碩士 / 國立東華大學 / 光電工程學系 / 107 / Cu2O nanowires were prepared by means of a simple, cost-effective and low-pollution method for the application of photoelectrochemical hydrogen generation. By changing the temperature parameters form 25 oC to 4 oC for the synthesis Cu(OH)2 nanowires (subsequently convert Cu(OH)2 to Cu2O at 550 oC in N2 environmental condition), the crystal structure of the Cu2O nanowires are improved, and the photoelectrochemical characteristics of the Cu2O nanowires are optimized. The photocurrent density of the Cu2O sample is raised from 1.8 to 2.2 mA/cm2 at -0.6 V.
In order to further improve the efficiency of photoelectrochemical hydrogen generation of Cu2O nanowires, ZnO nanoparticles were synthesized on the surface of Cu2O nanowires structure by immersion method to form a PN structure. Then TiO2 and Pt nanoparticles were deposited on the surface of Cu2O/ZnO to improve the photon-to-electron conversion efficiency of Cu2O and reduce its over-potential. The Cu2O/ZnO/TiO2/Pt nanowire electrodes were successfully synthesized in a simple route and applied to the photoelectrochemical hydrogen generation. The highest photocurrent density is 8.2 mA/cm2 at -0.6 V.
The results of this study all prove that Cu2O is a promising photoelectrochemical material, which can perform well in the field of photoelectrochemical hydrogen generation.
| Identifer | oai:union.ndltd.org:TW/107NDHU5614004 |
| Date | January 2019 |
| Creators | Hsuan-Yu Yeh, 葉宣佑 |
| Contributors | Yu-Kuei Hsu, 徐裕奎 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 56 |
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