Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
ACS Appl Mater Interfaces. 2013 Jun 12;5(11):5097-104. doi: 10.1021/am400964c. Epub 2013 Jun 3.
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·cm(-2) under the illumination of simulated sunlight and visible light, respectively. The monochromatic incident photon-to-electron conversion efficiency values at the wavelength of 380-520 nm are in the range of 50-60%, 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.
通过两次水热法，在 Ti 基底上成功制备出具有比较长纳米棒的 ZnO 纳米棒阵列。通过恒电流电沉积法，将具有高结晶度的 CdS 纳米颗粒沉积到 ZnO 纳米棒的表面。经过两次水热生长（第二次生长时间为 6 h）后，CdS 敏化 ZnO 纳米棒阵列具有最佳的光电化学性能。在模拟太阳光和可见光照射下，0 V 偏压下的光致电流密度分别为 23.7 和 15.8 mA·cm(-2)。在 380-520 nm 波长范围内的单色光入射光子-电子转换效率值在 50-60%之间，表明其具有较高的光电转换效率。可见光的贡献明显高于紫外光。本工作制备的光阳极在太阳光下从水中还原制氢的光电化学中有潜在的应用。
