光催化裂解水製氫奈米太陽能電池之光電極製作與影響效率分析

本論文主要是進行光催化裂解水製氫奈米太陽能電池之光電極製作、電解液調配與製氫效率分析，光觸媒材料以ZnO、TiO2為主，載體使用ITO玻璃與網狀金屬進行塗佈，在使用ITO玻璃為載體的製作部份，將ZnO、TiO2以自行架設的自動噴霧裝置進行不同層數的噴霧塗佈，部份光電極並添加碳黑，再組成太陽能電池以量測I-V曲線及製氫效率；以網狀金屬為載體部份則將TiO2粉末進行噴霧塗佈、浸泡吸附、電泳吸附等，組成好的太陽能電池一樣進行I-V曲線量測，並觀察是否有氣泡產生。為此，本研究並自製氫氣收集裝置，結果顯示，純TiO2較純ZnO有較好的光電特性，碳黑的添加能有效改善I-V值，另外，不同的奈米粉未堆疊方式對所製作的太陽能電池之裂解水最小電壓有很大的影響，本研究以ITO玻璃為載體及ZnO為基底噴塗20層TiO2有最小裂解水電壓0.37V；以網狀金屬為載體則以Ti網得到最佳的I-V 曲線但卻無氫氣產生。另外，在電解液中添加I能有效的增加電流與電壓。本論文以ITO玻璃為載體及ZnO為基底噴塗20層TiO2為光電極，反電極為碳片，電解液為NaOH添加I進行製氫效率量測，得到製氫效率每分鐘0.67%。

關鍵字

光電極； ZnO ； TiO2 ；噴霧塗佈

並列摘要

This paper mainly studies fabricati, TiO2 on photoelectrode, production of electrolyte, and efficiency analysis of hydrogen generation for the nano solar cells with photoelectrochemical generation of hydrogen. The applied materials of photocatalyst are ZnO and TiO2 which are coated on ITO glass and metal net. Coating on the ITO glass used the home-made automatic spray apparatus for different number of layers coating with ZnO and TiO2. Some photoelectrodes were added with carbon black. The finished solar cells were further measured their I-V curves and efficiency of hydrogen generation. Coating on the metal net used spray, immersion, and electrophoresis methods. The finished solar cells were also measured the I-V curves and observed the hydrogen generation. For observation of hydrogen generation, this work built a hydrogen collector. The results show that applying the pure TiO2 as material of photoelectrode has better photoelectric property than pure ZnO and adding carbon black in photoelectrode has improved the I-V curve. Moreover, multiple layers coating with different nano powder has clearly influenced the minimum voltage of decomposed water. Coating on ITO glass with ZnO base and 20 layers of TiO2 received 0.37V of the minimum voltage of decomposed water. Coating on Ti net had the best I-V curve, but it didn't appear hydrogen. Furthermore, adding I in electrolyte had increased current and voltage. This paper coated ZnO base and 20 layers of TiO2 on ITO glass to build photoelectrode, carbon sheet as counter electrode, adding I in NaOH solution of prepare electrolyte for measurement of hydrogen generation efficiency. The reached hydrogen generation efficiency is 0.67% per minute.

並列關鍵字

Photoelectrode ； ZnO ； TiO2 ； Spray coating

參考文獻

[1] Energy Information Administration, "International Energy Outlook 2007," Washington: U. S. Department of Energy, 2007, pp. 29-58.

[2] A. Züttel, "Hydrogen storage methods and materials," Naturwissenschaften, 2004, pp. 157-172.

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光催化裂解水製氫奈米太陽能電池之光電極製作與影響效率分析

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