| Nanometer TiO2 photocatalisis is regarded to have the unique quality such as safety and energy saving ect and the catalyzer quality make it can be applied in organic pollutant degradation , thus, at present , nanometer TiO2 has become one of the most extensive application materials.At present, the research of nanometer titanium dioxide is chiefly concentrated on the nanometer powder and film as well as photocatalitic application, but since the nanometer powder is not suitable to be reclaimed and segregated, and the capability of repeated uses of the film is not good, and these cause that it is far away from the application in large-scale at the moment. The aim of this thesis is to fabricate nanostructured TiO2 on SiO2 carrier by the the combination of sol - gel technology and layer by layer self-assembly method, and the synthesis methods and the relationship of component - structure - capability were systematically studied, and the cost of the products was to be cut down and the excellent capability was to be obtained by of the utilization of simple instrument and processes. The major work includes the following several aspects:1. Sol-gel technology and self-assembly technique were utilized,and Ti (OC49)4 was the raw material, and anhydrous ethyl alcohol was the solvent, 12 alkyl sodium sulphate (C12H24SO4Na) aqueous solution served as organic self-assembly monolayers, and different layer numbers and different content of nanometer titanium dioxide had been successfully assemblied on the silica beads surface whose diameter is 0.5-1.0mm.The catalysis capability of nanostructured TiO2 had been studied by the way of using SO427Ti(VSiO2 solid super strong acid as the catalyzer in the reaction of ethanoic acid and butanol .The results show that : The structure of nanostructured TiO2 is fine and densified and the capability of repeated use is good .2. Sol-gel technology and self-assembly technique were utilized,and low-priced TiCl4 was the raw material, and anhydrous ethyl alcohol was the solvent, and 12 alkyl sodium sulphate (C12H24SO4Na) aqueous solution served as organic self-assembly monolayers,and different layer numbers and different content of nanometer titanium dioxide had been successfully assemblied on the silica beads surface whose diameter is 0.5-1.0mm. The influence of the content of water and TiCl4 (namely,the content of ethyl alcohol) and reaction conditions ( ultrasound and magnetic stiring )on the content of titanium dioxide in the sample had been studied .3. Sol-gel technology and self-assembly technique were utilized,and low-priced TiCl4 was the raw material , and the hydrochloric acid was the solvent , and 12 alkyl sodium sulphate (C12H24SO4Na) aqueous solutionserved as organic self-assembly monolayers, and also different layer numbers and different content of nanometer titanium dioxide had been successfully assemblied on the silica beads surface whose diameter is 0.5-1.0mm . Therelation between layer numbers and the content of nanometer titanium dioxide had been studied by using titration method. And the influence of concentration of hydrochloric acid on the content of titanium dioxide in the sample had been studied.4. All the above samples had been characterized by XRD, SEM and X-ray energy spectrum , IR and titration method etc, the research results show: (1)The crystal form of nanometer titanium dioxide were influenced by raw material, reaction conditions and calcinations temperature,etc.(2)The titanium dioxide of carrier surface is the spherical, and the diametre is 30-60nm, and structure is fine and densified. (3)Along with the increase of the numbers of the layers, the content of titanium dioxide increases in basical line. (4) Along with the increase of the numbers of the layers, the surface of the carrier is even fine ,densified and continuous, and the diametre of titanium dioxide reduces.5. Photocatalitic activity of nanostructured titanium dioxide had been studied by degradating the solution of phenol at the different conditions. The results show: The phot...
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