procedure. Compared with the generally used metal-organic precursors, great advantages are taken as PTC is adapted from the points of environment and cost.2. PTC precursors can be easily used to perform coating based on static force as it is charged in aqueous solution. Furthermore, a relatively low crystalline temperature of anatase titania can be obtained using PTC precursors, and this will benefit much to the temperature sensitive core materials. Firstly, anatase-crystalline titania hollow spheres are obtained with peroxo-titanium complex (PTC) as precursor instead of organometal in an aqueous solution. Compared with the traditional template method, the surface coating, removal of the core-material and the crystallization of the titania shell are finished simultaneously instead of a separate calcination process. Secondly, a procedure of preparing TiO₂/Fe₃O₄ core/shell structure is developed, and its application on DNA separation and detect is investigated. 3. A modification and doping of titanium dioxide is performed based on the aqueous solution of PTC. Firstly, a TiO₂/SiO₂ composite sol is synthesized, and its UV light induced catalyst activity is characterized by the degradation of methyl blue. Secondly, based on the hydrolysis and condensation of PTC and tetraethoxysilane (TEOS), titanosilicate nano spheres are prepared and characterized. Finally, a new way to synthesize Au doped TiO₂ sol is developed and its Visual light induced catalyst activity is characterized by the degradation of methyl blue.4. An air cleaner of titanium dioxide is designed, its purification of formaldehyde in a room is simulated, and formaldehyde can be effectively removed in wide range of temperature (0-40℃) and humidity (20-50%). The functional textile is manufactured by loading TiO₂. A self-clean and anti bacterium effect are obtained by the prepared functional textile, and its ability of the removing of formaldehyde in air is supported by the further experiment.