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采用阳极氧化法在有机介质中制备垂直排列的厚度达百微米的TiO2纳米管阵列,重点考察TiO2纳米管表面形貌特性的控制,以期从微观修饰角度来提高TiO2纳米管阵列膜的光电化学性能;在此基础上,考察不同处理条件下的TiO2纳米管阵列膜的光电化学特性。实验结果表明:采用无水乙醇作为超声液并结合二次蒸馏水进行漂洗能彻底清除纳米管表面聚集堵塞部分,得到清洁、规整有序的纳米管阵列表面,且不破坏纳米管阵列膜的最佳超声振动时间为20～30s。在对纳米管阵列的表面形貌特性进行控制后,采用一步阳极氧化法+无水乙醇超声制备的样品经500℃退火在全谱段的光转换效率达到1.48%,证实对纳米管阵列的表面形貌特性实施控制能有效提高其光电化学性能。
A series of TiO2 nanotubes arrayed vertically arranged in organic media were prepared by anodic oxidation method. The morphologies of TiO2 nanotubes were investigated in order to improve the photoelectrochemical properties of TiO2 nanotube arrays On this basis, the photoelectrochemical properties of TiO2 nanotube array films under different processing conditions were investigated. The experimental results show that the use of anhydrous ethanol as the ultrasonic solution combined with the second distilled water rinsing can completely eliminate the surface of the nanotubes gathered blockage, get clean, regular and orderly nanotube array surface, and does not undermine the best nanotube array film Ultrasonic vibration time is 20 ~ 30s. After controlling the surface topography of the nanotube array, the light conversion efficiency of the sample prepared by one-step anodization + anhydrous ethanol ultrasound was 1.48% in the whole spectral range after annealed at 500 ° C, confirming that the surface of the nanotube array The control of the topography can effectively improve its photoelectrochemical properties.