TiO_2-Nb_2O_5 Nanotubes with Electrochemically Tunable Morphologies

摘要

Recently, reports on the synthesis of TiO2 nanotubes have generated considerable scientific interest,[1]-[5] owing to the broad range of applications of the oxide. TiO2 can be used in solar cells,[6] photocatalytic devices,[8] and lithium-ion batteries,[9]and exhibits highly variable and tunable wetting behavior.[7] A particularly attractive method for the production of TiO2 nanotubes is the controlled anodization of Ti in a fluoride-containing electrolyte, as self-organized and highly ordered layers of nanotubes can be generated.[10] A range of unusual properties have recently been described for these nanotubes, including wettability control (from superhydrophilic to superhydrophobic),[11] photo-electrochemical properties,[12] and pronounced electrochromic behavior.