Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany.
Nano Lett. 2011 Sep 14;11(9):3649-55. doi: 10.1021/nl2015262. Epub 2011 Jul 28.
We report a spontaneous phase transformation of titania nanotubes induced by water at room temperature, which enables the as-anodized amorphous nanotubes to be crystallized into anatase mesoporous nanowires without any other post-treatments. These mesoporous TiO(2) nanomaterials have a markedly improved surface area, about 5.5 times than that of the as-anodized TiO(2) nanotubes, resulting in a pronounced enhanced photocatalytic activity. The present approach not only allows a flexible control over the morphology of TiO(2) nanostructures but can fundamentally eliminate the need for high temperature operations for crystallizing amorphous TiO(2).
我们报告了在室温下水诱导的二氧化钛纳米管的自发相变，这使得未经任何后处理的原始非晶态纳米管能够晶化为锐钛矿介孔纳米线。这些介孔 TiO(2) 纳米材料具有显著提高的比表面积，约为原始阳极氧化 TiO(2) 纳米管的 5.5 倍，从而导致显著增强的光催化活性。这种方法不仅允许灵活控制 TiO(2) 纳米结构的形态，而且可以从根本上消除对非晶态 TiO(2) 进行高温处理的需求。
