Preparation And Photoeatalytic Acitiviy Study Of Nanocrystalline TiO₂ Thin Film

This paper use the traditional sol-gel method, and an improved sol-gel legal system of the nano- TiO2 sol. The principle of experiment, the experimental process, and the selection of raw material factors such as experimental parameters is discussed, the emphasis is on the experimental parameters of research. With tetra butyl titanate ester of titanium source, hydrogen peroxide solution for complexing agent by sol-gel precipitation solution glue al.chemical strategies for nano- TiO2 sol, including water and tetra butyl titanate ester of mole ratio for bid, Hydrogen peroxide and tetra butyl titanate ester of mole ratio for generations, The reaction temperature control in 20℃around can. In the reaction process should pay attention to safety, because this reaction for exothermic reaction, Using the traditional sol-gel method, tetra butyl titanate ester of titanium source, anhydrous ethanol solvent glacial acetic acid or applying triethanolamine as complexing agent and became nano-TiO2 sol, one better condition of experiment is to adopt the drops of water, add way to join and water with ethanol and pH regulator with mixed solution, Water and tetra butyl titanate ester the molar ratio of take six to seven, Ethanol and tetra butyl titanate ester the molar ratio of take 27～28; PH control in 3～4 or 8～9, Hydrolysis of temperature control in 20℃-30℃;Four chlorinated titanium, anhydrous alcohol, polyethylene glycol (600), inhydrolysis sol-gel process), its nano- TiO2 sol better experiment condition is anhydrous alcohol and four chlorinated titanium mole ratio for now, Mpeg and four chlorinated titanium the molar ratio of 0.1:1; The reaction temperature control in 0℃around.This paper adopts rotating tiras method with glass slides for preparation of nanometer TiO2 thin film substrate, according to the experimental got in the best of conditions of colloidal experiments best coating times, calcining temperature, calcining time, and analyses the XRD is determined.This thesis another experiment aim is to give the titanium dioxide photocatalytic degradation of organic pollutants sewage to provide the reference. By methylene blue, Rhodamine B, bisphenol A,4-chlorophenol simulated industrial wastewater. In experiments investigated numerous experimental factors influence of optical catalytic degradation. In trials found TiO2 thin film catalyst addition amount, degradation of liquid initial concentration, degradation of liquid pH and the time of light, light intensity, degradation factors such as temperature of nanometer TiO2 thin film photocatalytic degradation ability influence. And the best degradation under the condition of the solution after degradation the chemical oxygen consumption (COD) was measured.