High-Efficiency Photoelectrochemical Properties by a Highly Crystalline CdS-Sensitized ZnO Nanorod Array
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- 作者：Yuyu Bu ; Zhuoyuan Chen ; Weibing Li ; Jianqiang Yu
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：June 12, 2013
- 年：2013
- 卷：5
- 期：11
- 页码：5097-5104
- 全文大小：543K
- 年卷期：v.5,no.11(June 12, 2013)
- ISSN：1944-8252
文摘
A ZnO nanorod array with comparatively long nanorods was successfully prepared on a Ti substrate by applying a hydrothermal method twice. CdS nanoparticles with high crystallinity were deposited onto the surface of ZnO nanorods through a galvanostatic electrodeposition method. CdS-sensitized ZnO nanorod arrays after being hydrothermally grown twice with the second growth time of 6 h possessed the best photoelectrochemical performance. The photoinduced current densities at a 0 V bias potential are 23.7 and 15.8 mA路cm鈥? under the illumination of simulated sunlight and visible light, respectively. The monochromatic incident photon-to-electron conversion efficiency values at the wavelength of 380鈥?20 nm are in the range of 50鈥?0%, which indicated its high photoelectric conversion efficiency. The contribution from visible light is significantly higher than that from UV light. The prepared photoanodes in the present work exhibit a potential application in photoelectrochemical hydrogen production from water reduction under sunlight.