碩士 / 大同大學 / 材料工程學系(所) / 103 / Phtocatalysis of titanium dioxide has been widely investigated due to its potential application in degradation of pollutant and production of hydrogen. In this study, diatom was used as a support of titanium oxide to investigate the photocatalytic effect of diatom/ TiO2 composite powder.
After cleaning with sulfuric acid, two diatom/ TiO2 composite powders were fabricated for comparison. (1) Diatom was infiltrated with titanium isopropoxide solution to form diatom/TiO2 composite powder after heat treatment. (2) Diatom was also with mixed with commercial TiO2 powder to form diatom/P powders. Crystal structure was identified with XRD. The photocatalytic activity was evaluated by the degradation of methylene blue under UV light. The results showed that diatom is a strong absorbent for methylene blue. Composite catalyst powder would absorb first and then photocatalytic in methylene blue solution. It was found that diatom effectively improved the photodegradation efficiency of TiO2 made from titanium isoporpoxide. However, there was no sign of improvement for commercial P powder.
| Identifer | oai:union.ndltd.org:TW/103TTU05159024 |
| Date | January 2015 |
| Creators | Hsin-hui Lin, 林欣慧 |
| Contributors | Yung-jen Lin, 林永仁 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 87 |
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