Selective Removal of the Outer Shells of Anodic TiO2 Nanotubes (pages 37–44)
Hui Li, Jian-Wen Cheng, Shiwei Shu, Jie Zhang, Lingxia Zheng, Chun Kwan Tsang, Hua Cheng, Fengxia Liang, Shuit-Tong Lee and Yang Yang Li
Version of Record online: 9 OCT 2012 | DOI: 10.1002/smll.201201874
A facile electrochemical method to selectively remove the outer walls of anodic TiO2 nanotubes by leaving the as-anodized nanotubes in the same electrolyte and applying an electric field parallel to the anodic film for several minutes is reported. The better-separated single-walled TiO2 nanotubes thus obtained show significantly improved photocatalytic efficiency compared with their non-etched counterparts.