碩士 / 國立臺灣科技大學 / 化學工程系 / 103 / CuO is one of the possible materials of photo-electrochemical cell (PEC). It can be used for splitting water and generation of hydrogen via absorbing light. In this study, I analyzed ingredients of the waste water and removed the impurities, expecting that it can be a possible raw material source of converting CuO nano-particles by solution-based method. I also adjusted the parameters of process and discuss the PEC performance of electrode made from the waste water.
The experiment data shows that the molar ratio of adding ammonium to CuSO4 in the waste water should be 450 to 1 at least. This study found that the surface of electrode made from the waste water could be covered with some Na2SO4 crystal and lower the current density. To remove that, the powder should be washed sufficiently. For powders prepared at 55 oC and sintered at 500 oC for 1 hour, the bandgaps for these electrodes were estimated to be about 1.87 eV, and the porous structure of the nanosized CuO films increased surface area and thus led to a high photocurrent, i.e. 1.05 mA/cm2. These films demonstrated 0.38% solar conversion efficiency at an applied voltage of -0.55 V vs. saturated Ag/AgCl in 1 M NaOH electrolyte with 1 sun (AM1.5G) illumination. The charge carrier density was estimated to be 6.28x1019 cm-3. This relatively high charge carrier density may be due to the high surface area and short transport distance to the electrode/electrolyte interface in the porous nanostructure.
| Identifer | oai:union.ndltd.org:TW/103NTUS5342121 |
| Date | January 2015 |
| Creators | Yu-Lun Chien, 簡育綸 |
| Contributors | Chia-Ying Chiang, 江佳穎 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 99 |
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