Department of Chemical and Materials Engineering, The University of Auckland, Auckland 1142, New Zealand.
Department of Chemical and Materials Engineering, The University of Auckland, Auckland 1142, New Zealand; NZ Product Accelerator, Faculty of Engineering, The University of Auckland, Auckland 1142, New Zealand.
Chemosphere. 2018 Aug;204:193-201. doi: 10.1016/j.chemosphere.2018.04.012. Epub 2018 Apr 9.
The modification of titanium dioxide (TiO) using noble metal nanoparticles is considered as a promising technique to make electrode with outstanding photocatalytic performance. In this paper, self-organized anodic TiO nanotube arrays were decorated with well-distributed small Cu nanoparticles through a novel technique that combines magnetron sputtering and thermal dewetting. The obtained nanocomposite catalyst exhibited 4-fold increase in the photodegradation rate of methylene blue aqueous solution under solar light irradiation than anatase TiO prepared with same anodization conditions. The enhanced photocatalytic activity was attributed to the synergistic effect of Schottky barrier and Surface plasmon resonance. The influence of post annealing process, sputtering time and thermal dewetting temperature on photocatalytic performance was studied and the optimal preparation conditions were proposed. The results of this study may provide a new strategy to improve photocatalytic efficiency of TiO without using high-cost noble metals.
使用贵金属纳米粒子对二氧化钛（TiO）进行修饰被认为是一种很有前途的技术，可以制备出具有出色光催化性能的电极。本文通过一种结合磁控溅射和热去湿技术的新方法，在自组织阳极 TiO 纳米管阵列上修饰了分布均匀的小 Cu 纳米粒子。与采用相同阳极氧化条件制备的锐钛矿 TiO 相比，所得纳米复合材料催化剂在太阳光照射下对亚甲基蓝水溶液的光降解率提高了 4 倍。增强的光催化活性归因于肖特基势垒和表面等离子体共振的协同效应。研究了后退火过程、溅射时间和热去湿温度对光催化性能的影响，并提出了最佳的制备条件。本研究的结果可能为提高 TiO 的光催化效率提供一种新策略，而无需使用昂贵的贵金属。
