Department of Mechanical Engineering, National Chung-Hsing University, Taichung, Taiwan.
Nanotechnology. 2010 Mar 19;21(11):115206. doi: 10.1088/0957-4484/21/11/115206. Epub 2010 Feb 24.
In this study, a novel method for fabricating a high efficiency titanium dioxide photocatalyst is presented. Radio frequency (RF) magnetron sputtering was employed to grow 3D nano-structured Au thin films using the barrier-layer side of anodic aluminum oxide (AAO) as the template. The template was prepared by immersing this side of an AAO film into a 30 wt% phosphoric acid solution to modify the surface of the barrier layer in such a manner that a contrasting surface was obtained. The electrophoretic deposition method was then implemented to uniformly deposit TiO(2) nanoparticles on the 3D nano-structured Au electrode. The efficiency of the proposed photocatalyst, in terms of the photolysis efficiency, was measured using proton-motive-force driving chloroplastmimic photovoltaics. Experiments were carried out to demonstrate the photolysis efficiency of the proposed 3D nano-structured TiO(2) photocatalyst, which showed a 10-fold increase over that of Degussa P25 plane TiO(2). The photocurrent could be further enhanced by the deposition of a sensitized dye, such as N3, which extended the absorption spectrum from the UV range to the visible light range.
在这项研究中，提出了一种制备高效二氧化钛光催化剂的新方法。采用射频（RF）磁控溅射技术，利用阳极氧化铝（AAO）的阻挡层侧作为模板生长 3D 纳米结构的 Au 薄膜。模板的制备方法是将 AAO 薄膜的这一侧浸入 30wt%磷酸溶液中，以修饰阻挡层的表面，从而获得具有对比表面的模板。然后采用电泳沉积法将 TiO(2)纳米颗粒均匀地沉积在 3D 纳米结构的 Au 电极上。利用质子动力驱动叶绿体模拟光伏技术，测量了所提出的光催化剂的光解效率。实验结果表明，所提出的 3D 纳米结构 TiO(2)光催化剂的光解效率比 Degussa P25 平面 TiO(2)提高了 10 倍。通过沉积敏化染料，如 N3，可以进一步提高光电流，从而将吸收光谱从紫外光范围扩展到可见光范围。
