| Summary: | 碩士 === 國立臺北科技大學 === 材料及資源工程系碩士班 === 93 === The investigation includes three major parts: The first part is preparation of nano TiO2 by sol-gel method and grinding method. The result of experiment are discovered :
For the sol-gel method , H2O2 decomposing Ti(OH)4 can get the smaller particle size and the better photo-catalytic effect .The best condition of hydro-bath is in 85 ℃ and placed 8.5 hours in hydro-bath tank which can get 9.8 nm with average particle size.
For grinding method, the amount of grinding bead is approximately 70% (2,520g) in the grinding volume of the chamber. The better solid content of slurry is 30 wt％ ,moreover, the second grinding can achieve a better dispersed result.
The second part is investigation for dispersing and adhering technology of nano TiO2 .The result of our experiments show that the best dispersant dosage is 1.06wt%(821A) for wet grinding and get the better dispersed result.
In adhering technology, for 1％ NaSiO2 (water glass) can get better combination with glass lenses. As the temperature increase, the hardness of TiO2 coating surface increases.
The third part is focused on the application of TiO2 : The photo-catalytic effect of nano TiO2 is able to be applied on plastics ,ceramic frits, and the other weave territory. The results of experiment discovered：
(a) We doped nano TiO2 in plastic containers so that the expiration date of food will be extended, moreover, increase the ability of anti mold.
(b)We glazed ceramic by glass frit and doped nano TiO2 can increase photo catalytic effect. The major sintering temperature is 570℃, therefore, the phase alteration of TiO2 is avoided. In addition, the higher photo-catalytic effect and better ability of anti-bacteria are existed in our ceramic products.
(c) After the textile soaked in sol-gel synthesized nano TiO2 , we take it to a 100 degree.
thermal process. We found that sol-gel synthesized TiO2 spent shorter time to decompose methyl blue than grinded TiO2.Moreover, the synthesized TiO2 possess higher ability of adhesion.
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