<p> Photocatalytic TiO2 coated paper was prepared as antibacterial paper to investigate bactericidal activity of TiO2 in the presence of UV light. When TiO2 exposed to UV light, it produced hydroxyl radicals which were strong oxidative groups and could damage the cell wall causing death of bacteria. The goal of this work was to develop a promising method for microbiological examination of antibacterial paper and to test the disinfection properties of photocatalytic TiO2 coated paper after UV illumination.</p> <p> Three different methods were modified to test antibacterial effect of TiO2 coated paper. The disk diffusion method, the washing method, and the membrane filter method. It was found that disk diffusion technique would not work because of insolubility of TiO2 in water but it could be used for any other antibacterial paper that consisted water soluble agent. The results from membrane filter method agreed with those of washing method showing the reduction of E.coli colonies for TiO2 coated paper after exposure to UV, comparing to blank paper.</p> <p> With use of washing method, it was shown that by changing some functions such as: increasing TiO2 content on the paper, increasing UV irradiation time or UV intensity, survival ratio of the bacteria decreased.</p> / Thesis / Master of Applied Science (MASc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/22581 |
| Date | 08 1900 |
| Creators | Zoghi, Parisa |
| Contributors | Pelton, Robert H., Chemical Engineering |
| Source Sets | McMaster University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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