碩士 / 國立中興大學 / 化學工程學系所 / 105 / The use of photon energy for water splitting is a clean and non- pollute hydrogen-producing path. At present, the photocatalyst material of the photon energy for water splitting to producing hydrogen have great development. Photocatalyst received the light source than give energy to produce a photocatalytic reaction, then using this photocatalytic reaction for water splitting to produce hydrogen.While titanium dioxide has good chemical stability、Non-toxic and low cost of preparation, so the choice of titanium dioxide of photocatalyst used in photocatalytic hydrogen production as my discussion purpose。
In this study, we use commercially titanium dioxide nanoparticles (Degussa P25) were hydrothermally treated with NaOH solution followed by acid pickling with HCl. Finally, we usehigh temperature to calcination, and successfully prepare the titanium dioxide nanotubes。In the preparation using different process parameters, sodium hydroxide concentration of 5M, 7.5M, 10M, 12.5M；hydrothermal temperature 110℃、130℃、150℃、170℃, it is expected that pure titanium dioxide nanotubes can be obtained with the highest yield of hydrogen。
In order to improve the hydrogen production efficiency of titanium dioxide nanotubes, adding the metal copper ions into the titanium dioxide carrier by supporting the initial wet impregnation to copper oxide on the titania nanotubes, The added amount were 1 wt%, 3 wt%, 5 wt%, 10 wt%, we can presumed that the metal can effectively reduce the recombination of the electron-hole pairs, greatly enhance the efficiency of hydrogen production.
Finally, the surface morphology, structure and properties of photocatalyst were analyzed by SEM, TEM, XRD, FT-IR, UV-DRS, ICP-MS and BET .
From the final experimental results, compare with hydrogen accumulated in 4hr, can be known that pure titanium dioxide nanotube photocatalyst in the sodium hydroxide concentration of 5M, the preparation conditions of hydrothermal temperature 130 ℃. With its optimal hydrogen production of 2322μmol / g.．hrs, the most appropriate amount of copper oxide is 3 wt%, and the amount of hydrogen production can be as high as 47082μmol / g．hrs.
| Identifer | oai:union.ndltd.org:TW/105NCHU5063016 |
| Date | January 2017 |
| Creators | Kuan-Chung Chen, 陳冠中 |
| Contributors | Jih Mirn Jehng, 鄭紀民 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 73 |
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